Claude Sonnet 5
Rank of 27222from #20
Known for
Everyday agentic coding and tool use, where speed and price matter more than the last few points.
The most agentic Sonnet yet, and the first to beat the previous Opus on Terminal-Bench. The default model on Claude's free and Pro plans, at a fifth of Opus 5's input price.
What it does7
- 1M-token context by default, 128K output
- Adaptive thinking on by default
- New tokenizer
- Plans and drives browsers and terminals on its own
- $2 / $10 pricing made permanent in August 2026
- Default model on Free and Pro plans
- On Bedrock, Vertex AI and Microsoft Foundry
From Claude Sonnet 5’s own site. Not used for ranking.
31index score · LLMs
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