3 ms·

https://platform.openai.com/docs/models/gpt-5.2 https://platform.openai.com/docs/models/gpt-5.2 400k, not 256k.

• nathants 10mo ago
  400 - 128 = 272. Codex cli source.
  • coder543 10mo ago
    If you want to be able to generate up to 128k tokens in one go successfully, then yes, that math checks out.