Voice AI Benchmark Report · March 2025
The Voice AI Benchmark. Opal leads the field.
Speed. Intelligence. Audio reasoning. This Voice AI benchmark compares Deepslate Opal against OpenAI, Gemini, ElevenLabs, and more.
Benchmark 01 · Latency
Faster than human reaction time.
In this Voice AI benchmark, latency is felt in milliseconds and noticed in seconds. At 250ms time-to-first-audio-byte, Deepslate Opal enables natural, flowing conversations from EU-hosted infrastructure.
Time-to-First-Audio-Byte
Lower is better · EU Region · March 2025
Tau2-Telecom Bench
Accuracy (%) · Higher is better · v1.4
Benchmark 02 · Model Intelligence
Built for complex CX scenarios.
The Tau2-Telecom Benchmark evaluates Voice AI models on tool calling, intent resolution, and end-to-end workflow completion in enterprise telecom contexts.
With a 71% accuracy rate, Opal outperforms Llama 3.3 70B, GPT-5.2, and Gemini 2.5 Flash in industry-specific tasks.
Benchmark 03 · Speech Reasoning
Direct audio understanding at the top of the field.
The Speech-to-Speech API processes speech natively, extracting nuance and complex context directly from the raw audio stream.
The Big Bench Audio test measures exactly that. Opal scores 90 out of 100, placing it at the top of the Voice AI benchmark leaderboard.
Big Bench Audio v2.1
Score (0–100) · Higher is better
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If you have questions email us at info@deepslate.eu