Model comparison
| Model | Credit usage | Best for | Availability | Underlying model |
|---|---|---|---|---|
| Max | High | Complex reasoning, multi-document work, long summaries | All platforms (Plus plan and above) | Claude Sonnet 4.5 |
| Fast | Medium | Space-level questions, deeper analysis, longer conversations | All platforms | Claude Haiku 4.5 |
| Core | Low | Everyday in-document queries, balanced performance | All platforms | ChatGPT Nano 5.1 |
| On-device | Free | Short rewrites, quick transformations, simple questions | Mac, iPad, iPhone (document level only) | LLaMa 3.2 1B and 3B + any models available on your device |
Credit usage estimates
With 50 credits, you can run approximately:| Model | Approx. queries |
|---|---|
| Max | ~30 |
| Fast | ~100 |
| Core | ~1,000 |
| On-device | Unlimited (no credits) |
These are rough averages from testing. Actual usage varies with prompt complexity, document length, and the amount of context processed.
When to choose each model
On-device
Use for quick edits, sentence rewrites, and simple clarifications. Fast and private. No credit usage. Best for:- Fixing grammar or spelling
- Rewording a sentence
- Simple style adjustments
- Quick format changes
- Document-level only (no space queries)
- Limited context window
- Best for shorter content
Core
Use for most general-purpose questions within a document. Balanced speed and capability. Best for:- Summarizing a single document
- Answering questions about current content
- Extracting key points
- General writing assistance
- Most cost-effective cloud model
- Good for frequent, everyday tasks
Fast
Use for broad, Space-level queries or when the task requires deeper analysis. Best for:- Searching across multiple documents
- Complex space-level queries
- Longer conversations
- Tasks requiring more context
- Questions that span multiple documents
- Deeper analytical work
- Multi-turn conversations
Max
Use for long, structured outputs, multi-document synthesis, or anything requiring advanced reasoning. Best for:- Research-level summarization
- Complex multi-document analysis
- Advanced reasoning tasks
- High-quality, structured outputs
- Plus plan or higher
- Higher credit cost per query
Start with Core for most tasks. Upgrade to Fast for space-level queries. Reserve Max for complex work requiring the highest quality. Use On-device whenever possible for privacy and zero credit cost.
Switching models
You can change models at any time during a conversation:
Your conversation context is preserved when switching models.
Model availability by platform
| Platform | On-device | Core | Fast | Max |
|---|---|---|---|---|
| macOS | ✓ (document) | ✓ | ✓ | ✓ (Plus+) |
| iOS | ✓ (document) | ✓ | ✓ | ✓ (Plus+) |
| Windows | – | ✓ | ✓ | ✓ (Plus+) |
| Web | – | ✓ | ✓ | ✓ (Plus+) |