Product

Claude Opus 5.5: fiche technique, prix API et données

Name: Claude Opus 5.5
Brand: Anthropic

Updated 28 oct. 2026

Anthropic claude-opus-5-5 — drawn card, not a photograph of the product

AnthropicAI Models & LLMs

Context window: 1M tokens
Maximum output: 128k tokens
Input cost per 1M tokens: $4.00
Output cost per 1M tokens: $20.00
Knowledge cutoff: June 2026

You use it and pay per use through the vendor's API, per million tokens: there is no shop. The list prices are in the data sheet below.

Official page: platform.claude.com ↗

Data sheet · Claude Opus 5.5

Every figure is quoted from the vendor's official page, with the date we read it. If a row is missing, the source does not state it and we do not estimate it.

Memory and answer length

Context window: 1M tokensRank 8 of 21; What it means and the source
How much text the model keeps in view in a single request, question and answer included. It matters for long documents and whole code projects. A token is a fragment of a word.
platform.claude.comOpens the source in a new tab Oct 23, 2026
Maximum output: 128k tokensRank 3 of 16; What it means and the source
The longest answer it can write in one go: useful for reports, long code or translations of whole documents.
platform.claude.comOpens the source in a new tab Oct 23, 2026

API prices

Input cost per 1M tokens: $4.00Rank 16 of 21; What it means and the source
What it costs to have the model read a million tokens (your question, the documents, the code). It is the official list price, before discounts.
platform.claude.comOpens the source in a new tab Oct 23, 2026
Cached input cost per 1M tokens: $0.20Rank 12 of 20; What it means and the source
The reduced price when part of the request is identical to one sent recently, for example the same instructions or the same document: the vendor keeps it in memory and charges less for it.
platform.claude.comOpens the source in a new tab Oct 23, 2026
Output cost per 1M tokens: $20.00Rank 16 of 21; What it means and the source
What a million tokens written by the model cost. It usually costs more than the input and is the figure to watch when answers are long.
platform.claude.comOpens the source in a new tab Oct 23, 2026

Knowledge and abilities

Knowledge cutoff: June 2026Rank 1 of 9; What it means and the source
The month up to which the model's knowledge reaches. For more recent facts it needs web search or your documents.
platform.claude.comOpens the source in a new tab Oct 23, 2026
Reads images: Yes13 models out of 23; What it means and the source
The model can take images (photos, screenshots, charts) as well as text.
platform.claude.comOpens the source in a new tab Oct 23, 2026
Calls tools and functions: Yes12 models out of 23; What it means and the source
The model can call functions and tools (search, calculations, other applications) to take actions and not only write text: it matters for assistants and agents.
platform.claude.comOpens the source in a new tab Oct 23, 2026

Where it stands · Claude Opus 5.5

The same verified figures, next to those of the other catalogue models. Tap a model for the head-to-head.

Context windowRank 8 of 21 · higher is better

Maximum outputRank 3 of 16 · higher is better

Input cost per 1M tokensRank 16 of 21 · lower is better

Output cost per 1M tokensRank 16 of 21 · lower is better

Questions and answers

Claude Opus 5.5: how much does it cost through the API?

The official list price is $4.00 per 1M input tokens and $20.00 per 1M output tokens.

Claude Opus 5.5: how much text can it read at once?

The context window is 1M tokens. It can write answers of up to 128k tokens.

Claude Opus 5.5: how recent is its knowledge?

Its knowledge reaches June 2026. For more recent facts it needs web search or your documents.

L’essentiel

Sur Anthropic Claude Opus 5.5, la donnée qui compte vraiment est Fenêtre de contexte : 1M tokens. Je l’ai relevé chez Anthropic – Models overview. Parmi les 21 que j’ai vérifiés, 7 font mieux. L’autre chiffre à regarder est Coût par million de jetons en sortie : 20.

Les chiffres de Anthropic Claude Opus 5.5

Je les ai classés par importance, avec la valeur et la position face aux autres que j’ai vérifiés.

Fenêtre de contexte : 1M tokens. Position 8 sur les 21 que j’ai comparés.

Coût par million de jetons en sortie : 20. Position 16 sur les 21 que j’ai comparés.

Coût par million de jetons en entrée : 4. Position 16 sur les 21 que j’ai comparés.

Appelle des outils et des fonctions : 1. C’est la meilleure valeur parmi les 12 que j’ai comparés.

Connaissances à jour jusqu’à : Jun 2026. C’est la meilleure valeur parmi les 9 que j’ai comparés.

Coût d’entrée en cache par 1M de tokens (USD) : 0.2. Position 8 sur les 20 que j’ai comparés.

Subject illustration: Illustration of an application (illustrative image, not a photo of the product)

À qui il s’adresse

Choisis-le si Appelle des outils et des fonctions est ta priorité : 1, et aucun de ceux que j’ai vérifiés ne fait mieux.

Il te convient si tu cherches Connaissances à jour jusqu’à : Jun 2026.

Regarde ailleurs si ce qui compte pour toi est Fenêtre de contexte : ici c’est 1M tokens, et 7 produits font mieux.

Pour aller plus loin

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Sources

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Reviews and tests

Anthropic Claude Opus 5.5

Reviews and tests

Reviews are not available yet.

What changed

28 oct. 2026Page updated

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