OpenAI's mystery image models spotted in the wild
Mysterious new image models codenamed Chestnut and Hazelnut just appeared on LM Arena and Design Arena, with users speculating they belong to OpenAI. Testers report sharp world knowledge, realistic selfies, and clean in-image code rendering. Why it matters: If the rumor mill is right, OpenAI may be gearing up to launch its next-generation image system alongside GPT 5.2.