Cartesia Managed Agents voice agent reaches an Elo of 1115
Cartesia Managed Agents achieved an Elo of 1115 on the Artificial Analysis Speech Agent Arena, 98 points higher than the previous Cartesia Line (1017), with task success rate rising from 77.5% to 91.7%. The platform is Cartesia's fully managed voice agent solution, running in a cascade around a developer-selected LLM with its self-developed Ink speech-to-text and Sonic text-to-speech models; this evaluation used GPT-5.5 with the Skylar and Daniel voices. On agent tasks requiring tool calls, the Elo was 1112.
Body
Cartesia Managed Agents scores an Elo of 1115 on the Artificial Analysis Speech Agent Arena, 98 points above Cartesia's earlier voice agent product, Cartesia Line, with Task Success Rate up from 77.5% to 91.7%
Managed Agents is @CartesiaAI's fully managed platform for building and deploying voice agents. It is a cascaded system: Cartesia's own Ink Speech to Text and Sonic Text to Speech models run around an LLM of the developer's choice. We evaluated Cartesia Managed Agents with GPT-5.5 as the LLM and the Skylar and Daniel voices.
Key takeaways:
➤ Speech Agent Arena: Cartesia Managed Agents scores an Elo of 1115 (95% CI 1086-1144, 685 samples), 98 points above Cartesia Line at 1017 (95% CI 985-1049)
➤ Agentic tasks: On tasks that need tool calls, Cartesia Managed Agents scores an Elo of 1112
➤ Task Success Rate: 91.7% of eligible tool-calling conversations end with the correct final task-completing tool call
Congrats to the @CartesiaAI team!
See below for more details ⬇️