Models
For each AI model version: the capability levels its provider states it reached, the outside testers who tested it, and the incidents that name it.
Also: compare models side by side · statements that a capability level was crossed · providers · practices providers document · safety news.
12 of 78 model versions
| Model | Levels the provider states it reached | Outside testers | Incidents naming it |
|---|---|---|---|
| Claude Opus 5.5 Anthropic · 22 September 2026 |
CB-1 | 10a Labs, CAISI (NIST), Dyno Therapeutics, Epoch AI and 5 more, Academic | None |
| Claude Opus 5 Anthropic · 24 July 2026 |
CB-1 | Dyno Therapeutics, Epoch AI, Gray Swan, Hugging Face and 3 more, Academic | None |
| Claude Mythos 5 Anthropic |
None stated | Dyno Therapeutics, Epoch AI, Frontier Design, Gray Swan and 3 more | 7 incidents AI acting on its own |
| Claude Opus 4.8 Anthropic · 28 May 2026 |
None stated | Andon Labs, Apollo Research, Dyno Therapeutics, Epoch AI and 6 more, Academic | None |
| Claude Opus 4.7 Anthropic · 16 April 2026 |
None stated | Apollo Research, Dyno Therapeutics, METR, RAND (CAST / Project Canary) and 5 more | None |
| Claude Mythos Preview Anthropic · 7 April 2026 |
None stated | Andon Labs, Dyno Therapeutics, Epoch AI, Gray Swan and 3 more | None |
| Claude Sonnet 4.6 Anthropic · 17 February 2026 |
None stated | Andon Labs, Gray Swan, Redwood Research, SecureBio and 2 more | None |
| Claude Opus 4.6 Anthropic |
ASL-3 | Andon Labs, Apollo Research, CAISI (NIST), Epoch AI and 6 more | 1 incident AI acting on its own |
| Claude Opus 4.5 Anthropic |
None stated | Epoch AI, FAR.AI, Gray Swan, METR and 3 more | None |
| Claude Haiku 4.5 Anthropic |
None stated | Apollo Research, Gray Swan, SecureBio, Transluce | 1 incident AI failing in normal use |
| Claude Sonnet 4.5 Anthropic |
None stated | Irregular, METR, Transluce, UK AI Security Institute and 1 more, Academic | 1 incident AI attacked |
| Claude Opus 4 Anthropic |
None stated | CAISI (NIST), METR, OWASP GenAI Security Project, Transluce and 1 more | None |