AI Large Language Models

Claude Fable 5

Anthropic's Claude Fable 5 is a state-of-the-art AI language model with exceptional performance in coding, analytics, vision, and research, featuring advanced safety classifiers.

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Claude Fable 5

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What is Claude Fable 5?

Claude Fable 5 is a large language model from Anthropic, offering top-tier capabilities across software engineering, knowledge work, vision, and life sciences. It includes safety classifiers that fall back to a less capable model on sensitive topics. Claude Mythos 5 is a version with relaxed safeguards for trusted partners.

How to use Claude Fable 5?

  1. 1Access Claude Fable 5 via the Claude API using the model ID 'claude-fable-5'.
  2. 2Pricing is $10 per million input tokens and $50 per million output tokens.
  3. 3For subscription plans (Pro, Max, Team, Enterprise), Fable 5 is included at no extra cost until June 22.
  4. 4After June 22, usage credits may be required.
  5. 5Mythos 5 is available only through Project Glasswing or trusted access programs.

Claude Fable 5 Key Features

  • State-of-the-art performance on multiple benchmarks
  • Exceptional software engineering and coding abilities
  • Advanced knowledge work and analytical reasoning
  • Vision understanding and screenshot-to-code capability
  • Long-context memory and autonomous operation
  • Safety classifiers for cybersecurity, biology, and distillation fallback
  • Lower token pricing than previous Mythos models

Claude Fable 5 Use Cases

  • Codebase-wide migrations and software development
  • Complex analytical tasks and financial modeling
  • Vision-based tasks like rebuilding apps from screenshots
  • Scientific hypothesis generation and research
  • Drug design and protein engineering
  • Autonomous agentic tasks in various domains

Claude Fable 5 Pricing & Free Credits

Claude Fable 5 currently operates on a Paid model.

API Token Pricing

$10/1M input, $50/1M output

Per-token pricing for API access via Claude API.

Subscription Plans (until Jun 22)

Included

Fable 5 included at no extra cost on Pro, Max, Team, and Enterprise plans.

Subscription After Jun 22

Usage credits required

After June 22, Fable 5 usage may require additional credits.

Claude Fable 5 Pros & Cons

Pros

  • State-of-the-art across many benchmarks
  • Excellent software engineering and coding capabilities
  • Strong vision and long-context memory
  • Effective safety classifiers to prevent misuse
  • Lower pricing than previous Mythos Preview

Cons

  • Safeguards may trigger false positives on harmless requests
  • Free inclusion in subscription plans only until June 22
  • High demand may impact availability

What is Claude Fable 5 best for?

  • Software engineers and developers
  • Data scientists and analysts
  • Researchers in life sciences and genomics
  • Cybersecurity professionals (Mythos 5)
  • Knowledge workers requiring complex reasoning

Claude Fable 5 FAQ

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