audio model comparison
Eleven Flash v2.5 vs TTS-1
Eleven Flash v2.5 and TTS-1 are both current audio models, from ElevenLabs and OpenAI. TTS-1 is 63% cheaper per character than Eleven Flash v2.5, $0.000015 vs $0.00004. On Artificial Analysis Speech Arena, Eleven Flash v2.5 scores 1078 Elo and TTS-1 1090 Elo (Artificial Analysis, measured October 13, 2026).
Data verified October 13, 2026 · Dataset 2026-10-13
Side by side
Standard-tier prices in effect today. The better value in each row is highlighted.
| Fact | Eleven Flash v2.5 | TTS-1 |
|---|---|---|
| Price per character | $0.00004 | $0.000015 (better) |
| Artificial Analysis Speech Arena | 1078 Elo (#11 of 11) | 1090 Elo (#9 of 11) (better) |
| Provider | ElevenLabs | OpenAI |
| Release date | Not reported | Not reported |
| Access | API only | API only |
| Context window | Not reported | Not reported |
| Max output | Not reported | Not reported |
| Input | text | text |
| Output | audio | audio |
When to choose each
Eleven Flash v2.5
Best for
- Low-latency multilingual speech
Watch out for
- Built for latency rather than expressiveness; Eleven v4 Turbo now sells at the same $0.04 per 1,000 characters
TTS-1
Best for
- Low-latency text-to-speech
Watch out for
- OpenAI no longer lists TTS-1 on its models overview, though its model page and $15 per 1M characters price remain
Eleven Flash v2.5 vs TTS-1 FAQ
Which is cheaper, Eleven Flash v2.5 or TTS-1?
TTS-1 is 63% cheaper per character than Eleven Flash v2.5, $0.000015 vs $0.00004.
Which scores higher on independent benchmarks, Eleven Flash v2.5 or TTS-1?
TTS-1 leads on Artificial Analysis Speech Arena, 1090 Elo to 1078 Elo. Scores are independent evaluations, not either vendor's launch figures.
Related comparisons
Production evaluation
Choosing between Eleven Flash v2.5 and TTS-1?
Public benchmarks narrow the shortlist. We run both on your own tasks, data and cost limits, then build the routing and review controls to run the winner in production.
- A head-to-head evaluation on your real workload
- Routing between models by cost and difficulty