Who ranks #1 on the HLE leaderboard?
As of September 2, 2026, Claude Fable 5.1 by Anthropic ranks #1 on HLE at 65%. API pricing is $10.00/M input and $50.00/M output.
As of September 2, 2026, Claude Fable 5.1 is #1 for HLE at 65%. Ranked by Humanity's Last Exam: 2,500 expert questions designed so search engines fail. Humanity's Last Exam leaderboard with HLE scores and API prices. Compare the hardest public reasoning exam across GPT, Claude, Gemini, and open models.
117 models. Left is cheaper. Up is a higher score. The line is the best score you can buy at each price โ a dot under it is a worse deal than something on the line.
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As of September 2, 2026, Claude Fable 5.1 by Anthropic is #1 for HLE at 65%. Ranked by Humanity's Last Exam: 2,500 expert questions designed so search engines fail. This board also tracks HLE, GPQA, GPQA Diamond, Humanity's Last Exam (With Tools). Next on the same board: Claude Mythos 5.1 and Claude Opus 5. Related leaders: GPT-5.6 Sol on GPQA at 94.6%; Gemini 3.7 Flash on GPQA Diamond at 94.8%. This hle leaderboard ranks models by HLE. Scores come from public evals. Prices are the live API rates in the table above.
Sources: Humanity's Last Exam (https://agi.safe.ai/); OpenAI API pricing (https://developers.openai.com/api/docs/pricing); Anthropic Claude API pricing (https://platform.claude.com/docs/en/about-claude/pricing); Gemini API pricing (https://ai.google.dev/gemini-api/docs/pricing)
| Rank | Model | HLE | Input /M | Output /M |
|---|---|---|---|---|
| 1 | Claude Fable 5.1 | 65% | $10.00 | $50.00 |
| 2 | Claude Mythos 5.1 | 65% | $10.00 | $50.00 |
| 3 | Claude Opus 5 | 64.7% | $5.00 | $25.00 |
| 4 | Claude Mythos Preview | 64.7% | $10.00 | $50.00 |
| 5 | Claude Fable 5 | 64.5% | $10.00 | $50.00 |
| 6 | GLM-5.3 | 62.5% | $1.40 | $4.40 |
| 7 | Muse Spark 1.1 | 62.1% | $1.25 | $4.25 |
| 8 | DeepSeek-V4-Pro-0813 | 60% | $1.32 | $3.96 |
Rank one eval at a time. All LLM benchmarks.
As of September 2, 2026, Claude Fable 5.1 by Anthropic ranks #1 on HLE at 65%. API pricing is $10.00/M input and $50.00/M output.
The current HLE ranking as of September 2, 2026 is 1. Claude Fable 5.1 at 65%; 2. Claude Mythos 5.1 at 65%; 3. Claude Opus 5 at 64.7%.
Nemotron 3.5 Lightning (30B A3B) is the cheapest scored model on this hle leaderboard at $0.05/M input and $0.20/M output ($0.25 blended). Claude Fable 5.1 still leads HLE at 65%.
Not automatically. Claude Fable 5.1 leads HLE, but a cheaper scored model can be the better production choice if the quality gap is small. Use the table to weigh HLE against input/output price, context window, and related evals.
Scores and API prices on this page are refreshed from published evals and provider rates. The snapshot is labeled September 2, 2026. Treat it as a current index, not a one-off blog post.
Humanity's Last Exam, or HLE, is a broad expert-level test from the Center for AI Safety. It is meant to stay hard after models saturate MMLU and GPQA.
Frontier models still sit well below human experts on the full exam. Compare models on this page rather than treating any single percentage as a pass mark.
Labs sometimes report HLE with tools and HLE without tools. We keep both columns when the score exists, plus GPQA as a second reasoning check.