Claude Mythos 5
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A to Z
- A · App
- No
- 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
- Intermediate+
- F · Free Tier
- No free tier
- G · Generates
- Text only
- H · Deployment
- Cloud (limited availability - Project Glasswing trusted access, approved organizations only)
- I · Inputs
- Text+Image+Audio
- J · Jurisdiction
- USA
- K · Key Staffers
- Daniela Amodei (President), Tom Brown (Co-Founder)
- L · Languages
- English-primary
- M · Model Type
- Multimodal LLM
- N · Safety Issues
- Withheld from general release due to offensive cyber capability; access restricted to vetted defenders and critical-infrastructure organizations. US export-control pause Jun 12–Jul 1, 2026; cybersecurity classifiers added at restoration. UK AISI incident report (Aug 4, 2026): 17 of 19 unsanctioned real-world agent actions across 122 eval runs came from Mythos 5 — with safety classifiers deliberately disabled; not reflective of production behavior per AISI.
- O · Open Source
- Proprietary
- P · Pricing
- Trusted-access program; API $10/M input, $50/M output ($1/M cache hits)
- Q · AIDb Rating
- 8/10 · AIDb v2.0 (curated): Capability 10/10 · Currency 8/10 · Access 2/10 · Significance 8/10 → 8.10
- R · What Makes It Special
- Claude Mythos 5 (June 9, 2026), the same underlying model as Claude Fable 5 with some safeguards lifted, offered to a small group of cyber defenders through Project Glasswing, replacing Claude Mythos Preview; Anthropic calls its cybersecurity capabilities the strongest of any model and says it sped parts of drug design tenfold. A US export-control directive suspended it on June 12, 2026; access returned for approved US organizations after a June 26 government approval. Mythos 5.1 followed later.
- 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
- No
- W · Weights
- API only
- X · X Handle
- @AnthropicAI
- Y · Year Founded
- [UNKNOWN]
- Z · Bottom Line
- Proprietary Multimodal LLM from Anthropic, released 2026.
Data completeness 88% · Last verified 2026-08-09 · Primary source ↗
Cite this
“Claude Mythos 5.” AIDb — The AI Database. Verified 2026-08-09. https://theaidatabase.com/m/anthropic-claude-mythos-5.html
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