Why o3 likely isn't from Cursor: Technical analysis against the GLM theory
teortaxesTex · x · 2026-08-23
Addressing rumors that OpenAI's new o3 model might be a Cursor-trained variant based on GLM, the author argues against it. Key points: Cursor focuses on post-training for SWE agents, making vision training unlikely for their stack; plus, with ample PR resources and Musk-affiliated compute, a stealth launch makes little strategic sense.
Related event: Blogger Cites Three Arguments Against o3 Originating from Cursor(2 posts)→
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