# Claude Sonnet 3.7

> Claude Sonnet 3.7 is a proprietary language model from Anthropic, released on 19 Feb 2025. It accepts text, images and PDFs and generates text, with a 200K-token context window and up to 64K output tokens per response.

Source page: https://www.aimodel.directory/models/claude-3-7-sonnet
Last verified: 4 Oct 2026

## Specifications

- **Developer:** Anthropic
- **Release date:** 19 Feb 2025 (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/abacus/models/claude-3-7-sonnet-20250219.toml)
- **Status:** Generally available (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/abacus/models/claude-3-7-sonnet-20250219.toml)
- **Weights:** Proprietary (API only) (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/abacus/models/claude-3-7-sonnet-20250219.toml)
- **Context window:** 200K (200,000 tokens) (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/abacus/models/claude-3-7-sonnet-20250219.toml)
- **Max output:** 64K tokens (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/abacus/models/claude-3-7-sonnet-20250219.toml)
- **Knowledge cutoff:** 31 Oct 2024 (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/abacus/models/claude-3-7-sonnet-20250219.toml)
- **Input:** Text, images and PDFs (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/abacus/models/claude-3-7-sonnet-20250219.toml)
- **Output:** Text (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/abacus/models/claude-3-7-sonnet-20250219.toml)
- **Reasoning mode:** Yes (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/abacus/models/claude-3-7-sonnet-20250219.toml)
- **Tool calling:** Yes (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/abacus/models/claude-3-7-sonnet-20250219.toml)

## API pricing (USD per 1M tokens)

| Provider | Input | Output | Cached input | Context |
|---|---|---|---|---|

## FAQ

### What is the context window of Claude Sonnet 3.7?

Claude Sonnet 3.7 has a context window of 200,000 tokens (200K) and can generate up to 64,000 tokens in a single response, according to models.dev.

### Is Claude Sonnet 3.7 open source?

No. Claude Sonnet 3.7 is a proprietary model; Anthropic has not released its weights.

### When was Claude Sonnet 3.7 released?

Anthropic released Claude Sonnet 3.7 on 19 Feb 2025, according to models.dev.

---
Data licensed CC BY 4.0. Cite as: AI Model Directory, "Claude Sonnet 3.7", https://www.aimodel.directory/models/claude-3-7-sonnet