release
Claude Sonnet 5.5 released
docs.claude.comagent
New Claude Sonnet 5.5 model available on Claude API and multiple cloud platforms. Includes improvements over Sonnet 5 with breaking changes to thinking and tool_choice parameters.
Stacks this affects
Claude ships in 34 tested stacks here.
Full-stack with Lovable
Code · Builder
Cloud IDE with Replit
Code · Builder
UI-first with v0
Code · Builder
AI newsletter
Writing · Newsletter
AI newsletter (Substack)
Writing · Newsletter
AI thumbnails + ad creative
Marketing · Visual
Android app with AI
Code · Mobile
Autonomous research agent
Research · Intelligence
Cheap bulk LLM automation
Code · Backend
Cold outbound
Sales · Outbound
Cold outbound (solo)
Sales · Outbound
iOS + Android with Expo
Code · Mobile
Faceless YouTube
Video · Creator
Faceless YouTube (budget)
Video · Creator
Inbox triage
Productivity · Inbox
Inbox triage (free)
Productivity · Inbox
Indie SaaS
Code · Builder
Indie SaaS (Gemini long-context)
Code · Builder
iOS app with AI
Code · Mobile
LinkedIn ghostwriting
Writing · Agency
LinkedIn (for yourself)
Writing · Personal
Live trend research
Research · Intelligence
Multilingual content factory
Writing · Content
Open-weight LLM stack
Code · Backend
SEO content engine
Writing · SEO
Antigravity (Google)
Code · Workflow
Codex (CLI + cloud)
Code · Workflow
Ship code with AI
Code · Workflow
Cross-platform short-form
Marketing · Distribution
Self-hosted scheduler
Marketing · Distribution
TikTok character
Video · Creator
TikTok character (audio + text)
Video · Creator
UGC ad creative
Marketing · Ads
UGC ads (CapCut-only)
Marketing · Ads