TTFT Benchmark Ranks Lowest-Latency Inference APIs for Voice and Realtime Agent Use Cases

A new benchmark focused on Time to First Token (TTFT) has ranked major inference API providers specifically for voice and realtime agent applications, where sub-200ms latency is often a hard requirement for acceptable user experience. The benchmark systematically measures cold and warm TTFT across providers under realistic load conditions, providing developers with concrete, comparable data rather than vendor-supplied figures. For teams building voice assistants, live transcription pipelines, or real-time agentic systems, this data directly informs infrastructure and vendor selection decisions. The results highlight meaningful performance gaps between providers that would be invisible in throughput-only benchmarks, making TTFT a critical evaluation axis for latency-sensitive deployments. Developers should use this benchmark as a primary reference when architecting systems where response initiation speed — not just total generation time — determines product quality.