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

# Models

> ZeroTwo aggregates 95+ AI models from 19 providers — switch freely between them in any chat or Studio session.

ZeroTwo gives you access to 95+ AI models from 19 providers in a single interface. Switch between models mid-conversation, filter by provider, pin favorites, and access the full spectrum of AI capabilities without managing separate accounts or API keys.

## Model categories

ZeroTwo organizes models into four categories:

| Category             | Where to use          | Examples                                      |
| -------------------- | --------------------- | --------------------------------------------- |
| **Text / chat**      | Any chat conversation | Claude Sonnet, GPT-4o, Gemini 2.5 Pro, Grok-4 |
| **Image generation** | Studio → Images       | GPT-Image-1, Flux Pro, Imagen 4.0             |
| **Video generation** | Studio → Video        | AI video models (various)                     |
| **Audio generation** | Studio → Audio        | AI music and voice models (various)           |

Text models are selected via the **model picker** in the chat prompt bar. Studio pages have their own dedicated model selectors.

## Providers

ZeroTwo aggregates models from 19 text/chat providers:

<CardGroup cols={2}>
  <Card title="OpenAI" icon="brain" href="/models/providers/openai">
    GPT-5, GPT-4o, GPT-4.1, o3, o4-mini, and more
  </Card>

  <Card title="Anthropic" icon="sparkles" href="/models/providers/anthropic">
    Claude Opus 4.6, Claude Sonnet 4.6, Claude Haiku 4.5, and more
  </Card>

  <Card title="Google" icon="layers" href="/models/providers/google">
    Gemini 3.1 Pro, Gemini 2.5 Pro, Gemini 2.5 Flash, and more
  </Card>

  <Card title="xAI" icon="zap" href="/providers/xai">
    Grok-4, Grok 4 fast, and variants
  </Card>

  <Card title="Mistral" icon="cpu" href="/providers/mistral">
    Mistral Large, Magistral, Mistral Small, Mistral Nemo
  </Card>

  <Card title="DeepSeek" icon="brain" href="/providers/deepseek">
    DeepSeek V3, DeepSeek Reasoner
  </Card>

  <Card title="Cohere" icon="layers" href="/providers/cohere">
    Command A and variants
  </Card>

  <Card title="Perplexity" icon="sparkles" href="/providers/perplexity">
    Sonar Pro, Sonar, and variants
  </Card>

  <Card title="Qwen" icon="cpu" href="/providers/qwen">
    Qwen Max, Qwen Plus, and variants
  </Card>

  <Card title="Groq" icon="zap" href="/providers/groq">
    Fast inference models via Groq infrastructure
  </Card>

  <Card title="OpenRouter" icon="layers" href="/providers/openrouter">
    Additional model access via OpenRouter
  </Card>

  <Card title="More providers" icon="sparkles" href="/providers/thesys">
    Kimi, Venice, TheSys, ZAI, Inception, ByteDance, Liquid
  </Card>
</CardGroup>

## Plan and model access

Model access in ZeroTwo is divided into two tiers:

* **Standard models**: No monthly cap. Available on all plans including Free. Includes GPT-5-mini, GPT-4o-mini, Gemini Flash Lite, Mistral Small, Grok 4 fast, and other efficient variants.
* **Premium (rate-limited) models**: Counted against your monthly quota. Includes flagship models like Claude Sonnet 4.6, GPT-5, Gemini 2.5 Pro, Grok-4, and others.

| Plan       | Premium message quota    |
| ---------- | ------------------------ |
| Free       | 0 — standard models only |
| Pro        | 555 messages/month       |
| Pro 2x     | 1,150 messages/month     |
| Plus Ultra | Unlimited                |
| Business   | Unlimited                |

When your premium quota is reached, ZeroTwo automatically falls back to a standard model. See [Premium vs. Standard models](/models/premium-vs-standard) for full details.

## Key guides

<CardGroup cols={2}>
  <Card title="Model picker" icon="sliders" href="/models/model-picker">
    How to open the picker, search, filter by provider, pin favorites, and switch models mid-chat.
  </Card>

  <Card title="Premium vs. Standard" icon="star" href="/models/premium-vs-standard">
    Understand the two model tiers, monthly quotas, and what happens when quota is exceeded.
  </Card>

  <Card title="Reasoning models" icon="brain" href="/models/reasoning-models">
    When to use extended-thinking models and how thinking levels work.
  </Card>

  <Card title="Anthropic (Claude)" icon="sparkles" href="/models/providers/anthropic">
    Claude Opus, Sonnet, and Haiku — 200k context, extended thinking.
  </Card>

  <Card title="OpenAI (GPT)" icon="cpu" href="/models/providers/openai">
    GPT-5, GPT-4o, o3, o4-mini, and the full GPT lineup.
  </Card>

  <Card title="Google (Gemini)" icon="layers" href="/models/providers/google">
    Gemini 2.5 and 3.1 — up to 1M token context windows.
  </Card>
</CardGroup>