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Anthropic

Fable 5

anthropic/claude-fable-5

A Mythos-class Anthropic model built for autonomous knowledge work and coding.

Pricing

Input$10.00per 1M tokens
Output$50.00per 1M tokens
Cached input$1.00per 1M tokens read from cache

Specifications

Context window1Mtokens
Max output66Ktokens
ProviderAnthropic
CapabilitiesVision · Reasoning · Function calling
Input typestext, image

Use Fable 5

Point your existing OpenAI SDK at xKiro and pass anthropic/claude-fable-5 as the model. Nothing else in your code changes.

from openai import OpenAI

client = OpenAI(
    base_url="https://api.xkiro.com/v1",
    api_key="YOUR_XKIRO_KEY",
)

response = client.chat.completions.create(
    model="anthropic/claude-fable-5",
    messages=[{"role": "user", "content": "Hello"}],
)
print(response.choices[0].message.content)

Supported parameters

max_tokens · temperature · top_p · stop · frequency_penalty · presence_penalty · seed · stream · tools · tool_choice · response_format · structured_outputs · reasoning · include_reasoning

Related models

Call Fable 5 through the same endpoints you already use.

Get an API key