Claude Sonnet 4.0
Key: claude-sonnet-4-0
Provider: Anthropic
Support: runnable
Capabilities
chat · reasoning · tools
Specifications
| Field | Value |
|---|---|
| Context window | 200 000 tokens |
| Input modalities | text |
| Output modalities | text |
When to use
The first Claude 4 Sonnet model. Still supported for lenses pinned to this version. Migrate to claude-sonnet-4-6 for improved performance on new lenses.