April 29, 2026
LLM Model Updates & Cartesia Speed Control GPT-5.5 LLM Model Support OpenAI's GPT-5.5 model is now available as a managed LLM in the Voice Agent API. GPT-5.5 is an Advanced tier model. Set the model i…
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- OpenAI's GPT-5.5 model is now available as a managed LLM in the Voice Agent API