Today for 'Use AI' columns, Clay requires 30,000 TPM (tokens per minute) for the "Create or modify content" use case, and 450,000 TPM for "Web research (Claygent)".
The "Create or modify content" use case will work with any tier, as long as the API key has access/can be used. To use Claygent, you will need a Tier 2 API key from OpenAI, as it supports the required TPM rates.