Anthropic releases Claude Opus 4.5
A half-step 4.5 upgrade to Opus that strengthens deep reasoning while maintaining long-form generation quality.
CL1 English report
MODEL
Claude Opus 4.5
- Release date:
- 2025-11-24
- Parameters:
- Unknown
- Architecture:
- Autoregressive Transformer
- Legacy modality:
- Text
- Openness:
- Closed-source
Related English reports
English reports linked to this entity will appear here as their translations are published.
AI-generated · reviewedImpact 78/100