OpenAI: Plus & Pro reasoning model upgraded to GPT-6 Astra
Plus/Pro flagship reasoning model upgraded from GPT-5.6 Sol Pro to GPT-6 Astra; Plus bullet now reads "Advanced reasoning models with GPT-6 Astra and GPT-5.6", Pro now reads "Pro reasoning powered by GPT-6 Astra".
What changed
OpenAI upgraded the flagship reasoning model backing Plus and Pro from GPT-5.6 Sol/Sol Pro to GPT-6 Astra: Plus now lists 'Advanced reasoning models with GPT-6 Astra and GPT-5.6' and Pro's headline reasoning benefit is now 'Pro reasoning powered by GPT-6 Astra'.
Before and after
Aug 31, 2026 vs Sep 7, 2026OpenAI upgraded the flagship reasoning model backing Plus and Pro from GPT-5.6 Sol/Sol Pro to GPT-6 Astra: Plus now lists 'Advanced reasoning models with GPT-6 Astra and GPT-5.6' and Pro's headline reasoning benefit is now 'Pro reasoning powered by GPT-6 Astra'.
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