Model · Multimodal language model
Claude Opus 4.6
A pinned multimodal Claude release in legacy status with a 1M-token context, available through Anthropic's developer API and documented third-party cloud platforms, without downloadable model weights.
- Developer
- Anthropic
- Distribution
- Developer API · Third-party hosting
- Artifact licensing
- Proprietary access
- License scope
- Reviewed release artifacts and mandatory terms; not an assessment of training code or training data openness.
- Licenses
- Anthropic Commercial Terms of Service
- Boundary
- This record represents the Claude Opus 4.6 release identified by the dateless pinned ID claude-opus-4-6, which Anthropic documents as a single fixed snapshot rather than an alias. Anthropic's API, Amazon Bedrock, Google Cloud, Microsoft Foundry, Claude Platform on AWS, Claude applications, and other Opus releases remain separate service or product boundaries.
Risk statements
“AI R&D-4” · Precautionary
As a result, while we do not believe Claude Opus 4.6 meets the threshold for ASL-4 autonomy safeguards, we find ourselves in a gray zone where clean rule-out is difficult and the margin to the threshold is unclear. We expect with high probability that models in the near future could cross this threshold. Given this uncertainty, we have taken a cautious approach, similarly to how we approached the ASL-3 CBRN threshold for Claude Opus 4, and have chosen to prepare and publish a Sabotage Risk Report for Claude Opus 4.6, consistent with the RSP’s commitment to developing an affirmative case addressing misalignment risks for the AI R&D-4 threshold.
- Risk areas
- Autonomy
- Covers
- The model itself
Read the developer's statement ↗ · 2026-10-07 · Research confidence: Medium
Anthropic names this release against “AI R&D-4” in autonomy capability, as a precaution. The statement covers the model itself. This is the developer's own statement, not an Atlas risk rating.
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