Gemini 3.8 Flash TTS ranks first in pronunciation robustness benchmark with 89.5% score

Google’s newest text-to-speech model just topped the most widely cited pronunciation accuracy test in the AI audio space. Gemini 3.8 Flash TTS scored 89.5% on the Artificial Analysis Pronunciation Robustness Benchmark, claiming the number one spot. What the numbers actually mean Gemini 3.8 Flash TTS’s 89.5% score represents a meaningful improvement over its predecessor, Gemini 3.1 Flash TTS, which managed 88.2%. The pronunciation benchmark isn’t the only leaderboard where Google’s new model is collecting trophies. Gemini 3.8 Flash TTS also secured the top position on the Hume AI Voice Design Benchmark with an overall score of 71.4. It scored 60.8 specifically for accent reproduction. And for good measure, it grabbed both the first and second spots on the Hume AI Overall Quality Index. Under the hood Google launched Gemini 3.8 Flash TTS on September 23, alongside a lighter variant called Flash-Lite TTS. Both are accessible through the Gemini API and Google AI Studio under the model identifiers gemini-3.8-flash-tts and gemini-3.8-flash-lite-tts. The base Gemini 3.8 Flash model shipped earlier in September. The TTS-specific upgrades followed roughly three weeks later. The model suppor...