Changes to List Models

deleted the header request parameter x-api-key

deleted the header request parameter anthropic-beta with deprecation

added the enum value webhooks-2026-10-07 to the property items/anyOf[subschema #2]/ of the header request parameter anthropic-beta

added the required property data/items/capabilities/anyOf[subschema #1: ModelCapabilities]/thinking/types/between_tools to the response with the 200 status

added the enum value telemetry-destinations-2026-08-11 to the property items/anyOf[subschema #2]/ of the header request parameter anthropic-beta

the error response's property type changed from no type to object for status 400

added the optional property error/details to the response with the 400 status

removed discriminator from error response property for the response status 400

removed InvalidRequestError AuthenticationError BillingError PermissionError NotFoundError RateLimitError GatewayTimeoutError APIError OverloadedError from the error response property oneOf list for the response status 400

added the required property error/message to the response with the 400 status

added the required property error/type to the response with the 400 status

added the new optional query request parameter lifecycle[]

added the required property data/items/deprecated_at to the response with the 200 status

added the required property data/items/lifecycle to the response with the 200 status

added the required property data/items/retires_at to the response with the 200 status

added the required property data/items/capabilities/anyOf[subschema #1: ModelCapabilities]/server_tools to the response with the 200 status

added the required property data/items/capabilities/anyOf[subschema #1: ModelCapabilities]/thinking/types/disabled to the response with the 200 status

added the required property data/items/line to the response with the 200 status

added the enum value spend-limit-reads-2026-09-26 to the property items/anyOf[subschema #2]/ of the header request parameter anthropic-beta

added the enum value ce-plugins-2026-09-01 to the property items/anyOf[subschema #2]/ of the header request parameter anthropic-beta

header request parameter anthropic-beta was deprecated

added the enum value inline-tools-2026-09-15 to the property items/anyOf[subschema #2]/ of the header request parameter anthropic-beta

added the enum value mcp-client-2026-09-15 to the property items/anyOf[subschema #2]/ of the header request parameter anthropic-beta

for the header request parameter anthropic-beta, the type changed from string to array

for the header request parameter anthropic-beta, the type of property items/ changed from string to no type

added the new optional header request parameter anthropic-workspace-id

added the non-success response with the status 400

added the non-success response with the status 401

added the non-success response with the status 403

added the non-success response with the status 404

added the non-success response with the status 408

added the non-success response with the status 409

added the non-success response with the status 412

added the non-success response with the status 413

added the non-success response with the status 429

added the non-success response with the status 431

added the non-success response with the status 499

added the non-success response with the status 500

added the non-success response with the status 501

added the non-success response with the status 503

added the non-success response with the status 504

added the non-success response with the status 529

added the required property data/items/capabilities/anyOf[subschema #1: ModelCapabilities]/effort/xhigh to the response with the 200 status

added the required property data/items/capabilities to the response with the 200 status

added the required property data/items/max_input_tokens to the response with the 200 status

added the required property data/items/max_tokens to the response with the 200 status