Anthropic says Fable 5 reproduced 5 of OpenAI’s 10 Astra math advances in 24 hours
EricBuess · x · 2026-08-04
Anthropic’s Fable 5 reportedly reproduced half of OpenAI’s ten Astra math advances in 24 hours
Anthropic mathematician Levent Alpöge says Fable 5 autonomously solved five of the ten Astra math results within a day, using only a generic prompt and no internet access.
The post argues that these breakthroughs may not hinge on a single secret model or carefully tuned prompt. It also notes that the results still need to be published and independently verified, but suggests research-level math may be turning into a repeatable frontier capability rather than a one-off milestone.
More from Models
- Gemini 4 Carbon Review: Stronger Coder Than Argon, but Fable 5.2 Raised the Bar — every · 2026-11-14
- Gemini 4 Krypton reportedly hits Opus 5.5-level performance — feblet · 2026-11-14
- Nathan Lambert: Jensen Huang's exit is a decapitation for Nvidia's open-model bet — natolambert · 2026-11-14
- Leak: Google 'krypton' model coming next week, Fable 5.2-level but cheaper — imjustnewatai · 2026-11-14
- OpenAI dissolves robotics team again as GPT-6 Astra can control robots directly — The Decoder · 2026-11-14
- Users report Sol 6.1 has become 'incredibly stupid' lately, making rookie mistakes — graham_dev · 2026-11-14