shutdown
Claude Sonnet 4.5 deprecated with November 30, 2026 retirement date
docs.claude.comagent
Claude Sonnet 4.5 (claude-sonnet-4-5-20250929) is being deprecated, with retirement scheduled for November 30, 2026. Developers should migrate to Claude Sonnet 5.5 to maintain compatibility and access the latest model capabilities.
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
More Claude
pricingClaude Team Premium rises from $100 to $125 per monthreleaseClaude Sonnet 5.5 launched on API and cloud platformsreleaseClaude Sonnet 5.5 releasedreleaseClaude Sonnet 5.5 released with adaptive thinking and thinking-control changesfeatureRefusal billing resumed for certain categories on Claude API