Claude Sonnet 4
RetiredRetired from the Claude API. Listed for anyone maintaining an older configuration.
Access details: Anthropic · Claude API
A pinned version. Requests to this ID always get the same model.
claude-sonnet-4-20250514Updated Sep 23, 2026
Capabilities & limits
- Context window
- 200K
- Maximum output
- 64K
- Image input
- Supported
- Tool calling
- Supported
- Structured output
- Unsupported
Pricing
USD / 1M tokens- Input
- No longer sold
- Output
- No longer sold
No longer sold on the Anthropic · Claude API.
Price history
Sep 13, 2026
Input No longer sold per million tokens
Sep 13, 2026
Output No longer sold per million tokens
Technical details
- Parameters
- Not published
- Active parameters
- Not published
- Architecture
- Not published
- Training / knowledge cutoff
- Mar 2025
- Input modalities
- Text, image
- Output modalities
- Text
From Anthropic
Official announcement ↗Release & lifecycle
- First available
- May 22, 2025
- deprecated
- Apr 14, 2026
- retired
- Jun 15, 2026