Claude Fable 5

Authentication

authorization string required

All APIs require authentication via Bearer Token.

Get API Key:

Visit API Key Management Page to get your API Key.

Usage:

Add to request header:

Authorization: Bearer YOUR_API_KEY

Parameters

model string required

Model ID to use for the request

Value: claude-fable-5

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messages array required

Array of message objects representing the conversation history

role string required

Message role

Options: user, assistant, system, developer

content string | array required

Text string or multimodal array

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max_tokens integer

Maximum tokens to generate in the completion

Range: 1 - 64000

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temperature number

Sampling temperature to use

Default: 1.0

Range: 0.0 - 2.0

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top_p number

Nucleus sampling parameter

Default: 1.0

Range: 0.0 - 1.0

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stream boolean

Whether to stream response incrementally

Default: false