How much does Gemini 3.1 Flash Lite Preview cost per million tokens?

Gemini 3.1 Flash Lite Preview costs $0.25 per million input tokens and $1.50 per million output tokens at list price, and $0.025 per million cached input tokens.

What is the context window of Gemini 3.1 Flash Lite Preview?

Gemini 3.1 Flash Lite Preview accepts up to 1,048,576 tokens of context and returns up to 65,536 output tokens.

How much do 1,000 chat messages cost with Gemini 3.1 Flash Lite Preview?

About $1.00, assuming 1,000 input + 500 output tokens per message.

Is there a cheaper alternative to Gemini 3.1 Flash Lite Preview?

In the same price range, OpenAI GPT-6 Luna Pro ($0.1 / $0.5), OpenAI GPT-6 Luna ($0.1 / $0.5), Qwen Qwen3.8 Omni Flash ($0.15 / $0.47) cost less per token. Quality differs: test on your own prompts.

Where can I buy Google API credits for less?

Discount credit books resell OpenRouter usage below face value within their depth, OpenRouter adds a 5.5% card fee, and Google sells its own credits at face value. The live table on this page ranks them for $100 of usage.

Google · live price

Gemini 3.1 Flash Lite Preview API pricing

Gemini 3.1 Flash Lite Preview is Google's high-efficiency model optimized for high-volume use cases. It outperforms Gemini 2.5 Flash Lite on overall quality and approaches Gemini 2.5 Flash performance across...

Small and cheap (under $1 per 1M)Tool callingReasoningimage inputvideo inputfile inputaudio input

Input: $0.25; per 1M tokens
Output: $1.50; per 1M tokens
Cached input: $0.025; per 1M tokens
Context: 1.0M; 66K max output

List price from OpenRouter, which passes Google's price through without markup. Refreshed hourly. Released March 3, 2026. Model id google/gemini-3.1-flash-lite-preview.

What Gemini 3.1 Flash Lite Preview costs in practice

At list price, before any batch or caching discount.

1,000 chat messages

$1.00

1,000 input + 500 output tokens each

1,000 RAG questions

$2.75

8,000 input + 500 output tokens each

100 coding-agent steps

$1.05

30,000 input + 2,000 output tokens each, no caching

Gemini 3.1 Flash Lite Preview price history

No price change since we started tracking on 2026-10-01. We record prices daily; changes will show here.

Gemini 3.1 Flash Lite Preview price by host

One host serves this model through OpenRouter.

Google AI Studio$0.125 in · $0.75 out · 1.0M ctx · 100.0% uptime 24h

Where to buy Google credits for less

Gemini 3.1 Flash Lite Preview costs the same per token everywhere it's sold through OpenRouter. What changes is the price of the credits. Live quotes for $100 of usage:

#	Where you buy	You payYou pay for $100.00 of usage	vs list price	Price source
1	OrbioCardCheapest right now Credits from a discount book, plus a 5% platform fee and card processing, both included in the quote.	$85.10 incl. $2.60 card processing	-14.9%	live quote
2	smaaartCard Credits from a discount book, plus a 5% platform fee on face value. Card processing and taxes shown at checkout.	$95.00 + card processing and tax at checkout (not in this number)	-5.0%	live quote
3	Direct from the labCard Prepaid credits at face value (OpenAI, Anthropic, Google…). Taxes may apply.	$100.00 no top-up fee	list price	face value
4	OpenRouterCrypto 5% on crypto purchases. No markup on model prices.	$105.00 fees included	+5.0%	published fee
5	OpenRouterCard 5.5% on card purchases, $0.80 minimum. No markup on model prices.	$105.50 fees included	+5.5%	published fee

Disclosure: this site is run by the team behind smaaart, one of the options compared. Tables are ranked by price only, from live quotes and published fees, including when smaaart isn't first. How we compare

Gemini 3.1 Flash Lite Preview cost calculator

Enter your monthly tokens to price your own usage.

Model$0.25 in / $1.50 out per 1M tokens · list price, liveInput tokens / month (millions)Output tokens / month (millions)

Usage at list price$27.50/ month(quotes below are for $28.00: purchases run from $5.00 to $10,000.00)

Cheaper alternatives to Gemini 3.1 Flash Lite Preview

Other labs' models in the same price range or the one below, cheaper per token.

Model	Input / 1M	Output / 1M	Blended 3:1	Context
OpenAI: GPT-6 Luna Pro	$0.1	$0.5	$0.2	1.1M
OpenAI: GPT-6 Luna	$0.1	$0.5	$0.2	1.1M
Qwen: Qwen3.8 Omni Flash	$0.15	$0.47	$0.23	1M
DeepSeek: DeepSeek V4.1 Flash	$0.03	$0.5	$0.147	1.0M
Qwen: Qwen3.8 Flash	$0.15	$0.47	$0.23	1M
Z.ai: GLM 5.3 Flash	$0.15	$0.5	$0.237	1.0M

Other Google models

Model	Input / 1M	Output / 1M	Blended 3:1	Context
Nano Banana 2 (Gemini 3.1 Flash Image Preview)	$0.5	$3	$1.13	66K
Gemini 3.1 Pro Preview Custom Tools	$2	$12	$4.50	1.0M
Gemini 3.1 Pro Preview	$2	$12	$4.50	1.0M
Gemma 4 31B	$0.09	$0.34	$0.152	262K
Gemma 4 26B A4B	$0.09	$0.3	$0.143	262K
Gemini 3.1 Flash Lite	$0.25	$1.50	$0.563	1.0M

All Google API prices