---
title: Models
description: The models an agent can think with, when to pick each, their prices, and thinking levels.
source: [packages/agents/src/org.ts]
generated: true
---

> Roadstar docs for agents. Every page, as markdown: https://docs.roadstar.app/llms.txt

Each agent thinks with one model, chosen when it is made (`make_agent`'s `model`) and changed with `change_agent`. Leave it out for the default. A chat always thinks lightly; thinking applies to threads.

## Models

| Model | Id | When to pick it | Input | Cached input | Output |
| --- | --- | --- | --- | --- | --- |
| GPT-6 Luna | `gpt-6-luna` | a tenth of Terra's price, for simple, repetitive work | $0.1 | $0.01 | $0.5 |
| GPT-6.1 Terra (default) | `gpt-6.1-terra` | the default | $1 | $0.05 | $5 |
| GPT-6.1 Sol | `gpt-6.1-sol` | twice Terra's price, for harder judgement | $2 | $0.1 | $10 |
| GPT-6 Astra | `gpt-6-astra` | ten times Terra's price, for the hardest work | $10 | $1 | $50 |

Prices are US dollars per million tokens.

## Thinking

| Level | Default |
| --- | --- |
| `low` |  |
| `medium` | yes, in threads |
| `high` |  |