What was announced at the Anthropic events 2025 keynote?

Claude Opus 4 (GA), Claude Sonnet 4 (GA), Claude Code (GA), Code execution tool (GA), Extended thinking with tool use (Preview), Model Context Protocol adoption (Announced).

What are the key takeaways from the Anthropic events 2025 keynote?

Mike Krieger opened Code with Claude, Anthropic's first developer conference, in front of a live audience Dario Amodei announced Claude Opus 4 and Claude Sonnet 4 were releasing live across all Anthropic products Claude 4 models add near-instant responses alongside an extended thinking mode for harder problems Amazon's Alexa team used Claude to prototype new assistant functionality ahead of the Alexa+ launch

Who gave the Anthropic events 2025 keynote?

Mike Krieger, Dario Amodei, on 2025-05-22 in San Francisco.

Anthropic events 2025

Anthropic 2025 keynoteMike Krieger, Dario Amodei, May 22, 2025

Thursday, May 22, 20251h 40mChecked 2026-09-24

Watch on YouTube Official recap

At Anthropic's first developer conference, Mike Krieger and Dario Amodei launched Claude Opus 4 and Claude Sonnet 4 and detailed MCP, Claude Code, and a new code execution tool.

Where each takeaway is said1:40:20

1 2 3 4 5 6 7

1Mike Krieger opened Code with Claude, Anthropic's first developer conference, in front of a live audience27:19
2Dario Amodei announced Claude Opus 4 and Claude Sonnet 4 were releasing live across all Anthropic products29:35
3Claude 4 models add near-instant responses alongside an extended thinking mode for harder problems34:28
4Amazon's Alexa team used Claude to prototype new assistant functionality ahead of the Alexa+ launch37:18
5A new code execution tool in the API lets Claude write and run code directly during a conversation40:59
6Claude Code can now run inside GitHub workflows using the Claude Code SDK44:29
7Anthropic said it created MCP as a universal translator between AI models and external tools, and that Microsoft is building MCP into its Build keynote plans52:55

Announced

4 available the same day

Claude Opus 4Flagship model, leads SWE-bench at 72.5%GA
Claude Sonnet 4Mid-tier model, state of the art 72.7% on SWE-benchGA
Claude CodeExpanded to general availability with IDE integrationsGA
Code execution toolAPI tool letting Claude execute code directlyGA
Extended thinking with tool useBeta reasoning mode with web search during processingPreview
Model Context Protocol adoptionAnthropic formalizing MCP as an open standardAnnounced

On stage

Sources

Companies named

Summaries of official keynote videos and recaps; watch the source for exact wording. Logos via logo.dev; trademarks belong to their owners.