# Claude Sonnet (slim)

> Claude Sonnet, a family of models by Anthropic, listed from OpenRouter. Indexed, not reviewed: facts and our own checks, no score or ranking. Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is…

- Full: https://www.anchorterminal.com/tools/claude-sonnet.md (~650 tokens) · this version ~580 tokens · JSON https://www.anchorterminal.com/tools/claude-sonnet.json · canonical https://www.anchorterminal.com/tools/claude-sonnet
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · Updated: 2026-10-05

# Claude Sonnet

> Indexed, not reviewed: facts from OpenRouter and our own checks. No score, grade or rank, and not in the rankings until the panel reviews it. How the index works: https://www.anchorterminal.com/indexed/

- Kind: model family, by Anthropic
- Category: Model APIs & inference (https://www.anchorterminal.com/categories/inference.md)
- Listed because: OpenRouter lists it, with prices from the providers that serve it.
- What OpenRouter says: Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, succeeding Claude Sonnet 5 as a direct upgrade. It is especially strong at building features, fixing bugs, and producing...
- Some of these models are reviewed as part of Claude API: https://www.anchorterminal.com/tools/anthropic-api.md

## Models (5)

| Model | OpenRouter id | Released | Context | Input $/1M | Output $/1M | Supports |
| --- | --- | --- | --- | --- | --- | --- |
| Claude Sonnet 5.5 | `anthropic/claude-sonnet-5.5` | 2026-09 | 1M | $2 | $10 | tools, structured output, reasoning, caching, file, image |
| Claude Sonnet 5 | `anthropic/claude-sonnet-5` | 2026-06 | 1M | $2 | $10 | tools, structured output, reasoning, caching, file, image |
| Claude Sonnet 4.6 | `anthropic/claude-sonnet-4.6` | 2026-02 | 1M | $3 | $15 | tools, structured output, reasoning, caching, file, image |
| Claude Sonnet 4.5 | `anthropic/claude-sonnet-4.5` | 2025-09 | 1M | $3 | $15 | tools, structured output, reasoning, caching, file, image |
| Claude Sonnet 4 | `anthropic/claude-sonnet-4` | 2025-05 | 200k | $3 | $15 | tools, reasoning, caching, file, image |

Prices and limits as OpenRouter lists them; a provider's own price can differ.

- JSON: https://www.anchorterminal.com/api/v1/tools/claude-sonnet.json
- Being indexed says nothing about quality, and nobody can pay for it. Ask for a review: https://www.anchorterminal.com/builders/#claiming