Opening the Picker
The current model name is displayed as a clickable button on the left side of the prompt bar at the bottom of the chat interface.Click the model name in the prompt bar
Find the model name button in the bottom-left of the prompt bar. It shows the currently active model (for example, “Claude Sonnet 4.6” or “GPT-5”). Click it to open the model picker panel.
The picker opens as a panel or modal
The picker slides open with a full, scrollable list of available models. Each model appears as a card showing the model name, provider, and tier (Standard or Premium).
Browse, filter, or search
Use the search bar at the top of the picker to filter by model name (type “claude”, “gpt-5”, “gemini”, etc.). Use the provider sidebar on the left to filter by provider. Use the type tabs to switch between Text and Image model views.
Switching models mid-conversation applies to new messages only. Prior messages in the conversation remain unchanged, and the full conversation history is sent to the new model as context.
Picker Interface
Search Bar
Type any part of a model name to filter the list in real time. Examples: “claude”, “gemini pro”, “gpt”, “flux”, “deepseek”. The search covers model names and provider names.Provider Filter
The left sidebar of the picker lists all 19 providers. Click any provider name to show only that provider’s models:- All (default)
- OpenAI
- Anthropic
- Mistral
- DeepSeek
- Cohere
- xAI
- Perplexity
- Qwen
- Groq
- OpenRouter
- Kimi K2
- Venice
- TheSys
- ZAI
- Inception
- ByteDance
- And more
Type Filter
Tabs at the top of the picker switch between model types:- Text — all chat and reasoning models
- Image — image generation models (also available when using the Image tool or navigating to
/studio/images)
Standard vs. Premium Badge
Each model card displays a badge:| Badge | Meaning |
|---|---|
| Standard | Does not count against your premium message quota. Available in unlimited quantities on all paid plans. |
| Premium | Counts against your monthly premium message quota (e.g., 555/month on Pro). Not available on the Free plan. |
Capabilities Indicators
Each model card shows key capability indicators, visible by hovering over the info icon or expanding the card:| Indicator | Meaning |
|---|---|
| Context window | Maximum tokens the model can process at once (e.g., 200k for Claude Sonnet 4.6, 1M for Gemini 2.5 Pro) |
| Vision support | Whether the model can analyze images attached to messages |
| Tool use | Whether the model supports function calling / tool use (required for agent mode, web search, and connectors) |
| Reasoning / Thinking | Whether the model supports the thinking level slider for extended reasoning |
Common Context Windows
| Model | Context Window | Approximate Length |
|---|---|---|
| Gemini 2.5 Pro | 1,000,000 tokens | ~750,000 words |
| Claude Sonnet 4.6, Opus 4.6 | 200,000 tokens | ~150,000 words |
| GPT-4o | 128,000 tokens | ~96,000 words |
| GPT-5 | 128,000 tokens | ~96,000 words |
| Mistral Large | 128,000 tokens | ~96,000 words |
| DeepSeek Chat | 64,000 tokens | ~48,000 words |
Selecting a Model
Optional: filter by provider or type in the search bar
Narrow the list to find the model you want faster.
Changing the model in one chat does not affect any other chat. Each conversation maintains its own model selection independently.
Pinning Favorite Models
If you use certain models frequently, pin them to the top of the picker for instant access without scrolling.Hover over a model card in the picker
Move your cursor over the model card to reveal the action icons on the right side of the card.
Click the star icon
Click the star (or pin) icon. The model is now pinned and will appear in a Favorites section at the very top of the picker, above all other categories.
Access pinned models instantly
The next time you open the picker, your pinned models appear at the top of the list — no scrolling or filtering needed.
Reasoning Models and the Thinking Level Slider
Several models in ZeroTwo support extended reasoning — they work through a problem step-by-step before producing a final response. When you select a reasoning-capable model, a thinking level slider appears in the prompt bar. Models with reasoning / thinking support:- OpenAI o3, o4-mini
- DeepSeek Reasoner
- Claude Sonnet 4.6 and Opus 4.6 (with extended thinking enabled)
Thinking Levels
| Level | Behavior | Best For |
|---|---|---|
| Low | Minimal internal reasoning, faster response | Simple questions, quick tasks, iteration |
| Medium | Moderate reasoning depth, balanced speed | Most everyday tasks |
| High | Deep, thorough step-by-step reasoning | Complex math, algorithmic coding, detailed analysis |
Higher thinking levels consume more tokens and result in longer response times. On plans with premium quotas, a “High” reasoning response uses more of your monthly quota than a standard response.
Switching Models Mid-Conversation
You can switch models at any point in an active conversation without losing any context:- Click the model name in the prompt bar
- Select a different model from the picker
- Send your next message — it is handled by the new model
- Start with a fast standard model for early brainstorming
- Switch to a reasoning model (o3, DeepSeek Reasoner) when the problem gets complex
- Switch to Perplexity Sonar when you need live web-grounded answers
- Switch to a large-context model (Gemini 2.5 Pro) when pasting in a large document
Image Model Selection
When you enable image generation — either via the Image tool pill in the prompt bar or by navigating to/studio/images — the picker updates to show available image generation models:
- GPT-Image-1, GPT-Image-1.5, GPT-Image-mini
- Flux Pro v1.1, Flux Pro v2
- Imagen 4.0
- Grok Imagine, Grok Imagine Pro
- Qwen Image, Qwen Edit
- LustIFY SDXL and other models
Related Pages
- Models Overview — full list of all text, image, video, and audio models organized by provider
- Plans and Pricing — which models count as premium and how quotas work
- Answer Quality and Limitations — guidance on choosing models for specific task types
- Chat Interface Overview — full tour of the prompt bar and tool pills