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Why Switch Models?

Different AI models excel at different tasks. Switching models lets you leverage each model’s unique strengths without starting a new conversation.
You can switch models mid-conversation without losing context - ZeroTwo maintains the conversation history across all models.

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How to Switch Models

1

Open Model Selector

Click the current model name in the top bar or press Cmd/Ctrl + M
The model selector shows a badge with the current model’s icon and name.
2

Browse Available Models

Models are organized by provider:
  • OpenAI (GPT-4o, GPT-5, O3, O4-mini)
  • Anthropic (Claude Sonnet 4, Claude 3.5)
  • Google (Gemini 2.5 Pro, Gemini Flash)
  • And 10+ more providers
3

Select New Model

Click on any model to switch immediately. The conversation context transfers automatically.
4

Continue Chatting

Your next message uses the newly selected model. Previous messages remain unchanged.
Each message in your conversation shows which model generated it with a small icon badge.

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Model Selection Guide

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For Code Generation & Debugging

GPT-4o

Best for: General coding tasks
  • Clean, well-commented code
  • Multiple languages
  • Fast responses
  • Good debugging help

Claude Sonnet 4

Best for: Complex algorithms
  • Advanced code reasoning
  • Refactoring suggestions
  • Architecture design
  • Code reviews

O3 / O4-mini

Best for: Algorithm design
  • Complex logic problems
  • Mathematical algorithms
  • Performance optimization
  • Edge case handling

DeepSeek Reasoner

Best for: Problem solving
  • Step-by-step reasoning
  • Algorithm explanation
  • Logic verification
  • Testing strategies
Example workflow: 
1. Use GPT-4o to write initial code
2. Switch to Claude Sonnet 4 for refactoring
3. Switch to O3 for optimization

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For Writing & Content

GPT-4o

Best for: General writing
  • Blog posts
  • Marketing copy
  • Emails
  • Creative content

Claude Sonnet 4

Best for: Long-form content
  • Technical documentation
  • Reports
  • Research papers
  • Detailed articles

GPT-5

Best for: Creative writing
  • Stories
  • Scripts
  • Poetry
  • Brand messaging

Mistral Large

Best for: Multilingual
  • Translation
  • International content
  • Cultural adaptation
  • Multiple languages
Example workflow: 
1. Use GPT-4o for initial draft
2. Switch to Claude Sonnet 4 for expansion
3. Switch to GPT-5 for creative polish

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For Research & Analysis

Perplexity Sonar Pro

Best for: Current information
  • Real-time data
  • Recent events
  • Market research
  • Cited sources

Claude Sonnet 4

Best for: Document analysis
  • Long documents (200K+ tokens)
  • Research papers
  • Legal documents
  • Detailed summaries

Gemini 2.5 Pro

Best for: Data analysis
  • Large datasets
  • Visual analysis
  • Trend identification
  • Insights generation

Qwen Max

Best for: Multilingual research
  • International sources
  • Cross-language analysis
  • Global perspectives
  • Translation
Example workflow: 
1. Use Perplexity for latest information
2. Switch to Claude for deep analysis
3. Switch to Gemini for visualization

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For Multimodal Tasks

Gemini 2.5 Pro

Best for: Image understanding
  • Photo analysis
  • Chart reading
  • Visual Q&A
  • Design feedback

GPT-4o

Best for: General vision
  • Image descriptions
  • Document OCR
  • Diagram analysis
  • Visual reasoning

Claude Sonnet 4

Best for: Document images
  • Screenshot analysis
  • Scanned documents
  • Complex diagrams
  • Multi-page PDFs

Qwen Max

Best for: Asian content
  • Chinese text in images
  • Asian language OCR
  • Cultural context
  • Regional images

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For Speed & Efficiency

GPT-4o-mini

Speed: Ultra-fastQuick responses for simple tasks

Gemini 2.5 Flash

Speed: Very fastFast multimodal processing

Groq Llama 3.3

Speed: FastestNear-instant responses

Mistral Small

Speed: FastQuick, efficient results
When to prioritize speed:
  • Quick questions
  • Simple tasks
  • Brainstorming
  • Iteration loops

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For Reasoning & Logic

O3

Reasoning: Advanced
  • Complex math
  • Logic problems
  • Strategic thinking
  • Multi-step reasoning

DeepSeek Reasoner

Reasoning: Transparent
  • Shows thinking process
  • Step-by-step logic
  • Verification
  • Problem decomposition

Qwen Thinking

Reasoning: Reflective
  • Self-correction
  • Alternative approaches
  • Uncertainty handling
  • Meta-reasoning

Claude Sonnet 4

Reasoning: Balanced
  • Clear explanations
  • Logical structure
  • Ethical reasoning
  • Nuanced analysis

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Model Comparison

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Context Window Sizes

ModelContext WindowBest For
Claude Sonnet 4200K tokensVery long documents
Gemini 2.5 Pro1M+ tokensMassive documents
GPT-4o128K tokensLong conversations
DeepSeek64K tokensExtended reasoning
Groq Llama 3.332K tokensQuick tasks
1 token ≈ 0.75 words. A 200K token context can handle ~150K words or ~300 pages of text.

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Speed Comparison

Fastest → Slowest:
  1. 🚀 Groq Llama 3.3 - Ultra-fast inference
  2. ⚡ Gemini 2.5 Flash - Very fast multimodal
  3. 🏃 GPT-4o-mini - Quick responses
  4. 🚶 GPT-4o - Balanced speed
  5. 🐢 O3 - Slower but thorough reasoning

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Cost Efficiency

Most Efficient → Premium:
  1. 💰 GPT-4o-mini / Mistral Small
  2. 💰💰 GPT-4o / Gemini Flash
  3. 💰💰💰 Claude Sonnet / Gemini Pro
  4. 💰💰💰💰 GPT-5 / O3 / Claude Opus
Use efficient models for iteration, then switch to premium models for final output.

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Strategic Model Switching

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Workflow Patterns

Pattern 1: Draft → Refine → Polish
1

Draft (Fast Model)

Model: GPT-4o-mini
Task: Generate initial outline or draft quickly
2

Refine (Balanced Model)

Model: GPT-4o or Claude Sonnet 4
Task: Expand and improve content
3

Polish (Premium Model)

Model: GPT-5 or Claude Opus
Task: Final refinement and quality check
Pattern 2: Research → Analyze → Summarize
1

Research (Web-Enabled)

Model: Perplexity Sonar Pro
Task: Gather current information with citations
2

Analyze (Long Context)

Model: Claude Sonnet 4 or Gemini 2.5 Pro
Task: Deep analysis of gathered information
3

Summarize (Clear Communication)

Model: GPT-4o
Task: Create clear, actionable summary
Pattern 3: Code → Review → Optimize
1

Code (Fast Generation)

Model: GPT-4o
Task: Write functional code quickly
2

Review (Quality Check)

Model: Claude Sonnet 4
Task: Review for best practices and improvements
3

Optimize (Advanced Reasoning)

Model: O3 or DeepSeek Reasoner
Task: Optimize algorithms and performance

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Model-Specific Tips

Strengths:
  • Excellent instruction following
  • Strong at creative tasks
  • Good code generation
  • Fast responses
Best prompting:
  • Be direct and clear
  • Provide examples
  • Specify format preferences
Avoid:
  • Extremely long documents (use Claude)
  • Very recent information (use Perplexity)
Strengths:
  • Longest context window
  • Excellent for analysis
  • Thoughtful, nuanced responses
  • Strong ethical reasoning
Best prompting:
  • Give comprehensive context
  • Ask for detailed analysis
  • Request step-by-step thinking
Avoid:
  • Ultra-fast iteration needs (use GPT-4o-mini)
  • Real-time information (use Perplexity)
Strengths:
  • Multimodal excellence
  • Massive context window
  • Fast processing
  • Good with data
Best prompting:
  • Combine text with images
  • Reference multiple sources
  • Ask for visual analysis
Avoid:
  • Very specialized coding tasks
  • Pure text when speed is critical
Strengths:
  • Complex problem solving
  • Mathematical reasoning
  • Logic and proofs
  • Strategic thinking
Best prompting:
  • Present complex problems
  • Ask for step-by-step solutions
  • Request multiple approaches
Avoid:
  • Simple, quick tasks
  • Creative writing
  • General questions
Strengths:
  • Real-time web access
  • Cited sources
  • Current events
  • Fact-checking
Best prompting:
  • Ask for recent information
  • Request citations
  • Compare current data
Avoid:
  • Historical analysis
  • Creative tasks
  • Code generation

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Setting a Default Model

Choose your preferred starting model:
  1. Go to Settings > Preferences
  2. Find Default Model section
  3. Select your preferred model
  4. Save changes
Your default model is used for new conversations. You can still switch to any model at any time.

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Model Availability by Subscription

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Free Tier

  • GPT-4o-mini
  • Gemini 2.5 Flash
  • Mistral Small
  • Limited messages per day

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Pro Tier ($20/month)

  • All Free tier models
  • GPT-4o, GPT-4.1
  • Claude 3.5 Sonnet/Haiku
  • Gemini 2.5 Pro
  • Most models unlimited

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Premium Tier ($40/month)

  • All Pro tier models
  • GPT-5, O3
  • Claude Sonnet 4, Opus 4
  • Unlimited usage
  • Priority access
Start with Free tier to learn model differences, then upgrade based on your most-used models.

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Troubleshooting

Check:
  • Internet connection
  • Platform status
  • Subscription tier for premium models
  • Try switching to another model
Solution:
  • Context transfers automatically
  • Try refreshing the page
  • Check if conversation is too long
  • Start a new chat if needed
This is normal:
  • Different models have different capabilities
  • Each model has unique strengths
  • Results vary by design
  • Use this to your advantage!

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Next Steps

Model Providers

Learn about all available AI providers

Upload Files

Work with documents in your conversations

Advanced Features

Explore Canvas, Web Search, and more

Best Practices

Master effective prompting techniques
Experiment with different models to discover which works best for your specific needs!