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Last Week in AI · Thursday, September 24, 2026

OpenAI Releases GPT-6 Astra, Marking Significant Performance Leap

OpenAI has announced the release of its latest AI model, GPT-6 Astra. Early indications from benchmarks and user reports suggest a substantial improvement in capabilities compared to previous versions like GPT-5.6 Sol. OpenAI is positioning GPT-6 Astra as a driver for their Codex product and a competitive advantage.

companyOpenAIcompanyAnthropic

The tape

3 quotes
“So, by all indications, from what I've seen on the benchmarks, what I've seen from people self-reporting, this is a pretty big jump.”
“OpenAI also highlighted the compute use, as we mentioned, so they are positioning this very much as a Codex driver and as a competitive advantage against Anthropic, which does seem to be very real.”
“I've seen personally a lot of people starting to switch to Codex due to GPT just being in some ways significantly better than Claude, which has not been the case earlier this year, last year, right?”
Heard on Last Week in AI — “#257 - GPT 6 Astra, AI Extinction, Security Incidents”, published Thursday, September 24, 2026. Heardvine summarizes and quotes with attribution and timestamps, and links to the original everywhere.
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OpenAI Releases GPT-6 Astra, Marking Significant Performance Leap — Heardvine