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Claude Fable 5 Scores 95% on SWE-bench, Then Hands Off to Opus 4.8

Anthropic's new Mythos-class model leads on coding benchmarks but deliberately defers to a safer predecessor in restricted domains. That design choice says more than the score.

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Claude Fable 5 Scores 95% on SWE-bench, Then Hands Off to Opus 4.8

Anthropic's new Mythos-class model leads on coding benchmarks but deliberately defers to a safer predecessor in restricted domains. That design choice says more than the score.

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Timeline cronologica

martedì 9 giugno 2026·thenextweb.com
Anthropic releases Claude Fable 5, its first Mythos-class model for the public
Anthropic launched Claude Fable 5 on Tuesday, a Mythos-class model with safeguards blocking cybersecurity and biology queries, priced at $10 per million input tokens.
martedì 9 giugno 2026·zdnet.com
Anthropic's new Claude Fable 5 is a nerfed Mythos with guardrails attached
Claude Fable 5 brings Mythos-class AI coding power to general users, but with cybersecurity guardrails, fallback models, and pricing that could make developers think twice.

Claude Fable 5 Scores 95% on SWE-bench, Then Hands Off to Opus 4.8

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Claude Fable 5 Scores 95% on SWE-bench, Then Hands Off to Opus 4.8

Timeline cronologica

Anthropic releases Claude Fable 5, its first Mythos-class model for the public

Anthropic's new Claude Fable 5 is a nerfed Mythos with guardrails attached

Claude Fable 5: The first Mythos model is powerful, expensive, and heavily filtered

Claude Fable 5 brings Mythos to the masses — Anthropic's new frontier model is 'state-of-the-art on nearly…

Claude Fable 5 Vs Opus 4.8 And GPT-5.5: What The Benchmarks Show

Anthropic's new Claude Fable 5 is a nerfed Mythos with guardrails attached

Anthropic releases Claude Fable 5, its first Mythos-class model for the public

Anthropic releases Claude Fable 5 and Mythos 5 with major gains in coding and science

Claude Fable 5 review: what the new Mythos model gets right (and very wrong)

Anthropic launches Claude Fable 5, a state-of-the-art AI model that beats OpenAI's GPT-5.5

Anthropic Launches Claude Fable 5 at Half the Price of Mythos Preview — Benchmarks Top All Rivals

Claude Fable 5 brings Mythos to the masses — Anthropic's new frontier model is 'state-of-the-art on nearly all tested benchmarks'

Anthropic sets AI performance records with new Mythos 5, Fable 5 frontier models - SiliconANGLE

[AINews] Anthropic Claude Fable 5 — Mythos but Safe, with Controversial Terms

Anthropic launches Claude Fable 5, a Mythos-class model made safe for general use

Claude Fable 5: The first Mythos model is powerful, expensive, and heavily filtered

Claude Fable 5 & Mythos 5: Key highlights from Anthropic’s latest launch - The Economic Times

Claude Fable 5 Vs Opus 4.8 And GPT-5.5: What The Benchmarks Show

Claude Fable 5 ranks first in Code Arena, leading by 98 points

Claude Fable 5 Scores 95% on SWE-bench, Then Hands Off to Opus 4.8

Anthropic's Claude Fable 5 costs twice as much for 5.7 percent more performance

Anthropic's Claude Fable 5 speaks its own language, and that's a problem

Fable 5 dropped and I'm suddenly a lot more paranoid about my VS Code extensions

Claude Fable 5 outpaces GPT-5.5 by 13 points on FrontierMath's toughest problems

Claude Fable 5 vs Opus 4.8: The Mythos Hype Meets Reality