AI Model Watch
Deprecations / Migrate

Migrate off Gemini 3.1 Flash TTS

Deprecated

Gemini 3.1 Flash TTS is deprecated and shuts down on 17 Nov 2026. Google's official replacement is Gemini 3.8 Flash TTS. The cheapest comparable model we track is Llama 3.1 8B Instruct (Meta) at $0.022 per 1M tokens blended.

Last verified: 24 Oct 2026 · sourced from official provider documentation

StatusDeprecatedGoogle
Shutdown date17 Nov 2026plan ahead
Official replacementGemini 3.8 Flash TTS$2.63 /M blendedCheapest alternativeLlama 3.1 8B Instruct$0.022 /M blended
What changes

Gemini 3.1 Flash TTS → Gemini 3.8 Flash TTS

Moving to Gemini 3.8 Flash TTS means 2.2× cheaper ($5.75 → $2.63 /1M blended).

SpecGemini 3.1 Flash TTSGemini 3.8 Flash TTS
StatusDeprecatedGA
Blended price /1M$5.75$2.63
Input / output /1M$1 / $20$0.5 / $9
Context window—8K
Max output—16.384
Modalitytext, audio-outtext, audio-out
Knowledge cutoff——

API string was gemini-3.1-flash-tts-preview → switch to gemini-3.8-flash-tts. See Gemini 3.8 Flash TTS's full spec sheet →

Cheapest alternatives

Budget-friendly replacements for Gemini 3.1 Flash TTS

Generally-available models that match Gemini 3.1 Flash TTS's capabilities, ranked by blended price. Every number is computed from official catalog prices.

ModelBlended /1MInput / outputContext
Llama 3.1 8B Instruct
Meta
$0.022$0.02 / $0.03128K
Amazon Nova Micro
Amazon
$0.061$0.035 / $0.14128K
Command R7B
Cohere
$0.066$0.037 / $0.15128K
FAQ

Migrating off Gemini 3.1 Flash TTS

What replaces Gemini 3.1 Flash TTS?

Google's recommended migration for Gemini 3.1 Flash TTS is Gemini 3.8 Flash TTS. The cheapest comparable model in our catalog is Llama 3.1 8B Instruct (Meta) at $0.022/1M blended.

When is Gemini 3.1 Flash TTS shut down?

Gemini 3.1 Flash TTS is deprecated and scheduled to shut down on 17 Nov 2026. Migrate before that date to avoid a 404.

What is the cheapest alternative to Gemini 3.1 Flash TTS?

Llama 3.1 8B Instruct (Meta) is the cheapest generally-available alternative we track that matches Gemini 3.1 Flash TTS's capabilities, at $0.02 per 1M input and $0.03 per 1M output tokens ($0.022/1M blended).

Browse the full deprecation watch → or see Gemini 3.1 Flash TTS's full spec sheet →