Who ranks #1 on the GDP-PDF leaderboard?
As of September 2, 2026, Claude Fable 5.1 by Anthropic ranks #1 on GDP-PDF at 85.4%. API pricing is $10.00/M input and $50.00/M output.
As of September 2, 2026, Claude Fable 5.1 is #1 for GDP-PDF at 85.4%. Ranked by the GDP-PDF score 25 models in this index have a published GDP-PDF score. GDP-PDF leaderboard: rank models by GDP-PDF next to live API token prices.
25 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 GDP-PDF at 85.4%. Ranked by the GDP-PDF score This board also tracks GDP-PDF. Next on the same board: Claude Mythos 5.1 and Claude Sonnet 5. This gdp-pdf leaderboard ranks models by GDP-PDF. 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 | GDP-PDF | Input /M | Output /M |
|---|---|---|---|---|
| 1 | Claude Fable 5.1 | 85.4% | $10.00 | $50.00 |
| 2 | Claude Mythos 5.1 | 85.4% | $10.00 | $50.00 |
| 3 | Claude Sonnet 5 | 81.6% | $2.00 | $10.00 |
| 4 | Gemini 3.7 Flash | 34% | $0.75 | $3.75 |
| 5 | GPT-5.6 Sol | 30.7% | $5.00 | $30.00 |
| 6 | Claude Fable 5 | 29.8% | $10.00 | $50.00 |
| 7 | GPT-5.5 | 25% | $5.00 | $30.00 |
| 8 | GPT-5.6 Terra | 24.7% | $2.00 | $12.00 |
Rank one eval at a time. All LLM benchmarks.
As of September 2, 2026, Claude Fable 5.1 by Anthropic ranks #1 on GDP-PDF at 85.4%. API pricing is $10.00/M input and $50.00/M output.
The current GDP-PDF ranking as of September 2, 2026 is 1. Claude Fable 5.1 at 85.4%; 2. Claude Mythos 5.1 at 85.4%; 3. Claude Sonnet 5 at 81.6%.
GPT-5.6 Luna is the cheapest scored model on this gdp-pdf leaderboard at $0.20/M input and $1.20/M output ($1.40 blended). Claude Fable 5.1 still leads GDP-PDF at 85.4%.
Not automatically. Claude Fable 5.1 leads GDP-PDF, but a cheaper scored model can be the better production choice if the quality gap is small. Use the table to weigh GDP-PDF 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.
GDP-PDF is a public LLM eval (the GDP-PDF score). This page ranks models that have published a score, next to live API prices.
This page is the GDP-PDF leaderboard. Models are sorted by GDP-PDF, 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 GDP-PDF score next to live API $/M so you can pick a production SKU, not only a trophy number.