Claude Opus 5.5
Open in the interactive archive →
Download the covers: Floppy card · VHS cover · Vinyl cover
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
- 2026
- E · Expertise
- Beginner (app available)
- F · Free Tier
- No free tier
- G · Generates
- Text only
- H · Deployment
- Cloud (Claude apps + Claude Platform API; Amazon Web Services, Google Cloud, Microsoft Azure)
- I · Inputs
- Text
- 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
- LLM
- N · Safety Issues
- Per Anthropic, the model often suspects it is being evaluated, which limits alignment-audit confidence; it ships with Fable 5.1-class safeguards that reroute most cybersecurity tasks to Opus 4.8 and gate some biology work behind a Life Sciences Verification Program (system card: anthropic.com/claude-opus-5-5-system-card).
- O · Open Source
- Proprietary
- P · Pricing
- API: $4/M input, $20/M output; cache reads $0.20/M, cache writes $5/M; fast mode $8/M input, $40/M output (Claude Code and Claude Platform).
- Q · AIDb Rating
- 9/10 · AIDb v2.0 (curated): Capability 9.5/10 · Currency 10/10 · Access 5/10 · Significance 8/10 → 8.70
- R · What Makes It Special
- First model in Anthropic's Claude 5.5 family. Anthropic says it performs at Claude Fable 5.1 level on most work while costing about 40% less than Opus 5 on typical workloads, with >30% faster output. Launch results: Terminal-Bench 4.0 66.4%, GDPval-AA v2.1 1846 Elo, OSWorld 2.0 81.8% (partial), Humanity's Last Exam 67.7% (with tools). API model claude-opus-5-5; thinking cannot be disabled; zero data retention available.
- 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 LLM from Anthropic, released 2026.
Data completeness 88% · Last verified 2026-09-25 · Primary source ↗
Cite this
“Claude Opus 5.5.” AIDb — The AI Database. Verified 2026-09-25. https://theaidatabase.com/m/anthropic-claude-opus-5-5.html
More from Anthropic
Claude · Claude 2 · Claude 2.1 · Claude 3 · Claude 3 Haiku · Claude 3 Opus · Claude 3 Sonnet · Claude 3.5