AI model · Anthropic
Claude Sonnet 4
Model ID: anthropic/claude-sonnet-4
- Input
- $3 per 1M tokens
- Output
- $15 per 1M tokens
- Context
- 200K tokens at once
- Max output
- 64K tokens per reply
- Released
- 22 May 2025 Anthropic
What it can do
- YesReasoning
- YesTool calling
- YesImage input
- NoOpen weights
- NoFree to use
Takes image, text, file; gives text.
How its listing describes it
Claude Sonnet 4 significantly enhances the capabilities of its predecessor, Sonnet 3.7, excelling in both coding and reasoning tasks with improved precision and controllability. Achieving state-of-the-art performance on SWE-bench (72.7%),...
Sources
- Anthropic: Claude Sonnet 4 on OpenRouter — read 2 Oct 2026