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Rumor: OpenAI's internal AGI model Bel trained GPT-6 Astra

A leak claims OpenAI has an internal model called Bel with over 10 trillion parameters that reportedly solved the Navier-Stokes problem and was used to train GPT-6 Astra, while OpenAI has confirmed an internal model stronger than Astra exists.

Rajath Gowda
@buildwithrajathArchived 2026.09.25Originally posted 2026.09.24
Rajath Gowda @buildwithrajathOriginally posted 2026.09.24
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🚨 Wait… Bel might be OpenAI’s next fucking weapon. 👀 OpenAI reportedly has an internal AGI model called Bel. And the claims around this thing are fucking wild: → 10T+ parameters → Designed around AGI-level capabilities → Reportedly solved the Navier–Stokes Millennium Prize problem → Allegedly used to train GPT-6 Astra → Estimated 80+ hour reasoning horizon → Faster and Cheaper → Could reportedly arrive on devday or before 2027 And now OpenAI has confirmed something VERY important: An internal model significantly more capable than GPT-6 Astra solved the Navier–Stokes problem. OpenAI hasn't called that model Bel. But suddenly, the Bel leak doesn't sound nearly as fucking crazy. If even half of these Bel details are real, OpenAI may be sitting on something WAY beyond Astra. 👀

x.com/buildwithrajath/status/2103081897215898108Archived 2026.09.25 10:09