Michał Skiba
Hi SimpleLocalize team,
I'm using the Auto-translate feature with OpenAI (ChatGPT) provider and have two issues:
  1. GPT-4o is deprecated, but GPT-4.1 returns 403
I'm currently using gpt-4o for auto-translations, which is now marked as deprecated by OpenAI. When I switch to gpt-4.1 (available in your model dropdown), I get a 403 Forbidden error. My OpenAI API key has no restrictions — it works fine with gpt-4.1 directly via the OpenAI API.
Could you check if there's an issue with how SimpleLocalize calls the OpenAI API for the gpt-4.1 model? Perhaps an outdated API endpoint or missing header?
  1. Model list is outdated — missing GPT-5.4 family
The newest model available in the dropdown is gpt-4.1, but OpenAI has released the GPT-5.4 family which is now their latest offering:
gpt-5.4 — best intelligence for agentic and professional workflows
gpt-5.4-mini — strong mini model, great cost/quality ratio
gpt-5.4-nano — cheapest option for high-volume tasks
Could you update the model list to include these?
Environment:
Provider: OpenAI (ChatGPT)
Current model: gpt-4o (deprecated)
Desired model: gpt-5.4-mini or gpt-5.4
API key: no restrictions, works outside SimpleLocalize
Thank you!