On February 24, 2026, OpenAI announced the release of significant API enhancements aimed at improving voice command reliability and boosting agent processing speeds for developers. The introduction of the new gpt-realtime-1.5 model is a key upgrade for the real-time API, promising more dependable voice command functionality. Internal tests by OpenAI revealed improvements, including a ten percent increase in accuracy for transcribing numbers and letters, a five percent enhancement in handling logical audio tasks, and a seven percent gain in following instructions effectively. Additionally, the audio model has been updated to version 1.5.
Another major update involves the Responses API, which now includes support for WebSockets. This feature establishes a persistent connection, allowing only new data to be transmitted, rather than resending the entire context with each request. OpenAI claims this update enhances the speed of complex AI agents, especially those requiring numerous tool calls, by 20 to 40 percent. These upgrades mark a significant step forward in optimizing API performance for developers working with voice commands and AI agents.