AI / Claude Models Basics Interview Questions
What are the claude.ai plans and what models does each tier include access to?
claude.ai offers consumer and business plans, each with different model access and usage limits. The model you can use in the chat interface depends on your subscription tier.
| Plan | Models available | Usage limits |
|---|---|---|
| Free | Claude (typically Haiku or Sonnet) | Limited — daily message caps |
| Pro | Sonnet and Opus models; access to latest releases | 5x more than Free; priority access |
| Team | Same as Pro + admin controls | Higher limits than Pro; per-seat billing |
| Enterprise | All models; SSO; advanced security | Custom — highest limits; unlimited seat licensing |
| Max | All models including the latest | Maximum available — designed for heaviest users |
Model selection in claude.ai:
- Users can select their preferred model in the conversation interface (on Pro and higher plans)
- The Free plan may automatically route to faster, smaller models to manage capacity
- Model selection in the UI is separate from API access — you need an API key and pay separately for API usage
- claude.ai is an Anthropic product; the API is a separate offering for developers
For the API, you choose the model by specifying the model ID in each request — there is no concept of a 'default model' in the API; you must always specify one explicitly.
How does a developer specify which Claude model to use in an API request?
What is the difference between claude.ai and the Claude API in terms of billing?
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