audio model comparison
AssemblyAI-TTS-1 vs Eleven v4 Turbo
AssemblyAI-TTS-1 and Eleven v4 Turbo are both current audio models, from AssemblyAI and ElevenLabs. AssemblyAI-TTS-1 is 63% cheaper per character than Eleven v4 Turbo, $0.000015 vs $0.00004. On Artificial Analysis Speech Arena, AssemblyAI-TTS-1 scores 1221 Elo and Eleven v4 Turbo 1331 Elo (Artificial Analysis, measured November 3, 2026).
- Higher Artificial Analysis Speech Arena
- Eleven v4 Turbo1331 Elo against 1221 Elo
- Lower price per character
- AssemblyAI-TTS-1$0.000015 against $0.00004
- Newer release
- AssemblyAI-TTS-1Oct 2026 against Sep 2026
Data verified November 3, 2026 · Dataset 2026-11-03
Side by side
AssemblyAI-TTS-1 and Eleven v4 Turbo, line by line
Prices in effect today, compared at the same tier wherever both list one. The better value in each row is highlighted.
| Fact | AssemblyAI-TTS-1 | Eleven v4 Turbo |
|---|---|---|
| Price | ||
| Price per character | $0.000015 (better) | $0.00004 |
| Independent benchmarks | ||
| Artificial Analysis Speech Arena | 1221 Elo (#6 of 13) | 1331 Elo (#2 of 13) (better) |
| Specs | ||
| Provider | AssemblyAI | ElevenLabs |
| Release date | October 28, 2026 | September 28, 2026 |
| Access | API only | API only |
| Context window | Not reported | Not reported |
| Max output | Not reported | Not reported |
| Input | text | text |
| Output | audio | audio |
Charts
Against every current audio model
Where AssemblyAI-TTS-1 and Eleven v4 Turbo land among the current models of their task, on every independent benchmark, on price and on context.
Where each stands
On Artificial Analysis Speech Arena, AssemblyAI-TTS-1 ranks #6 and Eleven v4 Turbo #2 of 13 current models. Each bar is the share of current models it beats: on score, price and context.
Independent benchmarks
Artificial Analysis Speech Arena
AssemblyAI-TTS-1:#6of 13
1,221 Elo · ahead of 58%
Eleven v4 Turbo:#2of 13
1,331 Elo · ahead of 92%
Price and context
Price per character
AssemblyAI-TTS-1:#2of 11
$0.000015 · cheaper than 70%
Eleven v4 Turbo:#6of 11
$0.00004 · cheaper than 40%
Cost
What each costs
Example workloads at each provider's listed rates, then every other rate either one lists. The cheaper figure in each row is highlighted.
The same work, priced
For 1M characters, Eleven v4 Turbo costs 2.7 times as much as AssemblyAI-TTS-1, at each provider's listed rates.
1M characters
Eleven v4 Turbo costs 2.7× as much
- AssemblyAI-TTS-1
- $15
- Eleven v4 Turbo
- $40
| Workload or rate | AssemblyAI-TTS-1 | Eleven v4 Turbo |
|---|---|---|
| Example workloads | ||
| 1M characters | $15 (better) | $40 |
Your own bill will differ. These figures use list prices and example workloads. The AI Model Cost Audit reviews your real usage, shortlists models that score as well for each task for less, and estimates the savings.
Launch price $100, regular price $150
Verdict
When to choose each
AssemblyAI-TTS-1
Where it leads
- Lower price per character, $0.000015 vs $0.00004
Best for
- Voice agents on live phone calls
- High-volume speech where the cost per character matters
Watch out for
- Six languages at launch; AssemblyAI says more languages and accents will follow
- No fine-tuned (Pro) voice cloning, pronunciation dictionaries or emotion tags at launch
- The head-to-head figures in the launch post are AssemblyAI tests
Eleven v4 Turbo
Where it leads
- Higher Artificial Analysis Speech Arena score, 1331 Elo vs 1221 Elo
Best for
- Realtime voice agents
- Low-latency streaming speech
Watch out for
- ElevenLabs' latency figures exclude application and network latency
From benchmark to production
Building on AssemblyAI-TTS-1 or Eleven v4 Turbo?
Public scores rarely hold on your own data. We test both models on your real tasks, then build the agent or pipeline around the one that wins.
AI Model Cost AuditLaunch price $100, regular price $150What the audit includes
FAQ
AssemblyAI-TTS-1 vs Eleven v4 Turbo FAQ
Which is cheaper, AssemblyAI-TTS-1 or Eleven v4 Turbo?
AssemblyAI-TTS-1 is 63% cheaper per character than Eleven v4 Turbo, $0.000015 vs $0.00004.
How much would 1M characters cost with AssemblyAI-TTS-1 or Eleven v4 Turbo?
1M characters comes to $15 with AssemblyAI-TTS-1 and $40 with Eleven v4 Turbo at their listed rates.
Which scores higher on independent benchmarks, AssemblyAI-TTS-1 or Eleven v4 Turbo?
Eleven v4 Turbo leads on Artificial Analysis Speech Arena, 1331 Elo to 1221 Elo. Scores are independent evaluations, not either vendor's launch figures.
Further reading
More on AssemblyAI-TTS-1 and Eleven v4 Turbo
Related comparisons
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- Eleven Flash v2.5 vs Eleven v4 Turbo
- AssemblyAI-TTS-1 vs TTS-1
- Eleven Multilingual v2 vs Eleven v4 Turbo
- AssemblyAI-TTS-1 vs Voxtral Mini TTS 3
- Eleven v3 vs Eleven v4 Turbo
- AssemblyAI-TTS-1 vs MAI-Voice-2.1
- Eleven v4 Turbo vs Gemini 3.8 Flash-Lite TTS
- AssemblyAI-TTS-1 vs MAI-Voice-2.1-Flash
- Eleven v4 Turbo vs Gemini 3.8 Flash TTS
Production evaluation
Choosing between AssemblyAI-TTS-1 and Eleven v4 Turbo?
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