Humanity's Last Exam (without tools)
Expert-level academic knowledge and reasoning test (without tools).
- Category
- Reasoning
- Unit
- Percent (%)
- Higher is better
- Comparison groups
- 3total
- Currently available model rankings · Ranked results: 12
- All models (records): Groups: 3 · Entries: 13
Rankings
Values with different source types (official, third-party, paper) or measurement conditions cannot be compared, so rankings are separated by comparison group (the same source, or sources verified to use the same conditions).
Rankings include only models currently available in Claude Code / Codex, excluding legacy models.
- View on rankings page (by metric)
- Cost balance (frontier and effort changes)
- Overall ranking (performance first)
official results (Introducing Claude Haiku 5.5)
| Rank | Model | effort | Score | Source cost (metric) | measured/reported by | source |
|---|---|---|---|---|---|---|
| 1 | Claude Sonnet 5.5 | Max | 56.9% | $0.89Cost per attempt | Anthropic | Introducing Claude Haiku 5.5Retrieved 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)Source excerptHumanity’s Last Exam (no tools) — Accuracy vs. cost: "Sonnet 5.5 · Max: 56.9% $0.89" |
| 2 | Claude Sonnet 5.5 | Xhigh | 53.0% | $0.20Cost per attempt | Anthropic | Introducing Claude Haiku 5.5Retrieved 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)Source excerptHumanity’s Last Exam (no tools) — Accuracy vs. cost: "Sonnet 5.5 · Xhigh: 53.0% $0.20" |
| 3 | Claude Sonnet 5.5 | High | 47.9% | $0.08Cost per attempt | Anthropic | Introducing Claude Haiku 5.5Retrieved 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)Source excerptHumanity’s Last Exam (no tools) — Accuracy vs. cost: "Sonnet 5.5 · High: 47.9% $0.08" |
| 4 | Claude Haiku 5.5 | Max | 45.9% | $0.21Cost per attempt | Anthropic | Introducing Claude Haiku 5.5Retrieved 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)Source excerptHumanity’s Last Exam (no tools) — Accuracy vs. cost: "Haiku 5.5 · Max: 45.9% $0.21" |
| 5 | Claude Haiku 5.5 | Xhigh | 44.1% | $0.06Cost per attempt | Anthropic | Introducing Claude Haiku 5.5Retrieved 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)Source excerptHumanity’s Last Exam (no tools) — Accuracy vs. cost: "Haiku 5.5 · Xhigh: 44.1% $0.06" |
| 6 | Claude Sonnet 5.5 | Med | 43.2% | $0.03Cost per attempt | Anthropic | Introducing Claude Haiku 5.5Retrieved 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)Source excerptHumanity’s Last Exam (no tools) — Accuracy vs. cost: "Sonnet 5.5 · Med: 43.2% $0.03" |
| 7 | Claude Sonnet 5.5 | Low | 41.4% | $0.03Cost per attempt | Anthropic | Introducing Claude Haiku 5.5Retrieved 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)Source excerptHumanity’s Last Exam (no tools) — Accuracy vs. cost: "Sonnet 5.5 · Low: 41.4% $0.03" |
| 8 | Claude Haiku 5.5 | High | 39.7% | $0.02Cost per attempt | Anthropic | Introducing Claude Haiku 5.5Retrieved 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)Source excerptHumanity’s Last Exam (no tools) — Accuracy vs. cost: "Haiku 5.5 · High: 39.7% $0.02" |
| 9 | Claude Haiku 5.5 | Med | 35.5% | $0.007Cost per attempt | Anthropic | Introducing Claude Haiku 5.5Retrieved 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)Source excerptHumanity’s Last Exam (no tools) — Accuracy vs. cost: "Haiku 5.5 · Med: 35.5% $0.007" |
| 10 | Claude Haiku 5.5 | Low | 30.9% | $0.003Cost per attempt | Anthropic | Introducing Claude Haiku 5.5Retrieved 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)Source excerptHumanity’s Last Exam (no tools) — Accuracy vs. cost: "Haiku 5.5 · Low: 30.9% $0.003" |
official results (Claude Fable 5.2 and Claude Mythos 5.2 System Card)
| Rank | Model | effort | Score | Source cost (metric) | measured/reported by | source |
|---|---|---|---|---|---|---|
| 1 | Claude Fable 5.2 | Max | 73.2% | — | Anthropic | Claude Fable 5.2 and Claude Mythos 5.2 System CardRetrieved 2026-11-14 · Vendor-reported value. Default settings for Table 8.1.A: adaptive thinking, max effort, default sampling, averaged over 5 trials. without tools. Cost not stated.Source excerpt73.2Location Table 8.1.A “Evaluation summary”, Humanity’s Last Exam / No tools row, own model column |
official results (Claude Opus 5.5 System Card)
| Rank | Model | effort | Score | Source cost (metric) | measured/reported by | source |
|---|---|---|---|---|---|---|
| 1 | Claude Opus 5.5 | Max | 64.4% | — | Anthropic | Claude Opus 5.5 System CardRetrieved 2026-11-14 · Vendor-reported value. Default settings for Table 8.1.A: adaptive thinking, max effort, default sampling, averaged over 5 trials. without tools. Cost not stated.Source excerpt64.4Location Table 8.1.A “Evaluation summary”, Humanity’s Last Exam / No tools row, own model column |
All model rankings (records)
These rankings are recalculated by comparison group including legacy models and models unavailable in Claude Code / Codex. They differ from the rankings above because the set of models differs.
- View all model rankings (by metric)
- Cost balance (all models, records)
- Overall ranking (all models, records)
Show rankings including legacy and unavailable models (entries: 13)
official results (Introducing Claude Haiku 5.5)
| Rank | Model | effort | Score | Source cost (metric) | measured/reported by | source |
|---|---|---|---|---|---|---|
| 1 | Claude Sonnet 5.5 | Max | 56.9% | $0.89Cost per attempt | Anthropic | Introducing Claude Haiku 5.5Retrieved 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)Source excerptHumanity’s Last Exam (no tools) — Accuracy vs. cost: "Sonnet 5.5 · Max: 56.9% $0.89" |
| 2 | Claude Sonnet 5.5 | Xhigh | 53.0% | $0.20Cost per attempt | Anthropic | Introducing Claude Haiku 5.5Retrieved 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)Source excerptHumanity’s Last Exam (no tools) — Accuracy vs. cost: "Sonnet 5.5 · Xhigh: 53.0% $0.20" |
| 3 | Claude Sonnet 5.5 | High | 47.9% | $0.08Cost per attempt | Anthropic | Introducing Claude Haiku 5.5Retrieved 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)Source excerptHumanity’s Last Exam (no tools) — Accuracy vs. cost: "Sonnet 5.5 · High: 47.9% $0.08" |
| 4 | Claude Haiku 5.5 | Max | 45.9% | $0.21Cost per attempt | Anthropic | Introducing Claude Haiku 5.5Retrieved 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)Source excerptHumanity’s Last Exam (no tools) — Accuracy vs. cost: "Haiku 5.5 · Max: 45.9% $0.21" |
| 5 | Claude Haiku 5.5 | Xhigh | 44.1% | $0.06Cost per attempt | Anthropic | Introducing Claude Haiku 5.5Retrieved 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)Source excerptHumanity’s Last Exam (no tools) — Accuracy vs. cost: "Haiku 5.5 · Xhigh: 44.1% $0.06" |
| 6 | Claude Sonnet 5.5 | Med | 43.2% | $0.03Cost per attempt | Anthropic | Introducing Claude Haiku 5.5Retrieved 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)Source excerptHumanity’s Last Exam (no tools) — Accuracy vs. cost: "Sonnet 5.5 · Med: 43.2% $0.03" |
| 7 | Claude Sonnet 5.5 | Low | 41.4% | $0.03Cost per attempt | Anthropic | Introducing Claude Haiku 5.5Retrieved 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)Source excerptHumanity’s Last Exam (no tools) — Accuracy vs. cost: "Sonnet 5.5 · Low: 41.4% $0.03" |
| 8 | Claude Haiku 5.5 | High | 39.7% | $0.02Cost per attempt | Anthropic | Introducing Claude Haiku 5.5Retrieved 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)Source excerptHumanity’s Last Exam (no tools) — Accuracy vs. cost: "Haiku 5.5 · High: 39.7% $0.02" |
| 9 | Claude Haiku 5.5 | Med | 35.5% | $0.007Cost per attempt | Anthropic | Introducing Claude Haiku 5.5Retrieved 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)Source excerptHumanity’s Last Exam (no tools) — Accuracy vs. cost: "Haiku 5.5 · Med: 35.5% $0.007" |
| 10 | Claude Haiku 5.5 | Low | 30.9% | $0.003Cost per attempt | Anthropic | Introducing Claude Haiku 5.5Retrieved 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)Source excerptHumanity’s Last Exam (no tools) — Accuracy vs. cost: "Haiku 5.5 · Low: 30.9% $0.003" |
| 11 | Claude Haiku 4.5 | not stated | 10.2% | $0.09Cost per attempt | Anthropic | Introducing Claude Haiku 5.5Retrieved 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); no effort because the source effort label "max" is not in the official effort listSource excerptHumanity’s Last Exam (no tools) — Accuracy vs. cost: "Haiku 4.5 · Max: 10.2% $0.09" |
official results (Claude Fable 5.2 and Claude Mythos 5.2 System Card)
| Rank | Model | effort | Score | Source cost (metric) | measured/reported by | source |
|---|---|---|---|---|---|---|
| 1 | Claude Fable 5.2 | Max | 73.2% | — | Anthropic | Claude Fable 5.2 and Claude Mythos 5.2 System CardRetrieved 2026-11-14 · Vendor-reported value. Default settings for Table 8.1.A: adaptive thinking, max effort, default sampling, averaged over 5 trials. without tools. Cost not stated.Source excerpt73.2Location Table 8.1.A “Evaluation summary”, Humanity’s Last Exam / No tools row, own model column |
official results (Claude Opus 5.5 System Card)
| Rank | Model | effort | Score | Source cost (metric) | measured/reported by | source |
|---|---|---|---|---|---|---|
| 1 | Claude Opus 5.5 | Max | 64.4% | — | Anthropic | Claude Opus 5.5 System CardRetrieved 2026-11-14 · Vendor-reported value. Default settings for Table 8.1.A: adaptive thinking, max effort, default sampling, averaged over 5 trials. without tools. Cost not stated.Source excerpt64.4Location Table 8.1.A “Evaluation summary”, Humanity’s Last Exam / No tools row, own model column |