Anthropic: Claude Fable 5Chat

anthropic/claude-fable-5

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Anthropic's most powerful generally available model — the first public Mythos-class model, a new tier above Opus.

1M context window

128K max output tokens

Released: 2026-06-09

Protocols:OpenAIAnthropic

Capabilities:VisionFunction CallingReasoningPrompt CachingPDF InputWeb Search

PriceRate 0.15x

HaoAI

Official

Input

$1.5/M

$10/M

Output

$7.5/M

$50/M

Cache read

$0.15/M

$1/M

Cache write

$1.88/M

$12.5/M

Cache write 5m

$1.88/M

$12.5/M

Cache write 1h

$3/M

$20/M

Code Examples

import anthropic

client = anthropic.Anthropic(
    base_url="https://api.hao.ai/anthropic",
    api_key="YOUR_HAOAI_API_KEY",
)

message = client.messages.create(
    model="anthropic/claude-fable-5",
    max_tokens=1024,
    messages=[
        {"role": "user", "content": "Hello!"}
    ],
)

print(message.content[0].text)