Tools Model Security Capability claude-opus-4-8
Model record
Claude Opus 4.8: how it does on security work, and what it will answer
- Lab
- Anthropic
- Released
- 2026-05-28
- Access
- api
- Weights
- closed
- Safeguards
- Real-time safeguards; a possible fallback for higher-risk Opus requests
- Score rows
- 0
- Confidence
- CONFIRMED
What happened
Anthropic says some higher-risk cyber requests in Opus 5 or 5.5 can switch to Opus 4.8. The fallback model applies its own safeguards and can decline a request. General API fallback routes depend on the requested model and refusal category.
Refusal gate (CONFIRMED, observed 2026-10-05): A documented possible fallback for Opus 5 and 5.5; the destination retains safeguards..
Sources
- Anthropic, refusals and fallbackplatform.claude.com/docs/en/build-with-claude/refusals-and-f…
- Anthropic: model switching for Opussupport.claude.com/en/articles/16049681-why-claude-switched-…
On YFarmX
- Reference pageyfarmx.com/ai/llms/claude-opus-4-8/
One record from the Model Security Capability, maintained by the Security Desk.Data: CSV · JSON ·RSS · CC BY 4.0 with attribution to YFarmX.Tracker updated · 13 October 2026