The default LLM model is now GPT5

As of February 12, 2026, the default LLM model used by Superhuman Go agents has been updated from OpenAI's GPT-4 to GPT-5. This update brings improved reasoning and performance across agents.

If you have an agent deployed on the platform, we recommend running a quick validation to ensure everything continues to work as expected. If you would like to revert back to GPT-4, you can do so by setting the models field on your skills:

pack.addSkill({
  // ...
  models: [
    { model: coda.SkillModel.OpenAIGPT4 },
  ],
});

You can read more about model selection in the Skills guide. We aim to provide advance notice for model updates whenever possible and we'll continue sharing updates as the Go platform evolves.