Who ranks #1 on the ProgramBench leaderboard?
As of September 1, 2026, Claude Fable 5.1 by Anthropic ranks #1 on ProgramBench at 87.6%. API pricing is $10.00/M input and $50.00/M output.
As of September 1, 2026, Claude Fable 5.1 is #1 for ProgramBench at 87.6%. Ranked by the ProgramBench score 2 models in this index have a published ProgramBench score. ProgramBench leaderboard with live API prices. ProgramBench — rebuild a program from its binary and docs across a 1M-token window.
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As of September 1, 2026, Claude Fable 5.1 by Anthropic is #1 for ProgramBench at 87.6%. Ranked by the ProgramBench score This board also tracks ProgramBench. Next on the same board: Claude Mythos 5.1. This programbench leaderboard ranks models by ProgramBench. 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 | ProgramBench | Input /M | Output /M |
|---|---|---|---|---|
| 1 | Claude Fable 5.1 | 87.6% | $10.00 | $50.00 |
| 2 | Claude Mythos 5.1 | 87.6% | $10.00 | $50.00 |
Rank one eval at a time. All LLM benchmarks.
As of September 1, 2026, Claude Fable 5.1 by Anthropic ranks #1 on ProgramBench at 87.6%. API pricing is $10.00/M input and $50.00/M output.
The current ProgramBench ranking as of September 1, 2026 is 1. Claude Fable 5.1 at 87.6%; 2. Claude Mythos 5.1 at 87.6%.
Claude Fable 5.1 currently leads ProgramBench 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 ProgramBench, but a cheaper scored model can be the better production choice if the quality gap is small. Use the table to weigh ProgramBench 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 1, 2026. Treat it as a current index, not a one-off blog post.
ProgramBench — rebuild a program from its binary and docs across a 1M-token window. This page ranks models that have published a ProgramBench score, with live API token prices on the same row.
This page is the ProgramBench leaderboard. Models are sorted by ProgramBench, 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 ProgramBench score next to live API $/M so you can pick a production SKU, not only a trophy number.