# Artificial Analysis finds the largest TTS gaps between US and UK English accents

> Original title: The largest performance differences between US and UK English:

- Source: Artificial Analysis
- Published: 2026-11-07T01:01:11.000Z
- Bad Influence: https://badinfluence.news/items/pevjjo3ro4kp5k8vofmdo2dk5
- Original: https://x.com/ArtificialAnlys/status/2118871350215618962

## Summary

Artificial Analysis reports that Lightning V3.1 Pro scores 94 Elo points higher in US English than in UK English, the largest gap among the models it lists. Qwen-Audio-3.1-TTS-Plus scores 66 points higher in US English, while Soniox TTS Real-Time v2 and Speech 2.8 Turbo score 51 and 49 points higher in UK English. The firm says TTS models should be evaluated in the accent relevant to the use case rather than judged by overall rankings alone.

## Post

The largest performance differences between US and UK English:

➤ Lightning V3.1 Pro: 94 Elo points higher in US English

➤ Qwen-Audio-3.1-TTS-Plus: 66 points higher in US English

➤ Soniox TTS Real-Time v2: 51 points higher in UK English

➤ Speech 2.8 Turbo: 49 points higher in UK English

These differences highlight the importance of evaluating TTS models in the accent relevant to your use case, rather than relying on overall rankings alone.

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