Paxa
paxa-tts-flash-v1
Measured 2026-09-28
Run paxa-tts-flash-v1 on Speko →One API, every model on this board.
Naturalness
1325
Win % · 95% CI
—
Drift
0
Measured 2026-09-28. All 20 takes differ, but barely: mean pairwise distance 0.0087, against 0.0959 for Deepgram aura-2.
Synth p50
389ms
389–445 p50–p90
Two n=100 sweeps from US East on 2026-10-10 read p50 372 and 405. Cartesia reproduced its cell in the same runs; Deepgram ran 9–12% slow and Inworld 10% fast.
Robustness
0.25
Fined:
• fatal · currency — never said “three point two million” (48 of 49 transcripts)
→ we sent “We raised $3.2M in the seed round.”
→ it said “We raised some toong dalaam in the seed round.”
• fatal · large numbers — never said “three point four million” (35 of 49 transcripts)
→ we sent “The clip hit 3.4M views and 1.2k shares.”
→ it said “The clip hit three point four M views and one point two K shares.”
• fatal · math operators — never said “to the power of ten” (32 of 49 transcripts)
→ we sent “Since 2^10=1024, it fits in one block.”
→ it said “Since two ten equals one thousand twenty-four it fits in one block.”
+ 28 more fined
Cost / 1M chars
$10.0
Paxa bills speech at 10 credits per 1,000 characters, $10 per one million characters (paxalabs.com/docs/credits, read 2026-10-06). A credit costs $0.001 on refill (10,000 for $10), and live calls on 2026-10-06 were charged 0.01 credit per character. This row read $15 from the 2026-09-12 pricing page until then. Billing is on input characters.
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