Anthropic

Anthropic Models API

List and inspect Claude models including Opus 4.7, Sonnet 4.6, and Haiku 4.5. The response includes max_input_tokens, max_tokens, and a capabilities object for every model so clients can discover model properties programmatically.

Documentation GitHub OpenAPI

Operations 4

Each operation below carries the questions people ask an LLM about it and the instructions they give an agent to run it. Generated by API Evangelist overlay

GET /v1/models List available Claude models · List Models #

Ask an LLM

“Which Claude models can I use with my API key right now?”

“What's the newest model available on the API?”

Tell an agent

List the available models.

Show the {limit} most recently released models.

GET /v1/models/{model_id} Look up a model or resolve an alias · Get a Model #

Ask an LLM

“What model ID does a model alias currently point to?”

“Can I get details on one specific Claude model?”

Tell an agent

Get model {model_id}.

Resolve the alias {model_id} to a model ID.

GET /v1/models/{model_id}?beta=true Look up a model via the beta endpoint · Get a Model #

Ask an LLM

“Can I resolve a model alias through the ?beta=true models endpoint?”

“Using the beta models route, what details come back for one model?”

Tell an agent

Get model {model_id} via the beta models endpoint.

Resolve alias {model_id} with the ?beta=true lookup.

GET /v1/models?beta=true List models via the beta endpoint · List Models #

Ask an LLM

“Which models does the ?beta=true model listing return?”

“Can I list models with beta features enabled?”

Tell an agent

List models via the beta models endpoint.

Page through beta model listings after {after_id}.

Documentation

📖

Documentation

https://docs.anthropic.com/en/api/models-list

Specifications

⚙

OpenAPI

https://raw.githubusercontent.com/api-evangelist/anthropic/refs/heads/main/openapi/anthropic-models-api-openapi.yml

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