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According to Anthropic, AWS Claude Opus 4.8 is Anthropic’s most capable model for complex reasoning, long-horizon agentic coding, and high-autonomy work.

Model details

ItemValueDescription
Model nameAWS Claude Opus 4.8The name of the model.
Model categoryPremiumThe category of the model: Standard or Premium.
API model nameaws__claude_4_8_opusThe name of the model that is used in the . The user must provide this exact name for the API to work.
ComplianceFedRAMP ModerateGovernment compliance frameworks and authorizations applicable to this model.
Hosting layerAmazon Web Services (AWS)The trusted organization that securely hosts the LLM.
Model providerAnthropicThe organization that provides this model.
Release dateMay 28th, 2026The release date for the model.
Knowledge cutoff dateJanuary 2026The date after which the model does not get any information updates.
Input context window1m tokensThe number of tokens supported by the input context window.
Maximum output tokens128k tokensThe number of tokens that can be generated by the model in a single request.
Empirical throughputNot specifiedThe number of tokens the model can generate per second.
Open sourceNoSpecifies if the model’s code is available for public use.

Additional documentation

For additional information, see official AWS Claude Opus 4.8 documentation.