Gemini 3.8 Flash-Lite TTS debuts at #1 in Japanese on the Artificial Analysis Controlled Voice Arena, with Gemini 3.8 Flash TTS taking the #2 spot

Our Controlled Voice Arena standardizes speaker identity across models using the same replicated reference voices, allowing us to isolate speech quality from voice preference. We evaluate models across English and 9 additional languages.

Key takeaways:

➤ Japanese: Gemini 3.8 Flash-Lite TTS takes #1 with an Elo of 1,212, followed by Gemini 3.8 Flash TTS at #2, giving Google the top two positions.

➤ Arabic and German: Gemini 3.8 Flash-Lite TTS ranks #2 in Arabic with an Elo of 1,274 and #3 in German at 1,250.

➤ Portuguese: Gemini 3.8 Flash TTS takes #2 with an Elo of 1,295.

➤ Other languages: Both models rank in the top 8 in Hindi, Spanish and French.

➤ Gemini 3.8 Flash-Lite TTS and Gemini 3.8 Flash TTS score 1,057 and 1,051 Elo, respectively, trailing Realtime TTS-2 at 1,144.