Nari TTS and STT Are Now Available Through Speko Router

TL;DR

Nari Qwen3-TTS and Nari Qwen3-ASR are now available through Speko Router. Both Fast and Standard endpoints are routable.

Speko also benchmarks the Fast endpoints. Qwen3-TTS Fast ranks #1 in first-audio latency, and Qwen3-ASR Fast ranks #1 in finalize latency.

Available models

All four Nari endpoints are available through Speko Router:

qwen3-tts-fast and qwen3-tts
qwen3-asr-fast and qwen3-asr

Use the Fast endpoints when latency is the priority. Use Standard when cost matters more. Speko Router keeps the same API across both and can route automatically or pin a specific model.

Text-to-Speech

Nari Qwen3-TTS Fast ranks #1 in Speko’s US East time-to-first-audio benchmark at 37 ms p50 and 38 ms p90.

The next-fastest result is 49 ms p50 and 56 ms p90. Nari is 24% lower at p50 and 32% lower at p90.

Speko estimates Nari at ~1,536 naturalness Elo, above the benchmark’s 1,500 field average. Qwen3-TTS Fast is priced at $10 per 1 million characters.

For a limited time, Qwen3-TTS Standard is available for $4 per 1 million characters.

Speko benchmark card for Nari Qwen3-TTS Fast showing naturalness of 1536 and cost of $10 per million characters — Speko’s live result card for Nari Qwen3-TTS Fast.

Speech-to-Text

Nari Qwen3-ASR Fast ranks #1 in Speko’s US East commit-to-final benchmark at 33 ms p50 and 45 ms p90.

Nari also ranks #2 in conversational WER at 10.3%, behind ElevenLabs Scribe v2 Realtime at 9.6% and ahead of AssemblyAI Universal-3.5 Pro at 10.4%. It records 3.2% WER on Speko’s read-speech streaming test.

At $0.002 per minute, or $0.12 per hour, Qwen3-ASR Fast also costs less than most of the leading accuracy results on the board.

Speko benchmark card for Nari Qwen3-ASR Fast showing 33 millisecond finalize latency, 3.3% batch WER, and $0.002 per minute — Speko’s live result card for Nari Qwen3-ASR Fast.

Speko measures this after a client commit, with turn detection disabled. For applications that already handle end-of-turn detection, 33 ms is the remaining wait before the agent can respond.

Get started

Create a Speko API key and choose any of the four Nari routes.

Try Nari through Speko Router

Benchmark values in this post reflect Speko’s live TTS and STT boards accessed September 26, 2026. Rankings can change as Speko adds models or re-runs measurements.