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Model comparison
Eleven v4 vs Gemini 3.8 Flash TTS
Compare Eleven v4 and Gemini 3.8 Flash TTS using the same provider-sourced voice & realtime rubric. No mystery score and no invented benchmark ranking.
Quick take
Eleven v4
An expressive text-to-speech model for narration, character voices and dialogue in many languages.
Best for
- Audiobooks and narration
- Character dialogue
- Multilingual voiceovers
Watch out for
Test existing voices before switching. Cross-language accents can change, and SSML, Style and Speed controls are not supported. Voice cloning requires the speaker's consent.
Gemini 3.8 Flash TTS
Google's speech-generation model for expressive narration, character voices and dialogue in 130 languages.
Best for
- Audiobooks
- Character dialogue
- Multilingual narration
Watch out for
Put delivery instructions in speech_metadata, not the spoken script. Voice replication requires the speaker's consent; regional restrictions apply. Generated audio carries SynthID watermarking.
Compare the published facts
Eleven v4 vs Gemini 3.8 Flash TTS
Values use each provider's own published units and limits. A blank means the provider did not publish a directly comparable value in the sources reviewed.
| Voice & realtime | Eleven v4 | Gemini 3.8 Flash TTS |
|---|---|---|
| Price basisToken-, character-, or minute-based price for the listed access route. | $0.08 / 1,000 characters | $0.50 text input · $9 audio output / 1M tokens |
| Interaction modeSpeech-to-speech, audio-to-audio, or streamed text-to-speech behavior. | Text-to-speech and multi-speaker dialogue | Text-to-speech with two-speaker dialogue |
| Published latencyProvider-published measurement with its stated exclusions; not a Cody test. | Not published | Not published |
| LanguagesProvider-documented language coverage or a clear unpublished marker. | 90+ languages | 130 languages |
| Tools & controlNative function calling, reasoning, or speech-control features. | Audio tags, voice cloning and pronunciation dictionaries | Voice design and replication; no function calling |
| Context or input limitDocumented token or character limit where it is meaningful. | 10,000 characters per generation | 8,192 input · 16,384 output tokens |
How to choose
Compare the job, not the hype.
Start with the job you need to complete, then validate cost, access, and policy details on your exact provider route.
Eleven v4
ElevenLabs says enterprise customer data is not used for training by default. Other users can opt out of model improvement; enterprise zero-retention and regional environments are available with plan-specific limits.
Gemini 3.8 Flash TTS
Google says paid Gemini API prompts and responses are not used to improve its products. Unpaid-service content generally may be used, with different treatment for EEA, UK, and Swiss users; check the current terms for your account and region.
Provider and API links
Frequently asked questions
Eleven v4 vs Gemini 3.8 Flash TTS FAQ
What is the main difference between Eleven v4 and Gemini 3.8 Flash TTS?
Eleven v4: An expressive text-to-speech model for narration, character voices and dialogue in many languages. Gemini 3.8 Flash TTS: Google's speech-generation model for expressive narration, character voices and dialogue in 130 languages.
Should I choose Eleven v4 or Gemini 3.8 Flash TTS?
Consider Eleven v4 when your priority is Audiobooks and narration. Consider Gemini 3.8 Flash TTS when your priority is Audiobooks. Test both with your own data and provider route before committing.
Is this Eleven v4 vs Gemini 3.8 Flash TTS comparison based on Cody benchmarks?
No. This comparison aligns provider-published facts for the Voice & realtime category. It does not claim a universal winner or combine incompatible third-party benchmark scores.