We found that ChatGPT has reduced the max payload size recently the latest spec is:
o3, o3-pro, o4-mini, o4-mini-high: 48k
gpt-4-1, gpt-4-5, gpt-4o, research: 24k

You can start to use GPT-5 pro now.

We made some fix for the API:
1. The reference links may break the format.
2. The think section maybe not closed
3. The python code section maybe not closed
4. The image result of python code can not be displayed.

The proxy network run into issue again, please wait for a while. We would send another announcement when the service is restored.

Our service is restored.

We have added the GPT-4o back and fix some issues today:
1. Fix the attachment in python tool (except for GPT-5 pro)
2. Content cutoff in some cases

We have fixed the GPT-5-Pro generating attachment issue.