Claude Opus 4.1

Available

AnthropicFrontierProprietary

Anthropic's August 2025 Opus point release, focused on stronger coding, reasoning, and agentic reliability over Claude Opus 4. Proprietary API model with text, vision, and code capabilities.

Official page ↗Model card ↗

Specifications

License: Proprietary
Weights: Not released
Architecture: unknown
Parameters: Undisclosed
Context window: 200K tokens
Max output: —
Knowledge cutoff: —
Price (in / out, $/M): $15 / $75
Modalities: TextVisionCode

Benchmarks

No benchmark scores recorded yet. Spotted some? Submit a correction.

Vendor-reported figures are claims until independently verified. See methodology.