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GPT-6.1 Sol reportedly saturates FrontierMath Tier 4
A user also claims Astra solved five Erdős problems, two under budget.
TLDR
A user says GPT-6.1 Sol has saturated FrontierMath Tier 4, which they describe as exceptionally difficult even for research-level math in 2025. They call it 10 months of progress and also claim Astra solved five Erdős problems, two under budget.
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