Data read October 27, 2026
Gradium TTS vs Google Chirp 3: HD: TTS API comparison
On P95 latency, Gradium TTS is faster: 104.3 ms for Gradium TTS against 917.2 ms for Google Chirp 3: HD.
On Artificial Analysis listener Elo, Gradium TTS is ahead (1,174 for Gradium TTS, 1,061 for Google Chirp 3: HD). List price per million characters: $36 to $57.80 for Gradium TTS, $30 for Google Chirp 3: HD.
Gradium TTS is ranked 1 of 23; Google Chirp 3: HD is ranked 22 of 23. Every comparison on this site uses Gradium TTS as its fixed reference, and no page says either model is better overall.
| Measure | Gradium TTS | Google Chirp 3: HD | Ahead |
|---|---|---|---|
| Rank in the multilingual speed ranking | 1 | 22 | n/a |
| Speed tier | Headroom | Visible delay | n/a |
| Median time to first audio (ms), lower is faster | 53.7 | 534.1 | Gradium TTS |
| P95 time to first audio (ms), lower is faster | 104.3 | 917.2 | Gradium TTS |
| Listener Elo (Artificial Analysis) | 1,174 | 1,061 | Gradium TTS |
| Customer-service Elo (Artificial Analysis) | 1,241 | 1,108 | Gradium TTS |
| Naturalness (Speko) | 1,592 | n/a | n/a |
| 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 | $30 | Google Chirp 3: HD |
| Languages tested (Artificial Analysis, Speko) | 4 | 5 | Google Chirp 3: HD |
| Access | Proprietary | Proprietary | 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 Google Chirp 3: HD?
- On P95 latency, Gradium TTS is faster: 104.3 ms for Gradium TTS against 917.2 ms for Google Chirp 3: HD.
- How do Gradium TTS and Google Chirp 3: HD compare on voice quality?
- On Artificial Analysis listener Elo, Gradium TTS is ahead (1,174 for Gradium TTS, 1,061 for Google Chirp 3: HD).
- Which is cheaper, Gradium TTS or Google Chirp 3: HD?
- List price per million characters: $36 to $57.80 for Gradium TTS, $30 for Google Chirp 3: HD.