A: Happy to explain this further:

= Native Al models (Azure GPT3.5, GPT-4, GPT-4 Omni, Claude Haiku, v3.5 Sonnet)
Tier 1 gets access to GPT3.5, GPTo Mini, and Claude Haiku. Tier 2 and Tier 3 users get access the previous models and also GPT4, GPT40, Claude 3.5 Sonnet. But all tiers get unlimited usage in Afforai. Afforai supports and offers these Al models natively inside Afforai. You can use these models with no limit.

= Bring Your Own Key via OpenRouter (GPT, Claude, Sonnet, Gemini, etc)
You can connect your API key via OpenRouter, allowing you to use other Al models in the market that we don't offer natively. But you will pay for your own usage via OpenRouter. Tier 1 users can use this feature to access GPT4, GPT40, Claude Sonnet etc but Tier 1 users will have to pay for their own usage instead of Tier 2 and Tier 3 users getting it free, included.

=> API credits
APl is meant for developers to be able to leverage Afforai using our API endpoint to build new tools using our API. Researcher can use our web app to research, read, and writer papers. API credits are a one time deposit and once you use it up, you can replenish by purchasing our API credit packages.