GPT-5-mini does not support Max tokens but rather max_completion_tokens [#3545619]

I was trying to test out the simple crawler with automation and CKEditor similar to what happens here:
https://www.youtube.com/watch?v=NVlrFPdF1jk&t=3531s

it worked fine with GPT-4.1-mini but when switching to GPT-5-mini I get:

This model does not support Max Tokens, but max_completion_tokens

Also, with GPT-5-mini you can't change the temperature and it says:

It only supports the defaul 1

I suggest custom loading of fields and values based on models, probably not an easy feat to just add this but moving forward each model might come with specific parameters

Comment	File	Size	Author
#3	openai_provider_changes.patch	1.05 KB	akalsey

Comments

Comment #1

9 September 2025 at 09:03

doxigo created an issue. See original summary.

Comment #2

keiserjb commented 29 September 2025 at 17:05

Make sure your https://www.drupal.org/project/ai_provider_openai module is using 1.2 and is updated.

It has added this code.

// Do this change for o1, o3 and gpt-5 models.
    if (str_starts_with($model_id, 'gpt-5') || str_starts_with($model_id, 'o1') || str_starts_with($model_id, 'o3')) {
      if (array_key_exists('max_tokens', $generalConfig)) {
        $generalConfig['max_completion_tokens'] = $generalConfig['max_tokens'];
        unset($generalConfig['max_tokens']);
      }
    }