Who ranks #1 on the ArXivMath (With Tools) leaderboard?
As of September 2, 2026, Claude Fable 5.1 by Anthropic ranks #1 on ArXivMath (With Tools) at 93.9%. API pricing is $10.00/M input and $50.00/M output.
As of September 2, 2026, Claude Fable 5.1 is #1 for ArXivMath (With Tools) at 93.9%. Ranked by the ArXivMath (With Tools) score 2 models in this index have a published ArXivMath (With Tools) score. ArXivMath (With Tools) leaderboard with live API prices. ArXivMath with tools — same research-math set with code execution enabled.
Next step
Auth, billing, and the API layer are already decided. Fork 8 finished AI apps, or have us build the first version with you.
The index
347 models across 36 providers. Search or jump to a lab — every model page stays linked here.









As of September 2, 2026, Claude Fable 5.1 by Anthropic is #1 for ArXivMath (With Tools) at 93.9%. Ranked by the ArXivMath (With Tools) score This board also tracks ArXivMath (With Tools). Next on the same board: Claude Mythos 5.1. This arxivmath (with tools) leaderboard ranks models by ArXivMath (With Tools). Scores come from public evals. Prices are the live API rates in the table above.
Sources: 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 | ArXivMath (With Tools) | Input /M | Output /M |
|---|---|---|---|---|
| 1 | Claude Fable 5.1 | 93.9% | $10.00 | $50.00 |
| 2 | Claude Mythos 5.1 | 93.9% | $10.00 | $50.00 |
Rank one eval at a time. All LLM benchmarks.
As of September 2, 2026, Claude Fable 5.1 by Anthropic ranks #1 on ArXivMath (With Tools) at 93.9%. API pricing is $10.00/M input and $50.00/M output.
The current ArXivMath (With Tools) ranking as of September 2, 2026 is 1. Claude Fable 5.1 at 93.9%; 2. Claude Mythos 5.1 at 93.9%.
Claude Fable 5.1 currently leads ArXivMath (With Tools) and is also the cheapest scored model on this page, at $10.00/M input and $50.00/M output ($60.00 blended).
Not automatically. Claude Fable 5.1 leads ArXivMath (With Tools), but a cheaper scored model can be the better production choice if the quality gap is small. Use the table to weigh ArXivMath (With Tools) 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.
ArXivMath with tools — same research-math set with code execution enabled. This page ranks models that have published a ArXivMath (With Tools) score, with live API token prices on the same row.
This page is the ArXivMath (With Tools) leaderboard. Models are sorted by ArXivMath (With Tools), with input and output token prices on the same row so you can weigh score against cost. Official boards often omit price; that comparison is the point of this index.
Official eval pages own the methodology. This page keeps the published ArXivMath (With Tools) score next to live API $/M so you can pick a production SKU, not only a trophy number.