Model comparison

Claude Opus 5 vs Claude Opus 5.5

Compare pricing, context windows and capabilities from OpenRouter. Open either model’s page to check availability and try it online.

anthropicClaude Opus 5anthropic/claude-opus-5anthropicClaude Opus 5.5newanthropic/claude-opus-5.5

Input price /M$5.00$4.001.3× cheaper

Output price /M$25.00$20.001.3× cheaper

Cache read /M$0.50$0.202.5× cheaper

Context window1M1M

Catalog date24 Jul 202622 Sept 20262 mo newer

What the same turn costs

Estimates from published token rates — stated token counts, not measurements.

Quick answer2K tokens in, 600 outClaude Opus 5$0.025Claude Opus 5.5$0.021.3× cheaper

10-slide deck build60K tokens in, 9K outClaude Opus 5$0.525Claude Opus 5.5$0.421.2× cheaper

150-page PDF read200K tokens in, 4K outClaude Opus 5$1.10Claude Opus 5.5$0.881.3× cheaper

Capabilities

Bothtool-usevisionreasoning

Claude Opus 5: text, image, file → text · Claude Opus 5.5: text, image, file → text

Which model should you use?

Start with the token cost for your workload, the context you need, and supported input types. A lower price or larger context window does not establish better answer quality.

To compare answers, open each model in a separate chat and use the same prompt. Token tables use published specs and estimates; any measured AA results above are a separate benchmark.

Try Claude Opus 5 — pricing and availability Try Claude Opus 5.5 — pricing and availability