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Anthropic releases Claude Fable 5.2 and Claude Mythos 5.2 with mixed benchmark results

Anthropic launched Claude Fable 5.2 and Claude Mythos 5.2, citing gains in coding, reasoning, and vision. Fable 5.2 topped cyberattack and robot arm benchmarks but scored worse on an accounting benchmark than its predecessor.

Read the full story at The Hacker News (security) ↗

Timeline · 3 reports

  1. 2026-11-13 00:03 · DEV Community — Machine Learning
    Anthropic's New Claude Fable 5.2 Is Worse At Accounting Than The Model It Replaced
  2. 2026-11-12 02:00 · AlphaSignal
    Anthropic's Claude Fable 5.2 Tops Robot Arm Benchmark With 29-Point Leap
  3. 2026-11-10 08:16 · The Hacker News (security)
    Anthropic's Claude Fable 5.2 Beats GPT-6 Cyber in Multi-Stage Cyberattack Benchmark

More stories

  1. Anthropic IPO about six times oversubscribed as Nvidia pledge and CEO exit draw scrutiny — Reuters AI
  2. Google expands Gemini 4 Carbon access from cybersecurity defenders to Pro users and API — Google DeepMind Blog
  3. Anthropic expands Claude lineup with Fable 5.2, manufacturing tools, and Meetings beta — Anthropic (X)
  4. Anthropic launches self-hosted Claude Managed Agents in private beta — Anthropic (X)
  5. Agent Experience (AX) emerges as successor to Developer Experience amid AI agent boom — DEV Community — AI
  6. Anthropic releases Claude Fable 5.2 and Mythos 5.2 — DEV Community — AI
  7. Anthropic prepares IPO at valuation below once-touted $2 trillion — Reuters AI
  8. Mariko Mori uses Claude to create animation for retrospective 'All That Shines' — Anthropic (X)

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