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Susilo harjo
Susilo harjo

Posted on • Originally published at susiloharjo.web.id

Anthropic Shipped Two New Models. They’re the Same Model.

#cybersecurity #infosec #ai #iot

TL;DR: Anthropic launched Claude Fable 5 (general availability) and Claude Mythos 5 (restricted, cyber defenders only) on June 9, 2026. Same underlying model. Different safety posture.

Key Takeaways

  1. TL;DR: Anthropic launched Claude Fable 5 (general availability) and Claude Mythos 5 (restricted, cyber defenders only) on June 9, 2026.

  2. The two-model packaging, in one paragraph Claude Fable 5 is the general-availability model.

  3. $10 per million input tokens, $50 per million output tokens, with the existing 90% input token discount for prompt caching, US-only inference available at 1.1x if you need it.

Bottom Line

Anthropic Shipped Two New Models. They’re the Same Model. is a signal worth watching in 2026. If you're building or securing infrastructure, keep an eye on this trend.

Read the full analysis on Susiloharjo.

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