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Check out our guides for creating voice agents with Mercury 2.5 in ElevenLabs and Vapi. Mercury 2.5 plugs in easily to ASR → LLM → TTS voice agent workflows, providing quality and latencies that are competitive with non-reasoning small frontier models and reasoning models served on specialized hardware. Set your Inception API key:
Install the SDK:
Try a request:
We recommend temperature=0.75 and reasoning_effort="medium" for Mercury 2.5 in most voice use cases. For tool-calling workflows, a lower temperature may be appropriate, e.g., temperature=0.6. You can also try out reasoning_effort="low" and realtime=true for ultra-low latency, especially TTFT-sensitive workflows. Since Mercury 2.5 is a reasoning model, we recommend setting max_completion_tokens to at least 3,000 for reasoning_effort="medium", adjusting as needed according to reasoning effort.