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Anthropic Premium · $18/month 132 tokens / message Balanced

Anthropic: Claude Opus 5.5 · Anthropic

Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work. It excels particularly at multi-step changes in large codebases and complex code analysis.

Advanced reasoning Complex coding Large codebase analysis

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About Anthropic: Claude Opus 5.5

Claude Opus 5.5 is Anthropic's flagship model for demanding reasoning, coding, and long-horizon agentic work. It excels particularly at multi-step changes in large codebases and complex code analysis.

Where it shines: Advanced reasoning · Complex coding · Large codebase analysis.

How to use Anthropic: Claude Opus 5.5

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  2. 2

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    Click the main button. Wait 2-30 seconds depending on the model and input size.

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Frequently asked questions

How much does it cost to use Anthropic: Claude Opus 5.5?

Anthropic: Claude Opus 5.5 is Premium: each use costs 132 tokens (about $0.66 in real cost to the provider). It requires a Premium plan ($18/month for 45,000 tokens) or large one-time packs. Designed for occasional professional use. The Pro plan does not unlock Premium models.

How many uses of Anthropic: Claude Opus 5.5 fit in the Premium plan?

Premium ($18/month) gives you 45,000 recurring tokens. At 132 tokens per use of Anthropic: Claude Opus 5.5, that's about 340 full uses per cycle. For occasional use, the one-shot packs may work out better, since they last up to a year from purchase.

What makes Anthropic: Claude Opus 5.5 special?

Anthropic trains its models for honesty and nuanced reasoning, so they admit when they don't know something instead of making it up. Its main strengths are: advanced reasoning, complex programming and analysis of long codebases. It accepts images as input (multimodal) as well as text, which is useful for describing screenshots, reading charts or solving problems from a photo.

How fast does Anthropic: Claude Opus 5.5 respond?

Anthropic: Claude Opus 5.5 has balanced speed: 5 to 15 seconds per response, neither the fastest nor the slowest in the catalogue. Actual time also depends on the length of your prompt and on how busy the datacenter is. Models with huge context windows take longer when you paste very long texts.

How do I use Anthropic: Claude Opus 5.5 on ia.gratis?

You can use Anthropic: Claude Opus 5.5 from /chat/ by selecting Anthropic: Claude Opus 5.5 in the picker, or through the REST API with `model=claude-opus-5-5` in the body of your POST. Quick summary: Claude Opus 5.5 is Anthropic's flagship model for advanced reasoning and code. The model's internal identifier is `claude-opus-5-5`, which you need when you integrate via the API.