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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 Provider Profile APIs.io OpenAPI GitHub

Anthropic Models API is one of 29 APIs that Anthropic publishes on the APIs.io network, described by a machine-readable OpenAPI specification.

This API exposes 3 JSON Schema definitions.

Tagged areas include Artificial Intelligence and Models. The published artifact set on APIs.io includes API documentation, an OpenAPI specification, and 3 JSON Schemas.

This API exposes 4 operations across 4 paths, and defines 37 schemas. It is described by OpenAPI 3.2.0.

Requests are made against a single base URL, https://api.anthropic.com.

4 operations 4 paths 37 schemas 4 GET

Metadata

The identity and technical contract details declared by the specification.

Specification
OpenAPI 3.2.0
Base URL
https://api.anthropic.com/v1
Resource Areas
1

Paths & Operations 4

Across 4 paths, the API surfaces 4 operations — 4 GET. Each is listed below with its method, path, parameters, and response codes.

Models 4
GET
/v1/models
List Models
models_list 6 params → 2004XX
GET
/v1/models/{model_id}
Get a Model
models_get 4 params → 2004XX
GET
/v1/models/{model_id}?beta=true
Get a Model
beta_models_get 4 params → 2004XX
GET
/v1/models?beta=true
List Models
beta_models_list 6 params → 2004XX

Schemas 37

The contract defines 37 schemas that model the data the API accepts and returns. The most detailed are BetaModelCapabilities (9 properties), ModelCapabilities (9 properties), BetaModelInfo (8 properties), ModelInfo (7 properties). Each schema is shown below with its type and property counts.

AuthenticationError
object
2 properties 2 required
BetaInvalidRequestError
object
2 properties 2 required
BetaPermissionError
object
2 properties 2 required
BetaRateLimitError
object
2 properties 2 required
BetaThinkingCapability
object
Thinking capability details.
2 properties 2 required
InvalidRequestError
object
2 properties 2 required
ModelCapabilities
object
Model capability information.
9 properties 9 required
ListResponse_ModelInfo_
object
4 properties 4 required
EffortCapability
object
Effort (reasoningeffort) capability details.
6 properties 6 required
BetaNotFoundError
object
2 properties 2 required
BetaThinkingTypes
object
Supported thinking type configurations.
2 properties 2 required
BetaOverloadedError
object
2 properties 2 required
ThinkingCapability
object
Thinking capability details.
2 properties 2 required
BetaContextManagementCapability
object
Context management capability details.
4 properties 4 required
BetaCapabilitySupport
object
Indicates whether a capability is supported.
1 property 1 required
BetaAuthenticationError
object
2 properties 2 required
APIError
object
2 properties 2 required
PermissionError
object
2 properties 2 required
ThinkingTypes
object
Supported thinking type configurations.
2 properties 2 required
GatewayTimeoutError
object
2 properties 2 required
BetaBillingError
object
2 properties 2 required
BetaGatewayTimeoutError
object
2 properties 2 required
BetaListResponse_ModelInfo_
object
4 properties 4 required
BetaModelInfo
object
8 properties 8 required
BetaAPIError
object
2 properties 2 required
ModelInfo
object
7 properties 7 required
BillingError
object
2 properties 2 required
CapabilitySupport
object
Indicates whether a capability is supported.
1 property 1 required
BetaModelCapabilities
object
Model capability information.
9 properties 9 required
AnthropicBeta
ErrorResponse
object
3 properties 3 required
BetaEffortCapability
object
Effort (reasoningeffort) capability details.
6 properties 6 required
RateLimitError
object
2 properties 2 required
OverloadedError
object
2 properties 2 required
ContextManagementCapability
object
Context management capability details.
4 properties 4 required
NotFoundError
object
2 properties 2 required
BetaErrorResponse
object
3 properties 3 required

Specification

The full machine-readable OpenAPI contract behind this narrative.

Source

anthropic-models-api-openapi.yml Raw ↑

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#Artificial Intelligence#Models
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API Details
ID
anthropic:anthropic-models-api
Base URL
https://api.anthropic.com/v1
Docs
https://docs.anthropic.com/en/api/models-list
Provider
Anthropic
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