Claude Sonnet 4.5
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A to Z
- A · App
- Yes
- B · Built By
- Anthropic
- C · CEO & Politics
- Dario Amodei — Pro-AI-regulation; first-ever $1M personal donation to bipartisan Public First super PAC (Jul 2026); otherwise avoids partisan politics
- D · Date
- 2025
- E · Expertise
- Beginner (app available)
- F · Free Tier
- Yes
- G · Generates
- Text only
- H · Deployment
- Cloud only (proprietary)
- I · Inputs
- Text+Image+Audio
- J · Jurisdiction
- USA
- K · Key Staffers
- Daniela Amodei (President & Co-Founder), Jack Clark (Co-Founder, Policy), Tom Brown (Co-Founder), Sam McCandlish (Co-Founder), Jared Kaplan (Co-Founder, Chief Science Officer), Mike Krieger (Labs), Paul Smith (CCO)
- L · Languages
- English-primary
- M · Model Type
- Multimodal LLM
- N · Safety Issues
- None reported
- O · Open Source
- Proprietary
- P · Pricing
- Claude API: $3/M input, $15/M output; deprecated, retiring Nov 30, 2026
- Q · AIDb Rating
- 7/10 · AIDb v2.0 (curated): Capability 7.5/10 · Currency 4/10 · Access 7/10 · Significance 6/10 → 6.50
- R · What Makes It Special
- Anthropic's Claude Sonnet 4.5 (September 29, 2025), which Anthropic called the best coding model in the world and the best at using computers at launch: state of the art on SWE-bench Verified, able to stay on complex multi-step tasks for more than 30 hours, and leading OSWorld at 61.4% (up from Sonnet 4's 42.2%); it shipped with Claude Code checkpoints, a VS Code extension, the Claude Agent SDK and API memory and context-editing tools, at $3/$15 per million tokens. Retiring November 30, 2026.
- S · Stock / Status
- Private ($380B valuation, Feb 2026); confidentially filed for IPO Jun 1, 2026
- T · Training Cutoff
- [UNKNOWN]
- U · Users
- [UNKNOWN]
- V · Voice Chat
- Yes
- W · Weights
- API only
- X · X Handle
- @AnthropicAI
- Y · Year Founded
- [UNKNOWN]
- Z · Bottom Line
- Proprietary Multimodal LLM from Anthropic, released 2025.
Data completeness 88% · Last verified 2026-08-09 · Primary source ↗
Cite this
“Claude Sonnet 4.5.” AIDb — The AI Database. Verified 2026-08-09. https://theaidatabase.com/m/claude-sonnet-4-5-anthropic.html
More from Anthropic
Claude · Claude 2 · Claude 2.1 · Claude 3 · Claude 3 Haiku · Claude 3 Opus · Claude 3 Sonnet · Claude 3.5