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 were the highlights of the Anthropic events 2025 keynote?

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. 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.

Who gave the Anthropic events 2025 keynote?

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

Anthropic events 2025: Code with Claude Opening Keynote

Mike Krieger · Dario Amodei · May 22, 2025 · 1h 40m · San Francisco

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.

Key themes: Models, AI coding, Agents · AI-written summary from the published transcript

Where each highlight is said1:40:20

1 2 3 4 5 6 7

27:19
Mike Krieger opened Code with Claude, Anthropic's first developer conference, in front of a live audience
29:35
Dario Amodei announced Claude Opus 4 and Claude Sonnet 4 were releasing live across all Anthropic products
34:28
Claude 4 models add near-instant responses alongside an extended thinking mode for harder problems
37:18
Amazon's Alexa team used Claude to prototype new assistant functionality ahead of the Alexa+ launch
40:59
A new code execution tool in the API lets Claude write and run code directly during a conversation
44:29
Claude Code can now run inside GitHub workflows using the Claude Code SDK
52:55
Anthropic said it created MCP as a universal translator between AI models and external tools, and that Microsoft is building MCP into its Build keynote plans

Announced

4 available the same day

GAClaude Opus 4Flagship model, leads SWE-bench at 72.5%

GAClaude Sonnet 4Mid-tier model, state of the art 72.7% on SWE-bench

GAClaude CodeExpanded to general availability with IDE integrations

GACode execution toolAPI tool letting Claude execute code directly

PreviewExtended thinking with tool useBeta reasoning mode with web search during processing

AnnouncedModel Context Protocol adoptionAnthropic formalizing MCP as an open standard

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About this keynote

Keynote page: www.youtube.com/watch?v=EvtPBaaykdo

On stage