Anthropic: Claude Opus 5.5
Analysis Summary
Claude Opus 5.5 is Anthropic's flagship model and has leading measured reasoning capability. Its one-million-token context, vision, file input, tool use, and function calling give it a broad operating range for complex tasks that involve both documents and action through connected tools.
For agency workflows, it is a strong candidate for long-document analysis, sophisticated client-facing content, and multi-step work where accuracy matters. The combination of vision and tool access also supports workflows that move between interpreting supplied material and taking actions. The provided data does not include coding-specific or instruction-following benchmarks, so those capabilities should be validated against your own tasks before making it the default coding agent.
Listed input pricing is $4 and output pricing is $20, making it a premium choice. Use it for high-stakes work where answer quality justifies the cost, and route routine volume elsewhere.
Assessed September 23, 2026
Editorial notes
Claude Opus 5.5 combines leading measured reasoning with a 1M-token context, vision, and tool use, making it suited to complex client work; premium output pricing favors high-value tasks.
The DFO score ranks models on the Artificial Analysis Intelligence Index and is refreshed as new models launch. The write-up and verdict are our own. Feedback?
DFO Verdict
Claude Opus 5.5 combines leading measured reasoning with a 1M-token context, vision, and tool use, making it suited to complex client work; premium output pricing favors high-value tasks.
Benchmarks
Artificial Analysis data refreshed Sep 24, 2026. Arena ratings from the Sep 13, 2026 text leaderboard, with style control.
Artificial Analysis has not published coding or agentic results for Anthropic: Claude Opus 5.5 yet. Until it does, the model sits below tested models on the Coding and AI Agents lists.
This model was released recently. Benchmark figures are preliminary and are likely to be updated as independent testing is finalised.
How Anthropic: Claude Opus 5.5 compares
Anthropic: Claude Opus 5.5 ranks #1 of 428 AI models we track for overall intelligence. Its 1M-token context window is larger than 86% of the models we list. At $4.00 per million input tokens it is cheaper than 6% of comparable models.
Dark bar = input · light bar = output, scaled to the priciest peer.
1M tokens ≈ 8 full-length novels or ~2,500 pages of business documents in a single request.
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $4.00 | $0.004000 |
| Output | $20.00 | $0.020000 |
What would Anthropic: Claude Opus 5.5 cost your business?
Pick the job that looks most like yours, then fine-tune with the sliders. Estimates update live.
A website chatbot handling around 100 customer conversations a day, a few short messages each.
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These numbers get smaller with the right architecture.
We route routine calls to cheap models and save Anthropic: Claude Opus 5.5 for the hard ones. Most clients cut their estimate by 60-80%.
Talk to our teamAbout Anthropic: Claude Opus 5.5
Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work, succeeding Claude Opus 5. It is particularly strong at multi-step changes in large codebases, code..
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Frequently asked questions about Anthropic: Claude Opus 5.5
How much does Anthropic: Claude Opus 5.5 cost?
Anthropic: Claude Opus 5.5 costs $4.00 per million input tokens and $20.00 per million output tokens.
What is the context window of Anthropic: Claude Opus 5.5?
Anthropic: Claude Opus 5.5 has a context window of 1,000,000 tokens (1M).
What can Anthropic: Claude Opus 5.5 do?
Anthropic: Claude Opus 5.5 supports image/vision input, tool use, and function calling.
Who created Anthropic: Claude Opus 5.5?
Anthropic: Claude Opus 5.5 is developed by Anthropic and was released on September 22, 2026.