OpenAI fixes an image encoding bug that degraded GPT-6 Sol and Luna image understanding

OpenAI's API changelog says a bug in image encoding degraded image understanding in GPT-6 Sol and GPT-6 Luna, and the fix improves visual tasks in the API and Codex, including computer use.

Who is affected:

Apps and Codex sessions that sent image inputs or used computer use with GPT-6 Sol or GPT-6 Luna after their September 22 release.

What to do:

Rerun evaluations and retry workflows that used image inputs with GPT-6 Sol or GPT-6 Luna.