Sebastien BubeckOpenAI

OpenAI's next major model Astra solves 10 major math problems; publishes 'genuine research-level discoveries' with Lean certificates and CoT walkthroughs

OpenAI's new model, Astra, has achieved significant breakthroughs in mathematics, solving ten major problems and producing genuine research-level discoveries. The results, which include Lean certificates and CoT walkthroughs, showcase Astra's potential as a collaborative tool for mathematicians, with a total compute cost of approximately $2,000.

NextBigFuture.com1 August 2026 · 23:18 UTC
CuriousCats Full Story

OpenAI's Astra model has made waves in the mathematical community by solving ten significant problems, including the long-standing question of whether every countable discrete group is sofic, which remained open for nearly 27 years.

Sebastien Bubeck of OpenAI highlighted that Astra has produced "many new beautiful results," including proofs that are accompanied by Lean certificates and CoT walkthroughs.

The results span various fields, from rigidity theory for von Neumann algebras to sharper quantitative bounds on Erdős-type questions.

The total compute cost for generating these arguments was approximately $2,000 at OpenAI's Sol API rates, demonstrating the model's efficiency.3

The collaboration between humans and Astra has led to the transformation of core ideas into manuscripts, showcasing the model's ability to assist in genuine research-level discoveries.

This advancement not only accelerates mathematical progress but also provides new tools and examples for human mathematicians, illustrating AI's potential as a collaborator in generating novel proofs across diverse fields.

Key Insight
“The proofs were generated by an internal version of Astra at a total compute cost of about $2,000 using Sol API rates, and humans then turned the core ideas into manuscripts. The advances also include a Connes rigidity counterexample and sharper bounds in packing/coding, circuit, lattice, Ramsey and extremal-graph problems.”
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NextBigFuture.com
“Sebastien Bubeck of OpenAI says “yes, nonsofic groups exist”—as an example of “many new beautiful results” from Astra, next major OpenAI model.”
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