Anthropic'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.
- Most intelligent Claude model with 1M token context window for comprehensive analysis of massive codebases and documents
- 128K maximum output tokens enabling extensive code generation, detailed reports, and thorough explanations
- Best-in-class performance for agents, coding, deep reasoning, and long-horizon autonomous tasks
- Extended and adaptive thinking modes for sophisticated reasoning across complex multi-step problems
- Enhanced security and alignment with advanced prompt injection resistance and safety protections
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 Sonnet 4.6Best balance of speed and intelligence released February 2026. Features 1M token context window with full upgrades across coding, computer use, long-context reasoning, and agent planning. Improved agentic search with lower token consumption.