Gemini 3.8 Flash TTS takes the #1 spot on the Artificial Analysis Pronunciation Robustness Benchmark at 89.5%, surpassing Gemini 3.1 Flash TTS at 88.2% and SpaceXAI TTS at 87.6%

Our Pronunciation Robustness Benchmark evaluates how accurately Text to Speech models pronounce challenging text across different categories.

Key takeaways:

➤ Overall: Gemini 3.8 Flash TTS leads at 89.5%, followed by Gemini 3.1 Flash TTS at 88.2%, SpaceXAI TTS at 87.6%, and Gemini 3.8 Flash-Lite TTS at 87.4%.

➤ Contextually Appropriate: Gemini 3.8 Flash TTS leads at 97.9%.

➤ Expanding Shorthand: Gemini 3.8 Flash TTS leads at 86.1%.

➤ Preserving Exact Sequences: SpaceXAI TTS retains the top spot at 85.7%.

➤ Standalone Terms: Qwen-Audio-3.0-TTS-Plus leads at 95.5%, ahead of v3 Conversational at 95.1% and Gemini 3.1 Flash TTS at 93.7%.