Models

Select model behavior by task instead of habit.

Model choice changes cost, speed, and reliability. NextOS lets you choose defaults globally, per project, per command, or per agent.

Task-based selection

Task	Prefer
Architecture	High reasoning, larger context.
Bug diagnosis	High reasoning with tool access.
Small code edits	Fast balanced model.
Summaries	Fast inexpensive model.
Document generation	Strong writing model with enough context.
Subagents	Model matched to the agent’s specialty.

Defaults

Set a default model that is safe for most work. Override it in commands or agents for specialized behavior.

{
  "agent": {
    "review": {
      "model": "provider/model-name"
    }
  }
}

If the agent repeatedly asks for missing context, choose a model with larger context or narrow the prompt. If it overthinks simple edits, switch to a faster model.