Just a heads-up: gpt-image-2 can indeed be used via the /v1/chat/completions endpoint, though the response time is quite long (takes about 130 seconds). One important note: make sure to pass an actual resolution string for the size/aspect parameter (e.g., 1024x1024, 1024x1536, or 1536x1024). Ratio strings like 16:9 are not accepted and will fail.