Is Astra publicly available?
Astra has not been publicly released as of the announcement. OpenAI described it as its next major model and demonstrated its capabilities through the math results, but access remains internal. The proofs themselves, however, are public — released as a 249-page manuscript plus Lean 4 certificates on GitHub under Apache 2.0.
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OpenAI's Astra Model Solved 10 Open Math Problems — With Machine-Verified ProofsOpenAI's Astra solved 10 longstanding open math problems with fully verified Lean 4 proofs and zero unproven steps. Total compute cost: roughly $2,000.
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