# Choose AI Models


The **AI Behavior** page lets you see every model available on the platform and set the company-wide default that new employees start with, along with other workspace-wide behavior settings.

## TL;DR

Go to Settings > Technical > AI Behavior to browse all available models organized by tier (Fast, Standard, Advanced). Set the company-wide default model here. The tier determines how many credits each message costs: Fast is cheapest, Advanced is most powerful. Individual employees can be switched to a different model on their profile.

## Where to Find It

1. Click the **gear icon** in the top-right of your workspace
2. Go to **Technical > AI Behavior**

## Model Tiers

Every model belongs to one of three tiers. The tier determines cost and capability.

| Tier | Speed | Capability | Credit Cost | Best For |
|------|-------|------------|-------------|----------|
| **Fast** | Quickest responses | Good for simple, well-defined work | Lowest (roughly 10x cheaper than Advanced) | Quick lookups, formatting, simple drafts, routine Q&A |
| **Standard** | Balanced | Handles most everyday tasks well | Medium | Conversations, analysis, writing, planning |
| **Advanced** | Slower, more thorough | Best reasoning and nuance | Highest | Complex analysis, long documents, multi-step reasoning |

## Available Models

### Fast Tier

| Model | Provider | Credits per 1M tokens | Reasoning |
|-------|----------|-----------------------|-----------|
| GPT-5 Nano | OpenAI | 33 | Adjustable |
| GPT-4.1 Nano | OpenAI | 40 | Basic |
| GPT-4o Mini | OpenAI | 61 | Basic |
| GPT-4.1 Mini | OpenAI | 162 | Basic |
| GPT-5.4 Nano | OpenAI | 110 | Adjustable |
| GPT-5 Mini | OpenAI | 165 | Adjustable |

### Standard Tier

| Model | Provider | Credits per 1M tokens | Reasoning |
|-------|----------|-----------------------|-----------|
| GPT-5.4 Mini | OpenAI | 399 | Adjustable |
| o4 Mini | OpenAI | 445 | Adjustable |
| Haiku 4.5 | Anthropic | 468 | Adjustable |
| GPT-4o | OpenAI | 1,011 | Basic |

### Advanced Tier

| Model | Provider | Credits per 1M tokens | Reasoning | Notes |
|-------|----------|-----------------------|-----------|-------|
| Kimi K2.5 | DeepInfra | 230 | Built-in | Recommended. Best value in Advanced tier |
| Kimi K2.6 | DeepInfra | 421 | Built-in | Newer K2 generation |
| GPT-5.1 | OpenAI | 824 | Adjustable | |
| GPT-5.2 | OpenAI | 1,154 | Adjustable | |
| Sonnet 4.6 | Anthropic | 1,404 | Adjustable | |
| GPT-5.4 | OpenAI | 2,181 | Adjustable | |
| Opus 4.7 | Anthropic | 2,340 | Adjustable | Most capable Anthropic model |
| Opus 4.6 | Anthropic | 2,340 | Adjustable | Prior Opus generation |
| GPT-5.2 Pro | OpenAI | 13,851 | Adjustable | Premium |
| GPT-5.4 Pro | OpenAI | 26,170 | Adjustable | Premium |

## What You See on the Page

The AI Behavior page displays all available models grouped by tier in the Employee Brain card. For each model you can see:

- **Model name** and provider
- **Tier** (Fast, Standard, or Advanced)
- **Reasoning support** label, if the model supports extended thinking
- **Default badge**, if it is the current company-wide default

## Setting the Company-Wide Default

The company-wide default model is what every newly hired employee uses unless you change it individually.

1. Go to **Settings > Technical > AI Behavior**
2. In the **Employee Brain** card, pick the model you want as the default
3. The change saves automatically

**Important:** Changing the default only affects employees hired after the change. Existing employees keep their current model. To change an existing employee's model, go to their profile.

## Reasoning Models

Some models support **reasoning**, which means the employee can think through complex problems step by step before responding. Reasoning models:

- Show a "thinking" phase in the chat before the final answer
- Produce more thorough, accurate responses for complex tasks
- Use more credits per message because of the additional thinking

Models with reasoning support can be tuned via the **Thinking Depth** selector in the Employee Brain card on the AI Behavior page. You can see the reasoning process in the Activity Inspector when inspecting a message.

## How Models Affect Credits

The model tier is the biggest factor in credit cost per message.

| What Changes | Impact |
|-------------|--------|
| **Fast tier model** | Fewest credits per message. Great for high-volume, simple work |
| **Standard tier model** | Moderate credits. The default balance of cost and capability |
| **Advanced tier model** | Most credits per message. Reserve for work that truly needs it |
| **Reasoning enabled** | Additional credits for the thinking phase |

You can mix and match across your workforce: assign Fast models to employees doing routine work and Advanced models to employees handling complex analysis.

## Per-Employee Model Override

The company default is just the starting point. You can change any individual employee's model.

1. Go to your **Workspace** and select the employee
2. Open the **Settings** tab (or persona settings)
3. Change the AI model

This override only affects that one employee. All other employees continue using their assigned models.

## Tips and Tricks

- **Start with Standard as the default.** It handles most tasks well at a reasonable cost. Switch individual employees to Fast or Advanced based on their specific work
- **Use Fast for high-volume employees.** If an employee answers lots of simple questions or does routine formatting, Fast saves significant credits
- **Reserve Advanced for where it matters.** Complex reasoning, long document analysis, and nuanced decision-making benefit most from Advanced models
- **Check reasoning support.** If an employee needs to work through multi-step problems, assign a model with reasoning support

## Frequently Asked Questions

**Q: Where do I set the company-wide default model?**
A: Go to Settings (gear icon) > Technical > AI Behavior. In the Employee Brain card, pick the model you want. It saves automatically.

**Q: Does changing the default model affect existing employees?**
A: No. Only newly hired employees use the new default. Change existing employees individually on their profile.

**Q: What is the difference between tiers?**
A: Fast is cheapest and quickest for simple tasks. Standard balances cost and capability for everyday work. Advanced is most powerful for complex reasoning but costs the most credits.

**Q: Can different employees use different models?**
A: Yes. The company default is just the starting point. You can assign any available model to any individual employee on their profile.

**Q: Do reasoning models cost more?**
A: Yes. The thinking phase uses additional credits. The total cost depends on how much reasoning the model does for each response.