Skip to content
OpenRouterOpenRouter
© 2026 OpenRouter, Inc

Product

  • Chat
  • Rankings
  • Models
  • Providers
  • Pricing
  • Enterprise

Company

  • About
  • Announcements
  • CareersHiring
  • Partners
  • Privacy
  • Terms of Service
  • Support
  • State of AI

Developer

  • Documentation
  • API Reference
  • SDK
  • Status

Connect

  • Discord
  • GitHub
  • LinkedIn
  • X
  • YouTube

Anthropic: Claude Opus 4.1

anthropic/claude-opus-4.1

Created Aug 5, 2025200,000 context
$15/M input tokens$75/M output tokens

Claude Opus 4.1 is an updated version of Anthropic’s flagship model, offering improved performance in coding, reasoning, and agentic tasks. It achieves 74.5% on SWE-bench Verified and shows notable gains in multi-file code refactoring, debugging precision, and detail-oriented reasoning. The model supports extended thinking up to 64K tokens and is optimized for tasks involving research, data analysis, and tool-assisted reasoning.

Recent activity on Claude Opus 4.1

Total usage per day on OpenRouter

Prompt
68.2M
Completion
3.2M
Reasoning
47K

Prompt tokens measure input size. Reasoning tokens show internal thinking before a response. Completion tokens reflect total output length.