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Favicon for google

Google: Gemini 3.8 Flash Lite TTS

google/gemini-3.8-flash-lite-tts

BenchmarksCompare

Gemini 3.8 Flash Lite TTS is a text-to-speech model from Google and the fast, high-throughput member of the 3.8 TTS family alongside Gemini 3.8 Flash TTSOpens in new tab. It is suited for conversational voice-agent pipelines, high-volume read-aloud, and voice replication workloads where latency and cost matter more than maximum expressiveness.

It accepts the same speech configuration as Gemini 3.1 Flash TTS PreviewOpens in new tab, including the 30 prebuilt studio voices, and supports Google's Voice Design and Voice Replication through voice_... identifiers.

Modalities
In / Out Price
$0.50 / $6per 1M
Context
33K
Released
Sep 23, 2026
BenchmarksCompare
PlaygroundBenchmarksProvidersPerformanceUptimeAppsActivityDocumentationFAQExplore

Playground

Benchmarks

Scores on standardized evaluations and this model’s own outputs on shared benchmark prompts. Higher percentages are better — and each rank shows where this model lands among the models evaluated on that source.

Providers

Different companies host the same model. OpenRouter routes your request to one of them based on the routing mode you pick — Balanced (price + speed), Nitro (fastest), or Floor (cheapest).

Performance

Throughput is how fast the model writes (tokens per second — higher is better). Latency is total round-trip time (lower is better). TTFT is time-to-first-token — how long before you see anything appear (lower is better).

Uptime

Uptime is the percentage of the past 3 days that at least one provider was responding to requests. Availability is the percentage of time that inference was successfully served. OpenRouter continuously monitors and uses the next-best provider when one returns an error.

Apps

Public apps that send the most traffic to this model. Good signal for what real production workloads look like — and a hint at which use cases this model is best suited for.

Activity

Token volume and request traffic to this model over time.

API

Drop-in code to call this model. OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. The only thing that changes between models is the model slug below.

Not currently available through EU in-region routing. In-region routing docs

Documentation

Guides, cookbooks, blog posts, and tools for building with Google: Gemini 3.8 Flash Lite TTS on OpenRouter.

  • Two-Voice PodcastCookbook

Explore more models

Best Text-to-Speech ModelsCollectionSpeech Model RankingsRanking
Latency
$0.50$6.001.87s
99.97%
$0.50$6.001.40s
100.00%
Latency
1.40s

P50, best provider

Uptime (3d)The model was reachable. Request routed to a provider.
100.00%
Availability (3d)The model returned inference from any provider. Errors and empty responses count against it.
99.88%

Availability over the last 3 days

Last 72 hours
Availability 99.88%
3 Days Ago2 Days AgoYesterdayNow

Availability over the last 24 hours

OpenRouter Availability
99.96%
Without Routing
99.92%

When an error occurs in an upstream provider, we can recover by routing to another healthy provider, if your request filters allow it. You can access per-provider uptime data programmatically through the Endpoints API. Learn more about our load balancing and provider routing options.

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Medly Delphi
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32.3Mtokens
2.
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5.43Mtokens
3.
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Brisvegas Streets
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5.27Mtokens
4.
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DHQ News Video
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4.28Mtokens
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Kompass
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3.76Mtokens

Frequently asked questions

Gemini 3.8 Flash Lite TTS is a text-to-speech model from Google and the fast, high-throughput member of the 3.8 TTS family alongside Gemini 3.8 Flash TTS. It is suited for conversational voice-agent pipelines, high-volume read-aloud, and voice replication workloads where latency and cost matter more than maximum expressiveness.

The Gemini 3.8 Flash Lite TTS documentation on OpenRouter includes the Two-Voice Podcast cookbook. The quickstart covers API keys and your first request, and the API reference lists every parameter.

Gemini 3.8 Flash Lite TTS costs $0.50/M text tokens for Input and $6.00/M audio tokens for Output.

Gemini 3.8 Flash Lite TTS ships 30 voices. Pass a voice ID in the voice field of a text-to-speech request; the IDs this endpoint accepts are listed with the model in the models API.

Gemini 3.8 Flash Lite TTS accepts text as input and returns generated speech audio.

Gemini 3.8 Flash Lite TTS is served by 2 providers on OpenRouter: Google AI Studio and Google Vertex. Requests are routed to the best available provider, with automatic failover to the others, and you can pin or exclude providers with provider routing.

Gemini 3.8 Flash Lite TTS was released on September 23, 2026.