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Claude Fable 5

Anthropic's most capable model — state-of-the-art coding, vision, and long-horizon tasks

0
paidDR 92$10/M input tokens, $50/M output tokens — less than half the price of Claude Mythos Preview.View full pricing →

Visit Claude Fable 5

https://www.anthropic.com/news/claude-fable-5-mythos-5

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About Claude Fable 5

Anthropic's most capable publicly available model, released June 9, 2026. Claude Fable 5 is state-of-the-art on nearly all tested benchmarks — software engineering, knowledge work, vision, scientific research, and long-horizon agentic tasks. Stripe reported Fable 5 compressed months of engineering into days, completing a codebase-wide Ruby migration in a single day that would have taken a whole team two months by hand. Priced at $10/M input and $50/M output tokens. Note: access was temporarily suspended June 12–present due to a US government export control directive.

Key Features

✓State-of-the-art on nearly all public benchmarks at launch
✓Highest score on Cognition FrontierCode among frontier models (even at medium effort)
✓Top score on Hebbia Finance Benchmark for senior-level financial reasoning
✓Vision: rebuild web apps from screenshots; extract numbers from dense scientific figures
✓Long-context: maintains focus across millions of tokens using file-based memory notes
✓Autonomous agentic tasks: played Pokémon FireRed to completion with vision only
✓Plays and wins Factorio autonomously
✓200K+ token context window
✓Safeguards redirect a small fraction of sensitive queries to Claude Opus 4.8

Claude Fable 5 Pros & Cons

✅ Pros

  • +Strongest coding: Stripe used it to do a 2-month codebase migration in a single day
  • +Best-in-class vision — works from raw screenshots with no extra tooling
  • +Superior long-horizon task performance vs all prior Claude models
  • +Priced below Claude Mythos Preview — better performance for less
  • +Drug design: matched skilled human operators on protein target selection without assistance

⚠️ Cons

  • −Access currently suspended (as of June 12, 2026) due to US government export control order
  • −Safeguards may redirect <5% of sessions to Opus 4.8 in sensitive topic areas
  • −Higher price than Opus 4.8 ($10/$50 vs $5/$25 per million tokens)
  • −Mythos 5 variant (unsafeguarded) limited to Project Glasswing cyberdefense program

Who Is Claude Fable 5 Best For?

👤Large-scale codebase migrations and complex multi-file software engineering
👤Document-heavy knowledge work: finance, legal, research analysis
👤Agentic workflows requiring sustained focus over long tasks
👤Vision-based tasks: UI analysis, scientific figure extraction, app reconstruction from screenshots
👤Researchers and enterprises needing the absolute frontier of publicly available AI capability

Tags

anthropicclaudellmapicodingai agentsagenticfrontier modelclaude fablevisionlong context

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