New OpenAI and xAI models

Newly released frontier models from OpenAI
 and xAI/Grok
 are now available in Text AI Agents
.
If you pin your provider to OpenAI, you can now select GPT 5.6 Luna or GPT 5.6 Terra
If you pin your provider to Grok/xAI, you can now select Grok 4.5 Medium or Grok 4.5 High
All four of these new options performed very well in robust testing with various agents. To know what works best for you, we always recommend testing your agent.
If you're not sure which model to select, we always recommend selecting Lightning Auto
 as the provider and Optimized
 as the model, which lets the brayv.ai lightning
 system pick a model for you dynamically that the system determines will handle your current agent configuration well. Optimized
 will only ever run your agent with a "frontier" model (ie the most generally capable ones).
regardless of pinned model,
brayv.ai
always allows fallback to other equivalent models if selected model fails to respond after multiple retries to ensure your agents are able to respond to your contacts.