A: Hello,

Thank you for reaching out, yes, you can purchase one more code and redeem it under your Billing page. If you're already on Tier 2, redeeming one more code will move you to Tier 3.

When you are on Tier 3, you have access to more models from OpenAI and your limits are increased such as, the amount of chatbots you can create, message limits and knowledge base character limits.

Hope this helps!

All the best,
Oscar