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

# Model Types & Access

> Understanding which models you can access and how they are billed

Understanding which models you can access and how they're billed.

## Model Categories

Electron Hub has three main model categories:

<Accordion title="Free Models (:free suffix)" icon="gift">
  <Card title="Free Models" icon="gift" color="#10B981">
    * Models that end with `:free` (e.g., `gpt-3.5-turbo:free`)
    * Use **Neutrinos** instead of credits
    * No subscription required
    * Best for: Testing, light usage, learning
  </Card>

  <Warning>
    <strong>Uptime:</strong> We don't guarantee 100% uptime at peak times (we host these ourselves and need to ensure fair usage)
  </Warning>
</Accordion>

<Accordion title="Freemium Models" icon="star">
  <Card title="Freemium Models" icon="star" color="#8B5CF6">
    * Models that don't require a subscription
    * **Do deduct credits** from your balance
    * Available to all users (Free tier and above)
    * Better uptime than free models
    * Best for: Regular usage without subscription commitment
  </Card>
</Accordion>

<Accordion title="Premium/Ultimate Models" icon="crown">
  <Card title="Premium Models" icon="crown" color="#F59E0B">
    * Models that **require a subscription** (Starter plan or higher) **OR permanent credits**
    * Free tier users with permanent credits can access premium models
    * Also deduct credits from your balance
    * Better uptime than free/freemium models
  </Card>

  <Card title="Ultimate Models" icon="infinity" color="#EF4444">
    * Models that **require a Pro tier or higher** subscription
    * Also deduct credits from your balance
    * Best for: Production applications, critical workloads
  </Card>
</Accordion>

## Premium Model Examples

<Card title="Popular Premium Models" icon="star" color="#8B5CF6">
  * `gpt-4`
  * `o1`, `o1-low`, `o1-high`
  * `o3-pro`, `o3-pro-low`, `o3-pro-high`
  * `o3-deep-research`
  * `claude-sonnet-4-5-20250929`
  * `gemini-3-pro-preview`
</Card>

## Model Access by Tier

<Columns cols={2}>
  <Card title="Free Tier" icon="gift" color="#10B981">
    * Free models (with Neutrinos)
    * Freemium models (with credits)
  </Card>

  <Card title="Free + Permanent Credits" icon="wallet" color="#8B5CF6">
    * Free models
    * Freemium models
    * **Premium models** (credits required)
  </Card>

  <Card title="Starter/Plus/Core" icon="star" color="#F59E0B">
    * All freemium models
    * Premium models
  </Card>

  <Card title="Pro/Business/Enterprise" icon="infinity" color="#EF4444">
    * All models including
    * Premium models
    * Ultimate models
  </Card>
</Columns>

<Info>
  <strong>Note:</strong> Free tier users who have purchased permanent credits can access premium models (but not ultimate models). Ultimate models still require a Pro tier or higher subscription. Check the model list in the dashboard or API documentation to see which models require which tier.
</Info>

## Why don't free models guarantee 100% uptime?

<Info>
  Free models are hosted by Electron Hub directly, and during peak usage times, we need to ensure fair distribution of resources among all users.
</Info>

<Tip>
  For guaranteed uptime and better performance, we recommend:

  * Using freemium models (deduct credits but better uptime)
  * Subscribing to a premium tier to access premium models (routed to multiple providers)
</Tip>

## Model Status

<Card title="Check Status" icon="globe" href="https://status.electronhub.ai" color="#10B981">
  Check the [Status Page](https://status.electronhub.ai) for real-time uptime status of popular models.
</Card>