🚨 Action Required: Transition your legacy Agentforce Builder model

What’s Changing? 

OpenAI is deprecating the GPT-4o model currently powering our legacy Agentforce Builder reasoning engine.  Starting October 15, 2026, you have two options to keep your agents running smoothly: 

• Option 1 (recommended): Upgrade to the new Agentforce Builder
  • Move your agent to our new builder to unlock enhanced features and long-term support. Review this Help article for instructions on how to upgrade your agent to the new Agentforce Builder.

• Option 2: Change the reasoning engine model on your agent within the legacy builder 
  • Toggle your reasoning engine to the newly supported OpenAI GPT-5.6 Luna model. Review this Help article for instructions.

Next Steps & Testing:

Changing your reasoning engine model or migrating to the new builder can impact your agent’s responses. We strongly recommend testing your agent thoroughly and updating its configuration as needed to ensure expected behavior before switching in production. 

Please reference the Help articles linked above for next steps on how to change the model in the legacy builder or consider migrating the agent to the new Agentforce Builder. 

Explore the 🆕 Agentforce Builder with Agent Script 

Explore the Agentforce deployments that are in production today with customers using the new Agentforce Builder. 

Read more about the new Agentforce Builder and here’s the page for you to learn about Agent Script. 

🗣️ Questions specific to your Agentforce deployment

Please reach out to your Account Executive if you have additional questions or need support.