Claude Sonnet 5.5

AnthropicCurrent

Input price: $2.00; Per 1 million tokens (USD)
Output price: $10.00; Per 1 million tokens (USD)
Effort levels: 5total; Default: High
Benchmark results: 62total; Benchmark types: 24

Model information

API model ID: claude-sonnet-5-5
release date: 2026-09-28
effort: Low / Med / High (default) / Xhigh / Max
Effort source: Based on Anthropic effort documentation (platform.claude.com/docs/en/build-with-claude/effort).
Claude Code: available
Codex: unavailable
Availability notes: `sonnet` resolves to Sonnet 5.5 on Anthropic API (as of v2.1.284). Claude Code default effort is medium (API default is high). Codex's official model list (learn.chatgpt.com/docs/models) contains only OpenAI models, so codex is false (connections via a custom provider are not counted as official options).
Availability source: https://code.claude.com/docs/en/model-config

Price (USD per 1 million tokens)

Prices do not vary by effort; token consumption does.

input	$2.00
output	$10.00
cache read	$0.10
cache write	$2.50

cacheWritePerMTok is for a 5-minute cache write. 1h write $4. cache read 0.05x.

Claude Sonnet 5.5 | $2 / MTok | $2.50 / MTok | $4 / MTok | $0.10 / MTok | $10 / MTok

Source: https://platform.claude.com/docs/en/about-claude/pricing

Benchmark results

Benchmark	effort	Score	Source cost (metric)	measured/reported by	source	Conditions and extraction method
Terminal-Bench 4.0Low	Low	20.0%	$0.76Cost per attempt	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "Terminal-Bench 4.0 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt Terminal-Bench 4.0 — Accuracy vs. cost: "Sonnet 5.5 · Low: 20.0% $0.76"
Terminal-Bench 4.0Low	Low	20.0%	$0.62Cost per attempt	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "Terminal-Bench 4.0 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic); cost series calculated using cache read at $0.10/MTok; the same figure also has a series calculated using cache read at $0.20/MTok, and the cost of that point is $0.79transcribed from text Source excerpt Terminal-Bench 4.0 — Accuracy vs. cost: "Sonnet 5.5 ($0.10 cache reads) · Low: 20.0% $0.62"
Terminal-Bench 4.0Med	Med	28.8%	$0.83Cost per attempt	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "Terminal-Bench 4.0 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt Terminal-Bench 4.0 — Accuracy vs. cost: "Sonnet 5.5 · Med: 28.8% $0.83"
Terminal-Bench 4.0Med	Med	28.8%	$0.68Cost per attempt	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "Terminal-Bench 4.0 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic); cost series calculated using cache read at $0.10/MTok; the same figure also has a series calculated using cache read at $0.20/MTok, and the cost of that point is $0.86transcribed from text Source excerpt Terminal-Bench 4.0 — Accuracy vs. cost: "Sonnet 5.5 ($0.10 cache reads) · Med: 28.8% $0.68"
Terminal-Bench 4.0High (default)	High	43.0%	$1.94Cost per attempt	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "Terminal-Bench 4.0 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt Terminal-Bench 4.0 — Accuracy vs. cost: "Sonnet 5.5 · High: 43.0% $1.94"
Terminal-Bench 4.0High (default)	High	43.0%	$1.46Cost per attempt	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "Terminal-Bench 4.0 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic); cost series calculated using cache read at $0.10/MTok; the same figure also has a series calculated using cache read at $0.20/MTok, and the cost of that point is $1.97transcribed from text Source excerpt Terminal-Bench 4.0 — Accuracy vs. cost: "Sonnet 5.5 ($0.10 cache reads) · High: 43.0% $1.46"
Terminal-Bench 4.0Xhigh	Xhigh	61.5%	$5.30Cost per attempt	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "Terminal-Bench 4.0 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt Terminal-Bench 4.0 — Accuracy vs. cost: "Sonnet 5.5 · Xhigh: 61.5% $5.30"
Terminal-Bench 4.0Xhigh	Xhigh	61.5%	$4.34Cost per attempt	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "Terminal-Bench 4.0 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic); cost series calculated using cache read at $0.10/MTok; the same figure also has a series calculated using cache read at $0.20/MTok, and the cost of that point is $5.83transcribed from text Source excerpt Terminal-Bench 4.0 — Accuracy vs. cost: "Sonnet 5.5 ($0.10 cache reads) · Xhigh: 61.5% $4.34"
Terminal-Bench 4.0Max	Max	70.6%	$12.54Cost per attempt	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "Terminal-Bench 4.0 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt Terminal-Bench 4.0 — Accuracy vs. cost: "Sonnet 5.5 · Max: 70.6% $12.54"
Terminal-Bench 4.0Max	Max	70.6%	$10.44Cost per attempt	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "Terminal-Bench 4.0 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic); cost series calculated using cache read at $0.10/MTok; the same figure also has a series calculated using cache read at $0.20/MTok, and the cost of that point is $14.15transcribed from text Source excerpt Terminal-Bench 4.0 — Accuracy vs. cost: "Sonnet 5.5 ($0.10 cache reads) · Max: 70.6% $10.44"
Terminal-Bench-Science 0.1Max	Max	59.9%	—	Anthropic	Claude Sonnet 5.5 System Cardofficial · Retrieved 2026-11-14	Vendor-reported value. Claude Code --bare, max, 70 tasks. No internet; safeguards enabled. No fallback was triggered. Cost not stated.transcribed from text Source excerpt 59.9%Location §8.6 “Terminal-Bench-Science 0.1”, body text, own model score
FrontierCode v1.1(main set)Low	Low	29.3%	$0.19Cost per task	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "FrontierCode v1.1, main set / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt FrontierCode v1.1, main set — Accuracy vs. cost: "Sonnet 5.5 · Low: 29.3% $0.19"
FrontierCode v1.1(main set)Med	Med	36.5%	$0.24Cost per task	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "FrontierCode v1.1, main set / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt FrontierCode v1.1, main set — Accuracy vs. cost: "Sonnet 5.5 · Med: 36.5% $0.24"
FrontierCode v1.1(main set)High (default)	High	49.4%	$0.42Cost per task	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "FrontierCode v1.1, main set / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt FrontierCode v1.1, main set — Accuracy vs. cost: "Sonnet 5.5 · High: 49.4% $0.42"
FrontierCode v1.1(main set)Xhigh	Xhigh	52.1%	$1.59Cost per task	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "FrontierCode v1.1, main set / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt FrontierCode v1.1, main set — Accuracy vs. cost: "Sonnet 5.5 · Xhigh: 52.1% $1.59"
FrontierCode v1.1(main set)Xhigh	Xhigh	52.1%	—	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. table note: see the Haiku 5.5 System Card (effort not stated); Sonnet 5.5 is in the "For reference" columntranscribed from table Source excerpt 52.1%Location Table, FrontierCode v1.1 (Main) row: 52.1
FrontierCode v1.1(main set)Max	Max	46.2%	$20.78Cost per task	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "FrontierCode v1.1, main set / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt FrontierCode v1.1, main set — Accuracy vs. cost: "Sonnet 5.5 · Max: 46.2% $20.78"
FrontierSWE 2Max	Max	61.9%	—	Proximal	Claude Sonnet 5.5 System Cardofficial · Retrieved 2026-11-14	Vendor-reported value. Run by Proximal in its own agent harness. max, 34 tasks, averaged over 5 trials per task. Cost not stated.transcribed from text Source excerpt 61.9%Location §8.7 “FrontierSWE v2”, body text, own model score
CursorBench 4.0Low	Low	35.8%	$0.50Cost per task	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "CursorBench 4.0 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt CursorBench 4.0 — Accuracy vs. cost: "Sonnet 5.5 · Low: 35.8% $0.50"
CursorBench 4.0Med	Med	39.2%	$0.70Cost per task	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "CursorBench 4.0 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt CursorBench 4.0 — Accuracy vs. cost: "Sonnet 5.5 · Med: 39.2% $0.70"
CursorBench 4.0High (default)	High	47.8%	$1.67Cost per task	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "CursorBench 4.0 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt CursorBench 4.0 — Accuracy vs. cost: "Sonnet 5.5 · High: 47.8% $1.67"
CursorBench 4.0Xhigh	Xhigh	53.1%	$3.88Cost per task	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "CursorBench 4.0 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt CursorBench 4.0 — Accuracy vs. cost: "Sonnet 5.5 · Xhigh: 53.1% $3.88"
CursorBench 4.0Max	Max	55.5%	$9.67Cost per task	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "CursorBench 4.0 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt CursorBench 4.0 — Accuracy vs. cost: "Sonnet 5.5 · Max: 55.5% $9.67"
GDPval-AA v2.1not stated	not stated	1,844	—	Artificial Analysis	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. table note: For details on how we run our evaluations, see the Sonnet 5.5 System Card (only efforts explicitly stated in the table); footnote 3: run by Artificial Analysis on a pre-release deployment (structured outputs bug, now fixed)transcribed from table Source excerpt 1844Location Table, GDPval-AA v2.1 row: 1844
GDPval-AA v2.1Low	Low	1,179	$0.22Cost per task	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "GDPval-AA v2.1 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt GDPval-AA v2.1 — Accuracy vs. cost: "Sonnet 5.5 · Low: 1179.0 $0.22"
GDPval-AA v2.1Med	Med	1,324	$0.27Cost per task	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "GDPval-AA v2.1 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt GDPval-AA v2.1 — Accuracy vs. cost: "Sonnet 5.5 · Med: 1324.0 $0.27"
GDPval-AA v2.1High (default)	High	1,551	$0.62Cost per task	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "GDPval-AA v2.1 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt GDPval-AA v2.1 — Accuracy vs. cost: "Sonnet 5.5 · High: 1551.0 $0.62"
GDPval-AA v2.1Xhigh	Xhigh	1,731	$1.88Cost per task	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "GDPval-AA v2.1 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt GDPval-AA v2.1 — Accuracy vs. cost: "Sonnet 5.5 · Xhigh: 1731.0 $1.88"
GDPval-AA v2.1Max	Max	1,840	$6.78Cost per task	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "GDPval-AA v2.1 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt GDPval-AA v2.1 — Accuracy vs. cost: "Sonnet 5.5 · Max: 1840.0 $6.78"
AA-Briefcase v1.1(Elo)not stated	not stated	1,824	—	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. table note: see the Haiku 5.5 System Card (effort not stated); Sonnet 5.5 is in the "For reference" columntranscribed from table Source excerpt 1824Location Table, AA-Briefcase v1.1 (Elo) row: 1824
AA-Briefcase v1.1(Elo)Low	Low	1,264	$0.87Cost per task	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "AA-Briefcase v1.1 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt AA-Briefcase v1.1 — Accuracy vs. cost: "Sonnet 5.5 · Low: 1264.0 $0.87"
AA-Briefcase v1.1(Elo)Med	Med	1,461	$1.64Cost per task	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "AA-Briefcase v1.1 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt AA-Briefcase v1.1 — Accuracy vs. cost: "Sonnet 5.5 · Med: 1461.0 $1.64"
AA-Briefcase v1.1(Elo)High (default)	High	1,634	$3.95Cost per task	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "AA-Briefcase v1.1 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt AA-Briefcase v1.1 — Accuracy vs. cost: "Sonnet 5.5 · High: 1634.0 $3.95"
AA-Briefcase v1.1(Elo)Xhigh	Xhigh	1,746	$9.63Cost per task	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "AA-Briefcase v1.1 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt AA-Briefcase v1.1 — Accuracy vs. cost: "Sonnet 5.5 · Xhigh: 1746.0 $9.63"
AA-Briefcase v1.1(Elo)Max	Max	1,811	$29.19Cost per task	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "AA-Briefcase v1.1 / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt AA-Briefcase v1.1 — Accuracy vs. cost: "Sonnet 5.5 · Max: 1811.0 $29.19"
Humanity's Last Exam (with tools)not stated	not stated	64.5%	—	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. table note: For details on how we run our evaluations, see the Sonnet 5.5 System Card (only efforts explicitly stated in the table)transcribed from table Source excerpt 64.5%Location Table, Humanity's Last Exam (with tools) row: 64.5
Humanity's Last Exam (with tools)not stated	not stated	64.5%	—	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. table note: see the Haiku 5.5 System Card (effort not stated); Sonnet 5.5 is in the "For reference" columntranscribed from table Source excerpt 64.5%Location Table, Humanity's Last Exam (with tools) row: 64.5
Humanity's Last Exam (without tools)Low	Low	41.4%	$0.03Cost per attempt	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "Humanity’s Last Exam (no tools) / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt Humanity’s Last Exam (no tools) — Accuracy vs. cost: "Sonnet 5.5 · Low: 41.4% $0.03"
Humanity's Last Exam (without tools)Med	Med	43.2%	$0.03Cost per attempt	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "Humanity’s Last Exam (no tools) / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt Humanity’s Last Exam (no tools) — Accuracy vs. cost: "Sonnet 5.5 · Med: 43.2% $0.03"
Humanity's Last Exam (without tools)High (default)	High	47.9%	$0.08Cost per attempt	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "Humanity’s Last Exam (no tools) / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt Humanity’s Last Exam (no tools) — Accuracy vs. cost: "Sonnet 5.5 · High: 47.9% $0.08"
Humanity's Last Exam (without tools)Xhigh	Xhigh	53.0%	$0.20Cost per attempt	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "Humanity’s Last Exam (no tools) / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt Humanity’s Last Exam (no tools) — Accuracy vs. cost: "Sonnet 5.5 · Xhigh: 53.0% $0.20"
Humanity's Last Exam (without tools)Max	Max	56.9%	$0.89Cost per attempt	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "Humanity’s Last Exam (no tools) / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt Humanity’s Last Exam (no tools) — Accuracy vs. cost: "Sonnet 5.5 · Max: 56.9% $0.89"
OSWorld 2.1(partial)not stated	not stated	80.1%	—	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. table note: For details on how we run our evaluations, see the Sonnet 5.5 System Card (only efforts explicitly stated in the table)transcribed from table Source excerpt 80.1%Location Table, OSWorld 2.1 (partial) row: 80.1
OSWorld 2.1(offline subset)Low	Low	57.9%	$0.68Cost per attempt	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "OSWorld 2.1 (offline subset) / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt OSWorld 2.1 (offline subset) — Accuracy vs. cost: "Sonnet 5.5 · Low: 57.9% $0.68"
OSWorld 2.1(offline subset)Med	Med	66.0%	$0.93Cost per attempt	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "OSWorld 2.1 (offline subset) / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt OSWorld 2.1 (offline subset) — Accuracy vs. cost: "Sonnet 5.5 · Med: 66.0% $0.93"
OSWorld 2.1(offline subset)High (default)	High	73.2%	$1.38Cost per attempt	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "OSWorld 2.1 (offline subset) / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt OSWorld 2.1 (offline subset) — Accuracy vs. cost: "Sonnet 5.5 · High: 73.2% $1.38"
OSWorld 2.1(offline subset)Xhigh	Xhigh	81.1%	$2.22Cost per attempt	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "OSWorld 2.1 (offline subset) / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt OSWorld 2.1 (offline subset) — Accuracy vs. cost: "Sonnet 5.5 · Xhigh: 81.1% $2.22"
OSWorld 2.1(offline subset)Max	Max	83.9%	$5.73Cost per attempt	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. A point in the figure "OSWorld 2.1 (offline subset) / Accuracy vs. cost" on the Anthropic announcement page. values were taken from each point's aria-label (DOM); the page shows them only in the figure; value for its own model (announced by Anthropic)transcribed from text Source excerpt OSWorld 2.1 (offline subset) — Accuracy vs. cost: "Sonnet 5.5 · Max: 83.9% $5.73"
Chartography (with tools)Max	Max	90.2%	—	Anthropic	Claude Sonnet 5.5 System Cardofficial · Retrieved 2026-11-14	Vendor-reported value. Run internally by Anthropic. adaptive thinking, max, with tools, averaged over 5 runs. The grader is Gemini 3.5 Flash. Cost not stated.transcribed from text Source excerpt 90.2%Location §8.13.1 “Chartography”, body text, own model with tools score
Chartography (without tools)not stated	not stated	61.6%	—	Anthropic	Introducing Claude Sonnet 5.5official · Retrieved 2026-11-12	Vendor-reported value. table note: For details on how we run our evaluations, see the Sonnet 5.5 System Card (only efforts explicitly stated in the table)transcribed from table Source excerpt 61.6%Location Table, Chartography (no tools) row: 61.6
Chartography (without tools)not stated	not stated	61.6%	—	Anthropic	Introducing Claude Haiku 5.5official · Retrieved 2026-11-12	Vendor-reported value. table note: see the Haiku 5.5 System Card (effort not stated); Sonnet 5.5 is in the "For reference" columntranscribed from table Source excerpt 61.6%Location Table, Chartography (no tools) row: 61.6
HealthBench Professional (length-adjusted score)Max	Max	63	—	Artificial Analysis	Claude Fable 5.2 and Claude Mythos 5.2 System Cardofficial · Retrieved 2026-11-14	Vendor-reported value. Independently run by Artificial Analysis at Anthropic’s request. max, length-adjusted score, GPT-5.4 low grader. fallback enabled. Not comparable with internal runs in earlier Claude system cards (Opus 4.8 grader). Cost not stated.transcribed from text Source excerpt 63.0%Location §8.16.2 “HealthBench Professional (Artificial Analysis)”, body text, the model’s length-adjusted score in parentheses
GPQA DiamondMax	Max	95.6%	—	Epoch AI	Epoch AI, Capabilities & benchmarking (benchmark_data.zip, gpqa_diamond.csv) CC BY 4.0third-party · Retrieved 2026-11-12	Run by Epoch AI (third-party measurement). Source label "Claude Sonnet 5.5 (max)". effort is indicated by the suffix _max in Epoch's Model version. Data retrieved 2026-11-12.transcribed from table Source excerpt gpqa_diamond.csv: Model version=claude-sonnet-5-5_max, Best score (across scorers)=0.9558080808080808, stderr=0.013710320714521202, Started at=2026-09-29T15:15:14.000Z
FrontierMath Tiers 1-3(v2)Max	Max	88.8%	—	Epoch AI	Epoch AI, Capabilities & benchmarking (benchmark_data.zip, frontiermath_tiers_1_3_v2.csv) CC BY 4.0third-party · Retrieved 2026-11-12	Run by Epoch AI (third-party measurement). Source label "Claude Sonnet 5.5 (max)". effort is indicated by the suffix _max in Epoch's Model version. Data retrieved 2026-11-12.transcribed from table Source excerpt frontiermath_tiers_1_3_v2.csv: Model version=claude-sonnet-5-5_max, Best score (across scorers)=0.887719298245614, stderr=0.018734030360524248, Started at=2026-09-29T15:15:14.000Z
FrontierMath Tier 4(v2)Max	Max	80.5%	—	Epoch AI	Epoch AI, Capabilities & benchmarking (benchmark_data.zip, frontiermath_tier_4_v2.csv) CC BY 4.0third-party · Retrieved 2026-11-12	Run by Epoch AI (third-party measurement). Source label "Claude Sonnet 5.5 (max)". effort is indicated by the suffix _max in Epoch's Model version. Data retrieved 2026-11-12.transcribed from table Source excerpt frontiermath_tier_4_v2.csv: Model version=claude-sonnet-5-5_max, Best score (across scorers)=0.8048780487804879, stderr=0.06265967111543964, Started at=2026-09-29T15:15:14.000Z
OTIS Mock AIME 2024-2025Max	Max	100.0%	—	Epoch AI	Epoch AI, Capabilities & benchmarking (benchmark_data.zip, otis_mock_aime_2024_2025.csv) CC BY 4.0third-party · Retrieved 2026-11-12	Run by Epoch AI (third-party measurement). Source label "Claude Sonnet 5.5 (max)". effort is indicated by the suffix _max in Epoch's Model version. Data retrieved 2026-11-12.transcribed from table Source excerpt otis_mock_aime_2024_2025.csv: Model version=claude-sonnet-5-5_max, Best score (across scorers)=1.0, stderr=0.0, Started at=2026-09-29T15:15:14.000Z
SimpleQA VerifiedMax	Max	46.5%	—	Epoch AI	Epoch AI, Capabilities & benchmarking (benchmark_data.zip, simpleqa_verified.csv) CC BY 4.0third-party · Retrieved 2026-11-12	Run by Epoch AI (third-party measurement). Source label "Claude Sonnet 5.5 (max)". effort is indicated by the suffix _max in Epoch's Model version. Data retrieved 2026-11-12.transcribed from table Source excerpt simpleqa_verified.csv: Model version=claude-sonnet-5-5_max, Best score (across scorers)=0.465, stderr=0.015780495050030086, Started at=2026-09-29T15:15:14.000Z
Chess Puzzles(Epoch AI)Max	Max	59.0%	—	Epoch AI	Epoch AI, Capabilities & benchmarking (benchmark_data.zip, chess_puzzles.csv) CC BY 4.0third-party · Retrieved 2026-11-12	Run by Epoch AI (third-party measurement). Source label "Claude Sonnet 5.5 (max)". effort is indicated by the suffix _max in Epoch's Model version. Data retrieved 2026-11-12.transcribed from table Source excerpt chess_puzzles.csv: Model version=claude-sonnet-5-5_max, Best score (across scorers)=0.59, stderr=0.04943110704237103, Started at=2026-10-13T13:00:38.000Z
MirrorCodeMax	Max	97.8%	—	Epoch AI	Epoch AI, Capabilities & benchmarking (benchmark_data.zip, mirrorcode.csv) CC BY 4.0third-party · Retrieved 2026-11-12	Run by Epoch AI (third-party measurement). Source label "Claude Sonnet 5.5 (max)". effort is indicated by the suffix _max in Epoch's Model version. Data retrieved 2026-11-12.transcribed from table Source excerpt mirrorcode.csv: Model version=claude-sonnet-5-5_max, Best score (across scorers)=0.9777777777777777, stderr=0.015141892085983264, Started at=2026-10-05T09:05:15.000Z
Epoch Capabilities Index(ECI)not stated	not stated	166.56	—	Epoch AI	Epoch AI, epoch_capabilities_index/eci_scores.csv (CC BY 4.0)third-party · Retrieved 2026-11-12	A per-model metric that combines results across multiple benchmarks and multiple efforts (not per effort). Calculated by Epoch AI.transcribed from table Source excerpt eci_scores.csv: Model=Claude Sonnet 5.5, eci=166.56, eci_ci_low=163.76, eci_ci_high=169.58
LMArena Text (style control, overall)Xhigh	Xhigh	1,473	—	LMArena	lmarena-ai/leaderboard-dataset text_style_control/latest-00000-of-00001.parquet (CC BY 4.0)third-party · Retrieved 2026-11-12	Human head-to-head votes (Bradley-Terry). Source label "Claude Sonnet 5.5 (xHigh)" (effort is in parentheses in the label). Release date 2026-11-09.transcribed from table Source excerpt model_name=Claude Sonnet 5.5 (xHigh), rating=1472.49, rating_lower=1466.3, rating_upper=1478.6, vote_count=13821, rank=46, category=overall, leaderboard_publish_date=2026-11-09
LMArena Text Coding (without style control)Xhigh	Xhigh	1,500	—	LMArena	lmarena-ai/leaderboard-dataset text/latest-00000-of-00001.parquet (CC BY 4.0)third-party · Retrieved 2026-11-12	Human head-to-head votes (Bradley-Terry). Source label "Claude Sonnet 5.5 (xHigh)" (effort is in parentheses in the label). Release date 2026-11-09.transcribed from table Source excerpt model_name=Claude Sonnet 5.5 (xHigh), rating=1500.17, rating_lower=1488.9, rating_upper=1511.4, vote_count=3207, rank=25, category=coding, leaderboard_publish_date=2026-11-09

Claude Sonnet 5.5

Model information

Price (USD per 1 million tokens)

Benchmark results

Related rankings

References