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VERIFIED PRICEPREVIEW MODEL1MTEXT + VISIONPROMPT CACHING

Gemini 3.1 Flash-Lite Preview API Pricing

Gemini 3.1 Flash-Lite Preview is Google's preview budget tier at the same rate as GA Flash-Lite. $0.25/M input, $1.5/M output, and $0.025/M cached input. Use it for preview-surface comparisons, not as the default stable production pick.

Input - per 1M tokens
$0.25/M
Source Google preview
Output - per 1M tokens
$1.50/M
Use for cost checks preview
Cached input
$0.03/M
Cache hit price discounted
Effective - agentic blend
$0.18/M
92/8 split - 82% cache
§ 01 / TERMINAL

Run the numbers.

Calculator pre-loaded with Gemini 3.1 Flash-Lite Preview rates. Tweak spend, output mix, or cache hit rate to compare this model with current alternatives.

$ /mo
Workload split
Prompt cache hit rate
Tokens you can process
—
Words equivalent (English)
—
Effective rate
—
§ 02 / SCENARIOS

Real-world presets.

AGENT LOOP

Repo-wide bug fix

$0.016/task
81k in - 7k out~6,250 units/$100
LONG DOC

Reading 100-page contracts

$0.023/doc
175k in - 8k out~4,347 units/$100
RAG SUPPORT

Support agent ticket triage

$0.002/ticket
4k in - 1k out~50,000 units/$100
ASSISTANT TURN

Research planning turn

$0.004/turn
12k in - 2k out~25,000 units/$100
§ 03 / TAPE

Price history.

Gemini 3.1 Flash-Lite Preview is preview; archived at $0.25/$1.5 per M.

Input · $0.25/M
Output · $1.5/M
Cached · $0.03/M
MAY 18 Preview listed at $0.25/M input, $0.025/M cached input, and $1.50/M outputMAY 18 Preview pricing verified on Google AI pricing
§ 04 / TOKENIZER

Paste text. See tokens. See cost.

Estimate · gemini-tokenizer-estimate · ≈4.2 chars/token Auto-counts as you type

This is a chars-per-token approximation, not a real tokenizer. Actual tokens vary by language, code density, and tool-call overhead — counts are typically ±10–20% off for English prose, more for code or non-Latin scripts. For exact billing, use the vendor's official tokenizer.

Characters —
Words —
Tokens (estimated) —
Cost as input · uncached —
Cost as output · uncached —
Cost as cached input —
§ 05 / SHELF

Up against the shelf.

All models →
Model Input /M Output /M Effective blended Context Best for
Gemini 3.1 Flash-Lite Preview $0.25 cache $0.03 $1.50 $0.18 current page 1M Gemini multimodal workloads
Gemini 2.5 Pro $1.25 cache $0.13 $10.00 $1.10 pricier 2M Gemini multimodal workloads
Gemini 2.5 Flash $0.30 cache $0.03 $2.50 $0.27 pricier 1M Gemini multimodal workloads
Gemini 2.5 Flash-Lite $0.10 cache $0.01 $0.40 $0.06 cheaper 1M Gemini multimodal workloads
GPT-5.4 $2.50 cache $0.25 $15.00 $1.80 pricier 1.05M Current OpenAI replacement
Claude Sonnet 4.6 $3.00 cache $0.30 $15.00 $1.92 pricier 1M Current Claude agents
DeepSeek V4 Pro $0.43 cache $0.00 $0.87 $0.14 cheaper 1M Low-cost reasoning and coding

Frequently asked.

Short answers for teams checking Gemini 3.1 Flash-Lite Preview pricing, status, and migration choices.

Q · 01 Is Gemini 3.1 Flash-Lite Preview still available? +
Gemini 3.1 Flash-Lite Preview is a preview model. Use it when you intentionally need this preview surface; compare stable rows before production routing.
Q · 02 How much does Gemini 3.1 Flash-Lite Preview cost? +
Gemini 3.1 Flash-Lite Preview is listed at $0.25/M input and $1.5/M output.
Q · 03 Is cached-input pricing included? +
Yes. Cached input is shown at $0.025/M.
Q · 04 What should teams compare it against? +
Use the shelf to compare current replacements and nearby models. Snapshot replacement: current same-provider models.
Q · 05 Why keep this page? +
These pages preserve price history, preview economics, and migration context without pretending every older or preview model is the best current default.
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Reviewed by Yaroslav Vikhariev Founder - AI//COST - Last verified 2026-05-18 - Vendor pricing
Methodology Report a correction More by Y.V.