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Rumor: OpenAI may ship GPT-6.5 Astra before DevDay to answer Opus 5.5

A leak says Opus 5.5 is performing better than expected and is cheaper than Astra, so OpenAI is preparing a new Astra-class release, possibly called GPT-6.1 or GPT-6.5, around DevDay or early October.

Salio
@Mr_SalioArchived 2026.09.25Originally posted 2026.09.24
Rumor: OpenAI may ship GPT-6.5 Astra before DevDay to answer Opus 5.5
Salio @Mr_SalioOriginally posted 2026.09.24
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🚨 GPT-6.5 Astra Leak > Openai could be preparing a response to opus 5.5 > Opus 5.5 just landed and is reportedly putting serious pressure on Astra > It's also significantly cheaper than Astra > OpenAI may not have expected Opus 5.5 to perform this well > a new Astra-class update already being prepared > Could be called GPT-6.1 Astra or even GPT-6.5 > OpenAI could be looking to respond around DevDay or early October > The goal: push past Opus 5.5 and get ahead of Anthropic's next models > OpenAI has been teasing a huge DevDay for weeks Let's see how OpenAI responds

x.com/mr_salio/status/2103070188757303485Archived 2026.09.25 10:09