Who ranks #1 on the Osworld Extended leaderboard?
As of August 20, 2026, Claude 3.5 Sonnet by Anthropic ranks #1 on Osworld Extended at 22%. API pricing is $3.00/M input and $15.00/M output.
As of August 20, 2026, Claude 3.5 Sonnet is #1 for Osworld Extended at 22%. Ranked by the Osworld Extended score 1 models in this index have a published Osworld Extended score. Osworld Extended leaderboard: rank models by Osworld Extended next to live API token prices.
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As of August 20, 2026, Claude 3.5 Sonnet by Anthropic is #1 for Osworld Extended at 22%. Ranked by the Osworld Extended score This board also tracks Osworld Extended. This osworld extended leaderboard ranks models by Osworld Extended. 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 | Osworld Extended | Input /M | Output /M |
|---|---|---|---|---|
| 1 | Claude 3.5 Sonnet | 22% | $3.00 | $15.00 |
Rank one eval at a time. All LLM benchmarks.
As of August 20, 2026, Claude 3.5 Sonnet by Anthropic ranks #1 on Osworld Extended at 22%. API pricing is $3.00/M input and $15.00/M output.
Claude 3.5 Sonnet currently leads Osworld Extended and is also the cheapest scored model on this page, at $3.00/M input and $15.00/M output ($18.00 blended).
Not automatically. Claude 3.5 Sonnet leads Osworld Extended, but a cheaper scored model can be the better production choice if the quality gap is small. Use the table to weigh Osworld Extended 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 August 20, 2026. Treat it as a current index, not a one-off blog post.
Osworld Extended is a public LLM eval (the Osworld Extended score). This page ranks models that have published a score, next to live API prices.
This page is the Osworld Extended leaderboard. Models are sorted by Osworld Extended, 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 Osworld Extended score next to live API $/M so you can pick a production SKU, not only a trophy number.