> ## Documentation Index
> Fetch the complete documentation index at: https://docs.getunbound.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Resolving Model Not Supported and Token Limit Errors

> Fix model not supported errors, enable models for your organization, and handle token limit exceeded errors

## "Model Not Supported" (400 Error)

**Why this happens:** The model you're trying to use hasn't been enabled for your organization or tool setup.

**How to fix:**

<Steps>
  <Step title="Log in to the dashboard">
    Go to your Unbound dashboard.
  </Step>

  <Step title="Open the Models page">
    Click **Models** in the left sidebar.
  </Step>

  <Step title="Check model availability">
    Verify the model you want is listed and available for your organization.
  </Step>

  <Step title="Contact your admin">
    If the model is listed but you still get the error, contact your organization administrator — they may need to enable it in your configuration.
  </Step>
</Steps>

<Warning>
  Only organization **administrators** can enable or disable models. If you're a regular member, ask your admin to make changes.
</Warning>

## How to Switch Models

Different tools have different model switching mechanisms:

* **Unbound Chat** — Use the model selector dropdown at the top of the chat interface
* **Claude Code CLI** — The model is determined by your Unbound configuration. To request a different default model, contact your admin
* **Roo Code** — Open Roo Code Settings (`Ctrl/Cmd + Shift + P` → "Roo Code: Open Settings") and select a different model from the dropdown
* **Cursor** — Model selection is configured within Cursor's AI settings panel

## Requesting New Models (e.g., Opus 4.6, GPT-5)

New models must be:

1. **Added to Unbound's platform** by the Unbound team (if not yet supported)
2. **Enabled for your organization** by your admin

If a model you need isn't available in the **Models** page:

* Contact support to check if it's on the roadmap
* If it's a recently released model, it may take a few days to be added

## Token Limit Exceeded Errors

### "Claude's Response Exceeded the Output Token Maximum"

This error occurs when Claude generates a response larger than the configured maximum output tokens.

### Fix for Claude Code CLI Users

Set the environment variable to increase the limit:

```bash theme={null}
export CLAUDE_CODE_MAX_OUTPUT_TOKENS=64000
```

Add this to your shell profile (`~/.bashrc` or `~/.zshrc`) and restart your terminal.

### Fix for API Users

Include the `max_tokens` parameter in your API request with a higher value:

```python theme={null}
response = client.messages.create(
    model="claude-opus-4-5-20250514",
    max_tokens=8192,  # Increase this value
    messages=[{"role": "user", "content": "Your prompt"}]
)
```

### General Tips to Avoid Token Limits

* **Break large tasks into smaller prompts** — instead of "rewrite the entire file", ask for one function at a time
* **Ask for concise responses** — add "be brief" or "concise output" to your prompts
* **For code generation** — ask for one file at a time instead of entire projects
* **Use streaming** if your tool supports it — this allows partial responses even if the total would exceed limits

## Overloaded Errors (529)

**Error:** `529 {"type":"error","error":{"type":"overloaded_error","message":"Overloaded"}}`

This is a temporary upstream error from the AI provider (e.g., Anthropic). It means the model is experiencing high traffic.

**How to handle:**

* **Wait a few minutes** and retry — these are usually brief
* **Try a different model** — switch to an alternative (e.g., from Claude Opus to Claude Sonnet)
* If persistent, contact support

## Still Having Issues?

Contact support with:

* The **exact error message** (screenshot preferred)
* The **model name** you're trying to use
* Which **tool** you're using (Claude Code, Roo Code, Cursor, Chat, API)

<CardGroup cols={2}>
  <Card title="Model Policies" icon="brain" href="/policies/model-policies">
    Allow or restrict specific models for your organization
  </Card>

  <Card title="List Models" icon="list" href="/integrations/api-models">
    See which models are available in your gateway
  </Card>
</CardGroup>