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Chats

Start a new chat and stream the reply

post/v1/chats

Request body

messagestring required
model'auto' | 'anthropic/claude-opus-5' | 'anthropic/claude-opus-4.8' | 'anthropic/claude-sonnet-5' | 'anthropic/claude-sonnet-4.6' | 'anthropic/claude-haiku-4.5' | 'openai/gpt-5.4' | 'openai/gpt-5.5'
enableThinkingboolean
thinkingLevel'off' | 'low' | 'medium' | 'high'
timezonestring

Response

Streaming UI message stream (newline-delimited JSON chunks). Read the X-Chat-Id response header for the chat id, or take it from the start chunk's messageMetadata.chatId.

Changes

Changed in 3 of the 6 revisions of this API.3

  • 0df1eb9cc5601See the full diff
    • ○

      added subschema #3 to the context/items/ request property oneOf list

      request-property-one-of-added

  • fe8b482b103d1See the full diff
    • ○

      added the new anthropic/claude-opus-5 enum value to the request property model

      request-property-enum-value-added

  • a43b57573f721See the full diff
    • ○

      added the non-success response with the status 429

      response-non-success-status-added