Grok 4.5

xAICurrent

Model information

API model ID: grok-4.5
release date: 2026-07-16
effort: Low / Med / High (default) / Xhigh
Effort source: Based on "Reasoning efforts Supported low, medium, high, xhigh Default high" on the model page in xAI API documentation (docs.x.ai/developers/models/grok-4.5, retrieved 2026-11-13).
Claude Code: unavailable
Codex: unavailable
Availability notes: The assessment from existing research (docs/research/2026-11-12/expand/vendor/models-unconfirmed.json, 2026-11-13) was carried over: absent from the official model list for Claude Code and the one for Codex. Not checked again this time.
Availability source: https://code.claude.com/docs/en/model-config

Prices do not vary by effort; token consumption does.

Requests exceeding 200K have separate pricing (amount not collected).

Input Tokens $2.00 / 1M tokens Cached tokens $0.30 / 1M tokens Output Tokens $6.00 / 1M tokens

Benchmark	effort	Score	Source cost (metric)	measured/reported by	source	Conditions and extraction method
τ²-bench banking_knowledge (v1.0.1)High (default)	High	47.9%	—	Sierra	τ²-bench leaderboard submission grok-4-5_sierra_2026-08-04 (sierra-research/tau2-bench, MIT)third-party · Retrieved 2026-11-13	τ²-bench leaderboard submission grok-4-5_sierra_2026-08-04 (submission_type standard, tau2_bench_version 1.0.1). Submitter "Sierra", model_organization "xAI": Run by Sierra, which operates τ²-bench (third-party measurement). Verified on the leaderboard (trajectories available, prompts not modified, no questions omitted). The value is pass^1 (%). reasoning_effort "high". User simulator gpt-5.2 (reasoning_effort low). Search configuration retrieval_config "alltools". Evaluation date 2026-07-24. Notes summary: 4 trial runs; seed 300.transcribed from table Source excerpt banking_knowledge.pass_1=47.93814432989691Location In submissions/grok-4-5_sierra_2026-08-04/submission.json: results.banking_knowledge.pass_1 (line 17 of file). model_name "Grok 4.5". methodology.notes (line 36)