How to set "reasoning_effort" of GPT-OSS during GRPO rollouts?

1. Did you update? Yes
2. Colab or Kaggle or local / cloud. Kaggle
3. Number GPUs used, use nvidia-smi. 1
4. Which trainer? GRPOTrainer

Question: We can see how to set reasoning_effort when manually inference in official colab example:

inputs = tokenizer.apply_chat_template(
    messages,
    add_generation_prompt = True,
    return_tensors = "pt",
    return_dict = True,
    reasoning_effort = "low", # **NEW!** Set reasoning effort to low, medium or high
).to("cuda")

_ = model.generate(**inputs, max_new_tokens = 64, streamer = TextStreamer(tokenizer))

But how to set reasoning_effort of GRPO Trainer (rollouts)? I could not find this option in official colab examples. I have tested that maybeGRPOTrainer is using "high" by default . But for me "medium" is enough and more time-efficient.

Thanks in advance!