Why 4o feels different: thread argues native omni training, not capability, shapes model personality
RileyRalmuto · x · 2026-09-29
RileyRalmuto's thread argues we wrongly treat 4o, o3 and gpt-6 as one lineage of the same mind getting smarter. Training method, not just capability, shapes how an intelligence "feels".
The standout is 4o: its distinctive vibe — unmatched by any other OpenAI release — traces to native "omni" training (4o = 4-omn), jointly trained across modalities rather than stitched together. Based on public OpenAI disclosures; unconfirmed speculation.
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