#claude fable
4 articles
TechnologyClaude Fable 5: Anthropic admits "wrong tradeoff" after invisibly throttling rival AI researchers
Anthropic reverses course on a policy that would have secretly undermined AI researchers, but another point of contention persists.
June 13, 2026
3 min2 viewsThe Decoder
TechnologyClaude Fable 5 outpaces GPT-5.5 by 13 points on FrontierMath's toughest problems
Anthropic's Claude Fable 5 hits 88 percent accuracy on the hardest FrontierMath tier, a massive jump from Opus 4.5, which sat below 10 percent in early 2026. OpenAI's GPT-5.
June 13, 2026
3 minThe Decoder
TechnologyClaude Fable 5: The first Mythos model is powerful, expensive, and heavily filtered
Anthropic has released Claude Fable 5, the first model in its new Mythos class. It leads nearly every benchmark, including SWE-bench Verified at 95 percent, but costs twice as much as Opus 4.
June 12, 2026
3 min1 viewsThe Decoder
TechnologyClaude Fable is relentlessly proactive
Comments
June 12, 2026
2 min1 viewsHacker News (Top)