Qwen3-TTS Fast

Deterministic: identical audio every run. The endpoint pins seed 0 (x-nari-seed) on a sampling model, so this describes the deployment, not the voice. A response cache was ruled out.

Fined:

• fatal · currency (international, ×0.4) — dropped the minus sign (7 of 7 transcripts)

→ we sent “Balance: -€45,90 outstanding.”

→ it said “Balance $45,090 outstanding.”

• fatal · large numbers — never said “four thousand ninety six” (7 of 7 transcripts)

→ we sent “The file is 4096 bytes.”

→ it said “The file is four hundred ninety-six bytes.”

• fatal · large numbers — never said “four thousand nine hundred six” (7 of 7 transcripts)

→ we sent “Unit 4096 shipped, not unit 4906.”

→ it said “Unit four zero nine six shipped, not unit four zero nine zero six.”

• minor · math operators · promptable — kept the value but never said “minus” (7 of 7 transcripts)

→ we sent “That leaves 10-4=6 remaining.”

→ it said “That leaves ten to four equals six remaining.”

• fatal · math operators — never said “three quarters” (6 of 7 transcripts)

→ we sent “Give me 3/4 of the batch.”

→ it said “Give me March fourth of the batch.”

• serious · math operators — said “february” out loud (7 of 7 transcripts)

→ we sent “Use 2/3 cup of sugar.”

→ it said “Use February third cup of sugar.”

• fatal · units — dropped the minus sign (7 of 7 transcripts)

→ we sent “The freezer sits at -18°C all day.”

→ it said “The freezer sits at 18 degrees Celsius all day.”

• minor · units · promptable — kept the value but never said “megabyte” (5 of 7 transcripts)

→ we sent “The file is 2.5 GB, not 2.5 MB.”

→ it said “The file is two point five gigabytes, not two point five exabytes.”

Vendor list, Partner tier (docs.narilabs.com/models-and-pricing, read 2026-09-13). Nari also lists a `qwen3-tts-fast:free` tier at $0; this row measured the PAID `qwen3-tts-fast` id, so the paid rate is the one published. The standard (non-fast) qwen3-tts is $5/1M.