Model by Anthropic

Claude Opus 5

Claude Opus 5 is Anthropic's former flagship for long coding and agent work, and it suits teams that already pinned it and want steady behaviour.

Checked 2026-11-05

Claude Opus 5 is Anthropic's former flagship for long coding and agent work, and it suits teams that already pinned it and want steady behaviour. Anthropic released it on 24 July 2026 and now lists it as a legacy model, with Claude Opus 5.5 as the current Opus. The context window is 1 million tokens, maximum output is 128 thousand tokens, and it takes text and images and returns text. The reliable knowledge cutoff is May 2026. Price is $5 per million input tokens and $25 per million output tokens, with a 50 percent discount on the batch API. Anthropic says it will not retire it sooner than 24 July 2027. You reach it through the Claude API as claude-opus-5, and on Amazon Bedrock, Microsoft Foundry and Google Cloud. The catch: Anthropic's cyber safeguards block binary scanning, penetration testing and exploit generation, and flagged requests in Claude Code fall back to Opus 4.8 by default. Anthropic also says it trails its Mythos 5 model on biology research and offensive security. We would use it only where an existing pipeline is tuned to it. For new work the 5.5 model is cheaper at $4 and $20. Figures come from Anthropic's announcement and model page, plus OpenRouter. We have not run it ourselves.

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Questions

What is the context window of Claude Opus 5?

1,000,000 tokens, with up to 128,000 tokens of output.

How much does Claude Opus 5 cost?

$5 per million input tokens and $25 per million output tokens, checked 31 October 2026.

Can I run Claude Opus 5 on my own hardware?

No. The weights are not published, so you use it through the maker's API or a hosting provider.

Who makes Claude Opus 5?

Anthropic makes it, and released it on 24 July 2026.

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Where you can run it

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    OpenRouter routes more than 600 models through one API key.

    • Model gateway (router)
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