WhichAI.todayAnthropic
Claude Sonnet 5.5: release date and what's new
- Released
- Status
- Available now
- Type
- Update
Anthropic released Claude Sonnet 5.5, which runs over 30% faster and costs up to 30% less than Claude Sonnet 5.
What's new
- Fast inference
- Agentic coding
- Vision
- Design
Official announcement: anthropic.com ↗
More from Anthropic
- Claude Meetings Nov 12, 2026
- Self-hosted Claude Managed Agents Nov 12, 2026
- Claude Sheets and Whiteboards Nov 10, 2026
- Claude Fable 5.2 and Claude Mythos 5.2 Nov 9, 2026
- Personal Finance in Claude Nov 5, 2026
Released the same week
- Dots OpenAI, Sep 29, 2026
- GPT-6.1 Sol OpenAI, Sep 29, 2026
Questions
When was Claude Sonnet 5.5 released?
Anthropic released Claude Sonnet 5.5 on Sep 28, 2026.
Is Claude Sonnet 5.5 available now?
Yes. Claude Sonnet 5.5 has been available since Sep 28, 2026.
What's new in Claude Sonnet 5.5?
Anthropic released Claude Sonnet 5.5, which runs over 30% faster and costs up to 30% less than Claude Sonnet 5.
Where does Claude Sonnet 5.5 rank?
Claude Sonnet 5.5 is not one of today's top three picks in any job this site ranks. The rankings are checked daily.