Claude Opus 4.1 — reviews, specs & pricing

Anthropic's most capable model for complex reasoning and coding.

Summary

Claude Opus 4.1 is Anthropic's top-tier model, excelling at agentic coding, complex reasoning and long-horizon tasks. It supports a 200k context window and vision input. It's designed for the most demanding enterprise workloads.

Sample use case

Used for advanced coding agents, research analysis, and enterprise-grade reasoning tasks. Suited for tasks requiring maximum quality regardless of cost.

Specifications

  • Provider: anthropic
  • License: closed
  • Context: 200k tokens
  • Input price: $15/M tok
  • Output price: $75/M tok
  • Released: 2025-08-05

Pros

  • Top-tier reasoning/coding
  • Strong safety alignment
  • Large context

Cons

  • Highest cost tier
  • Closed weights
  • Higher latency

Average rating 0.0 from 0 community reviews on Reviuws.

Frequently asked questions

What is Claude Opus 4.1?

Claude Opus 4.1 is Anthropic's top-tier model, excelling at agentic coding, complex reasoning and long-horizon tasks. It supports a 200k context window and vision input. It's designed for the most demanding enterprise workloads.

How much does Claude Opus 4.1 cost?

Claude Opus 4.1 costs $15 per million input tokens and $75 per million output tokens.

Is Claude Opus 4.1 open source?

Claude Opus 4.1 is released under the closed license.