Gemini 3.1 Flash TTS Preview

Name: Gemini 3.1 Flash TTS Preview
Author: Google DeepMind

Released

2026-04-15

Last refreshed

2026-06-15

Status

Researched 90d ago

ProprietaryCommercial use: conditional

Gemini 3.1 Flash TTS Preview is worth evaluating for general LLM work when its provider route and context window match the workload.

Use it for

Teams evaluating general LLM work
Workloads that can use a 16k context window
Buyers comparing 1 tracked provider route

Do not use it for

Vision or document-understanding workloads
Strict JSON or tool-calling flows

Specifications

Family: Gemini 3.1
Released: 2026-04-15
Context: 16k
Architecture: Decoder Only
Specialization: audio
Openness: Proprietary
License: ProprietaryCommercial use: conditional
Weights: Not released
Code: Unknown
Training: Pretrained

Created by

Google DeepMind

Pioneering artificial intelligence research.

London, United Kingdom

Founded 2014

Website

Pricing

Output / 1M

Input / 1M

$1.00

Cheapest of 1 route · Google AI Studio

Providers(1)

Google AI Studio

View 1 provider route

Links

Website

About

Google's cost-efficient expressive text-to-speech model, released April 15, 2026. Supports 70+ languages, native multi-speaker dialogue, and 200+ audio style tags for precise delivery control. SynthID watermarking included. Achieves Elo 1,211 on the Artificial Analysis TTS leaderboard. Priced at $1.00/M input tokens and $20.00/M audio output tokens. API ID: gemini-3.1-flash-tts-preview.

Gemini 3.1 Flash TTS Preview is a proprietary model in the Gemini 3.1 family. The structured metadata tracks a 16k-token context window and audio. This page tracks provider routes through Google AI Studio. Headline tracked benchmarks include Artificial Analysis TTS Arena ELO 1229.0.

Top use-case fit

No primary decision-task fit is mapped for this model yet.

Provider price ladder

Compare API pricing across 1 providers for input and output tokens, batch, and cached reads when available.

Provider	Input / 1M	Output / 1M	Route
Google AI Studio	$1.00	-	ServerlessPartial

Available via routers & gateways(13)

LiteLLM

Gateway

Open-source Python SDK and proxy server that unifies 100+ LLM APIs behind a single OpenAI-compatible interface, with load balancing, cost tracking, and configurable failover.

Free OSSGoogle AI Studio

OpenRouter

Hybrid

Unified hybrid gateway to 400+ models from 60+ providers via a single OpenAI-compatible API, with optional auto-routing that selects the best model per prompt.

PassthroughGoogle AI Studio

Portkey

Gateway

Production AI gateway routing to 1,600+ LLMs with failover, load balancing, semantic caching, and guardrails; Apache 2.0 core is fully self-hostable with the complete feature set.

SubscriptionGoogle AI Studio

AIRouter

Router

Commercial LLM router that analyzes incoming requests and routes to the optimal model for cost/quality/latency via a drop-in OpenAI-compatible API, with a privacy-preserving embedding mode that avoids sending prompt content.

Passthrough + feeGoogle AI Studio

Helicone

Gateway

Observability-first AI gateway with routing, caching, rate limiting, and request tracing; Apache 2.0 open-source core with a managed hosted tier for logging and analytics.

SubscriptionGoogle AI Studio

Kong AI Gateway

Gateway

Multi-LLM AI gateway built on Kong Gateway 3.x, adding semantic routing, load balancing, guardrails, and MCP traffic analytics as plugins over Kong's existing API management platform.

SubscriptionGoogle AI Studio

Capabilities

Audio

Benchmark peer barsfor Coding

No task-mapped benchmark peers are available for this model yet.

Benchmark scores(1)

Scores are benchmark-specific and are direction-aware: the same numeric gap can mean very different outcomes across suites. Use the leaderboard context and this model's provider route to decide whether the winning margin is meaningful for your workload.