Anthropic: Claude Fable 5.1
Chatanthropic/claude-fable-5.1Anthropic Claude Fable 5.1 - Mythos-class frontier model (successor to Fable 5): ambitious coding, long-horizon agents, enterprise knowledge work; adaptive thinking always on
Context Window
1M
Max Output Tokens
128K
Released
2026-09-01
Capabilities
VisionFunction CallingReasoningPrompt CachingPDF Input
Available Providers
Bedrock
Supported Protocols
openaianthropic
Providers
Bedrock
Input Tokens
$10/M
Output Tokens
$50/M
Cache Read
$0.25/M
Cache Write (5 min)
$12.5/M
Cache Write (1 hour)
$20/M
Web Search
$0.015/R
Protocols
openai
/v1/chat/completions/v1/responsesanthropic
Code Examples
import anthropicclient = anthropic.Anthropic(base_url="https://api.ofox.ai/anthropic",api_key="YOUR_OFOX_API_KEY",)message = client.messages.create(model="anthropic/claude-fable-5.1",max_tokens=1024,messages=[{"role": "user", "content": "Hello!"}],)print(message.content[0].text)
Related Models
Frequently Asked Questions
Anthropic: Claude Fable 5.1 on Ofox.ai costs $10/M per million input tokens and $50/M per million output tokens. Pay-as-you-go, no monthly fees.
Anthropic: Claude Fable 5.1 supports a context window of 1M tokens with max output of 128K tokens, allowing you to process large documents and maintain long conversations.
Simply set your base URL to https://api.ofox.ai/v1 and use your Ofox API key. The API is OpenAI-compatible — just change the base URL and API key in your existing code.
Anthropic: Claude Fable 5.1 supports the following capabilities: Vision, Function Calling, Reasoning, Prompt Caching, PDF Input. Access all features through the Ofox.ai unified API.