Data read October 27, 2026
Gradium TTS vs Paxa TTS Flash v1: TTS API comparison
Speed cannot be compared: Coval does not measure Paxa TTS Flash v1, so it has no P95 here.
Listener Elo is not available for both models, so voice preference is not compared. List price per million characters: $36 to $57.80 for Gradium TTS, $10 for Paxa TTS Flash v1.
Gradium TTS is ranked 1 of 23; Paxa TTS Flash v1 is not in the multilingual speed ranking. Every comparison on this site uses Gradium TTS as its fixed reference, and no page says either model is better overall.
| Measure | Gradium TTS | Paxa TTS Flash v1 | Ahead |
|---|---|---|---|
| Rank in the multilingual speed ranking | 1 | not ranked | n/a |
| Speed tier | Headroom | n/a | n/a |
| Median time to first audio (ms), lower is faster | 53.7 | n/a | n/a |
| P95 time to first audio (ms), lower is faster | 104.3 | n/a | n/a |
| Listener Elo (Artificial Analysis) | 1,174 | n/a | n/a |
| Customer-service Elo (Artificial Analysis) | 1,241 | n/a | n/a |
| Naturalness (Speko) | 1,592 | 1,325 | Gradium TTS |
| Naturalness estimate (Cekura, 1 to 5) | 4.51 | n/a | n/a |
| Reading accuracy (Cekura) | 79.5% | n/a | n/a |
| Hard passages judged correct (Artificial Analysis) | n/a | n/a | n/a |
| Lowest list price per 1M characters (lower is cheaper) | $36 to $57.80 | $10 | Paxa TTS Flash v1 |
| Languages tested (Artificial Analysis, Speko) | 4 | 1 | Gradium TTS |
| Access | Proprietary | n/a | n/a |
| Streaming status | Measured | Measured | n/a |
Ahead is computed from the figures only. A latency gap under 10 ms is a tie; listener Elo values whose 95% intervals overlap are a tie. A measure one benchmark does not hold is n/a for that model and is never estimated. See the methodology and each model page for sources.
Frequently asked questions
- Is Gradium TTS faster than Paxa TTS Flash v1?
- Speed cannot be compared: Coval does not measure Paxa TTS Flash v1, so it has no P95 here.
- How do Gradium TTS and Paxa TTS Flash v1 compare on voice quality?
- Listener Elo is not available for both models, so voice preference is not compared.
- Which is cheaper, Gradium TTS or Paxa TTS Flash v1?
- List price per million characters: $36 to $57.80 for Gradium TTS, $10 for Paxa TTS Flash v1.