Anthropic

Claude Sonnet 4.6

Claude Opus 4.6

Claude Opus 4.5

Claude Haiku 4.5

Claude Sonnet 4.5

Claude Opus 4.1

Claude Sonnet 4

Claude Opus 4

Claude 3.5 Opus

Agentic AI Foundation Launched with MCP

Anthropic, OpenAI, and Block co-found the Agentic AI Foundation. Model Context Protocol donated to Linux Foundation.

Claude Opus 4.5: New Frontier Model Released

Anthropic releases Claude Opus 4.5, the most capable Claude model to date with extended thinking capabilities, superior agentic performance, and industry-leading scores on SWE-bench Verified (53.2%). Features enhanced multi-step reasoning for complex coding and research tasks.

Claude Haiku 4.5 Released

Anthropic releases Claude Haiku 4.5, offering similar coding performance to Claude Sonnet 4 at one-third the cost and more than twice the speed.

Claude Sonnet 4 Gets 1M Token Context Window

Claude Sonnet 4.5 now supports up to 1 million token context window, making it ideal for processing entire codebases and long documents.

Claude Opus 4.1 with Enhanced Agentic Performance

Updated Claude Opus 4.1 is a drop-in upgrade with stronger agentic performance for complex, long-horizon coding tasks.

Claude Opus 4 and Sonnet 4: Best Coding Models

Anthropic releases Claude 4 family. Opus 4 achieves 72.5% on SWE-bench and 43.2% on Terminal-bench, becoming the world's best coding model.