Gpt-5.4-mini not working with Batch API — model_not_found

I can confirm this is an issue for gpt-5.4-mini-2026-03-17-batch and gpt-5.4-nano-2026-03-17-batch. As a potential workaround: gpt-5-nano and gpt-5-mini works.

I have pinged the team with your report. Thank you for raising this!