Last verified
RETIRED MAY 25 20261MTEXT + VISIONPROMPT CACHING

Gemini 3.1 Flash-Lite Preview API Pricing

Gemini 3.1 Flash-Lite Preview was retired by Google on May 25, 2026 - the gemini-3.1-flash-lite-preview model id no longer answers. Google names Gemini 3.1 Flash-Lite as the replacement. Its last listed rates were $0.25/M input and $1.50/M output, with cache hits at $0.025/M, kept here for invoice checks and migration math. Checked against Google's Gemini deprecations table.

Input - per 1M tokens
$0.25/M
Source Google preview
Output - per 1M tokens
$1.50/M
Use for cost checks preview
Cached input
$0.025/M
Cache hit price discounted
Effective - agentic blend
$0.18/M
92/8 split - 82% cache
§ 01 / TERMINAL

Gemini 3.1 Flash-Lite Preview API cost calculator.

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
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Words equivalent (English)
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Effective rate
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Open full calculator (all models · share URL · CSV) →
§ 02 / SCENARIOS

Gemini 3.1 Flash-Lite Preview cost on real workloads.

AGENT LOOP

Repo-wide bug fix

$0.016/task
81k in - 7k out~6,326 units/$100
LONG DOC

Reading 100-page contracts

$0.023/doc
175k in - 8k out~4,262 units/$100
RAG SUPPORT

Support agent ticket triage

$0.00176/ticket
4k in - 1k out~56,753 units/$100
ASSISTANT TURN

Research planning turn

$0.00379/turn
12k in - 2k out~26,413 units/$100
§ 03 / TOKENIZER

Gemini 3.1 Flash-Lite Preview token counter and cost.

What's a token →
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 278
Words 41
Tokens (estimated) 66 tokens
Cost as input · uncached $0.00002 USD
Cost as output · uncached $0.0001 USD
Cost as cached input $0.000002 USD
§ 04 / SHELF

Gemini 3.1 Flash-Lite Preview vs similar models.

All models →
Model Input /M Output /M Effective blended Context Best for
Gemini 3.1 Flash-Lite Preview Current $0.25 cache $0.025 $1.50 $0.18 agentic 92/8 1M Gemini multimodal workloads
Gemini 3.8 Flash $0.75 cache $0.075 $3.75 $0.481 +2.7× · promo 1M Gemini multimodal workloads
Gemini 3.5 Flash-Lite $0.30 cache $0.03 $2.50 $0.272 +51% 1M Gemini multimodal workloads
GPT-6.1 Sol $2.00 cache $0.10 $10.00 $1.29 +7.2× 1.05M OpenAI's balanced model for coding and agents
Claude Sonnet 5.5 $2.00 cache $0.10 $10.00 $1.29 +7.2× 1M Anthropic's current Sonnet
DeepSeek V4 Pro $1.32 cache $0.044 $3.96 $0.569 +3.2× 1M Low-cost reasoning and coding
§ 05 / DEEP LINKS

Gemini 3.1 Flash-Lite Preview cost by scenario.

All calculators →

By comparison

Compare current OpenAI → Compare current Gemini → Compare current Claude →

Gemini 3.1 Flash-Lite Preview API pricing FAQ.

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

Q · 01 Can I still call Gemini 3.1 Flash-Lite Preview? +
No. Google retired gemini-3.1-flash-lite-preview on May 25, 2026, and requests to it now fail. Google names Gemini 3.1 Flash-Lite as the replacement. The rates on this page are the last ones Google listed, kept for reading old invoices and for estimating a migration.
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.
Y
Reviewed by Yaroslav Vikhariev Founder · AI//COST · Prices checked by hand against ai.google.dev · Last verified Sep 24, 2026
Methodology Report a correction More by Y.V.