Claude Opus 4.1

Anthropic· released 5 Aug 2025

anthropic/claude-opus-4.1

Input / 1M tokens: $15
Output / 1M tokens: $75

Context window200K tokens

Longest answer: 32K tokens

reads imagereads textreads filetool callingvisionreasoning

About

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...

Details

Lab: Anthropicopenrouter.ai · 3 Oct 2026
Context: 200Kopenrouter.ai · 3 Oct 2026
Input price: $15 / 1Mopenrouter.ai · 3 Oct 2026
Output price: $75 / 1Mopenrouter.ai · 3 Oct 2026
Max output: 32,000 tokensopenrouter.ai · 3 Oct 2026
Inputs: image, text, fileopenrouter.ai · 3 Oct 2026
Open weights: Noopenrouter.ai · 3 Oct 2026

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Sources

openrouter.ai/anthropic/claude-opus-4.1· checked 3 Oct 2026