Claude 3.7 Sonnet
by Anthropic
First hybrid reasoning model released February 2025, combining instant responses with visible extended thinking. Achieves state-of-the-art performance on SWE-bench and TAU-bench with significant improvements in coding and front-end development.
- First hybrid reasoning model integrating instant responses with extended thinking in one unified system
- State-of-the-art coding performance with 70.3% on SWE-bench Verified and exceptional frontend development
- Visible thought process in raw form with controllable thinking budgets up to 128K tokens
- 45% reduction in unnecessary refusals with improved understanding of harmful vs benign requests
- Enhanced agentic capabilities with improved computer use and multi-step task completion
Web Search
Search the web for current info.
Extended Thinking
Enhanced reasoning for complex tasks.
Web Fetch
Fetch and read full content from any URL.
Code Execution
Run Python & Bash code in a sandbox.
JSON Mode
Output responses in valid JSON format.
Model Information
Supported Formats
Claude Opus 4.8Anthropic's most capable model released May 2026. Hybrid reasoning model with a 1M token context window, stronger across coding, agentic tasks, and professional work over Opus 4.7. Features adaptive thinking via the effort parameter (defaults to high). Knowledge cutoff January 2026.
Claude Opus 4.7Anthropic's most capable generally available model with a step-change improvement in agentic coding over Claude Opus 4.6. Features 1M token context window, 128K max output, and adaptive thinking. Knowledge cutoff January 2026.
Claude Opus 4.6Anthropic's most intelligent model released February 2026. Features 1M token context window and 128K max output. Built for deep reasoning, long-horizon agentic tasks, and complex multi-step coding workflows. Supports extended thinking and adaptive thinking modes.