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Claude Opus 4
Model family: claude-opus-4
Claude Opus 4 — the first Opus 4 flagship, now several generations behind.
Identity
- Creator
- Anthropic
- Model family
- claude-opus-4
- Release date
- 2025-05-21
Technical specs
- Parameter count
- The first Opus 4 flagship. A strong frontier model on release; now several generations behind.
- Context window
- 200K tokens
- Modalities
- Image Input
- Text
- Primary capabilities
- Chat
- Coding
- Function Calling
- Instruction Following
- Long Context
- Reasoning
- Tool Use
- Vision
License
- License
- Anthropic Commercial Terms of Service
- Commercial use
- Allowed
- Terms
- Modification ✗
- Redistribution ✗
- Attribution ✗
Access
- Openness
- Closed Api
- Access methods
- Api First Party
- Api Third Party
- Hosted Chat Ui
- Cost tier
- Paid Api
Sources
- llm
- closed-api
- frontier
- multimodal
- us-based
- proprietary