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Introducing ChatGPT Images 2.5

L3 · BuilderModels & ReleasesSimon Willison's Blog· 9/8/2026

Provides API-level details and practical implementation guidance for developers building with OpenAI's image generation models.

AI Summary

OpenAI released ChatGPT Images 2.5 with improved instruction-following, faster response times, and better reference image preservation across two API models.

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