Gemini/Fast / Budget

Gemini 3.5 Flash

Gemini 3.5 Flash is Gemini's fastest and most affordable model, priced at $1.50/MTok input and $9.00/MTok output with a 1,000K context window.

Input $/MTok

$1.50

Output $/MTok

$9.00

Context window

1,000K

Cache read discount

90% off

Gemini 3.5 Flash pricing breakdown

RateInput $/MTokOutput $/MTok
Standard$1.50$9.00
Cached read (90% off input)$0.15-
Cached write (no surcharge)$1.50-
Batch (50% off)$0.75$4.50

All rates in USD per million tokens. Prices verified against provider documentation.

Gemini 3.5 Flash task benchmarks

Confidence scores (0-100) and cross-provider rank for each task type. Rank 1 is best across all 20 models.

TaskConfidenceRank
Code Generation68/100#7
Code Review65/100#6
Summarization85/100#3
Q&A84/100#5
Extraction90/100#1
Reasoning60/100#6
Classification92/100#1
Creative Writing55/100#6

Gemini 3.5 Flash cost by use case

Estimated cost per API call using default token counts for each workload.

Use caseInput tokensOutput tokensCost / call
Code Generation2,0004,000$0.0390
Unit Test Generation3,0005,000$0.0495
SQL Generation1,5001,000$0.0113
API Generation3,0006,000$0.0585
Code Refactoring4,0004,000$0.0420
Code Review5,0002,000$0.0255
PR Review8,0003,000$0.0390
Security Review6,0002,500$0.0315
Bug Detection5,0002,000$0.0255
Document Summarization10,0001,000$0.0240
PDF Summarization15,0001,500$0.0360
Meeting Notes8,0002,000$0.0300

Monthly cost projections

Projected monthly spend at different call volumes, using code generation as a representative workload (2,000 input / 4,000 output tokens per call).

Calls / monthWithout cachingWith caching (90% read discount)
1K$39$37.11
10K$390$371.1
100K$3,900$3,711
500K$19,500$18,555
1M$39,000$37,110

Caching estimate assumes 70% of input tokens are cache reads. Your actual cache hit rate will depend on prompt structure and reuse.

Fast / Budget alternatives to Gemini 3.5 Flash

Same-tier models from other providers, sorted by input price.

ModelProviderInput $/MTokOutput $/MTokInput savings
GPT 5.6 LunaGPT$0.20$1.2087% cheaper
Claude Haiku 4.5Claude$1.00$5.0033% cheaper
Grok Build 0.1Grok$1.00$2.0033% cheaper

Gemini 3.5 Flash pricing history

Input increased

$0.15 to $1.50/MTok

Jul 15, 2026

Output increased

$0.60 to $9.00/MTok

Jul 15, 2026

Output decreased

$0.75 to $0.60/MTok

Jun 10, 2026

View full Gemini 3.5 Flash pricing history

Track your Gemini 3.5 Flash spend

See exactly how much you spend on Gemini 3.5 Flash and where you can save. Two-line wrapper install, no API keys shared.