AI Index

Gemini 3.5 Flash-LitevsGPT-6 Luna

Both language models, compared at each maker’s own API list prices. Every figure links to its source.

Compare at your usage

Every model priced for the same request
Prompt per request
Cache hits
Batch
Service tier

8,000 tokens in, 2,000 out

Gemini 3.5 Flash-Lite on Gemini APIGPT-6 Luna on OpenAI API
Rate appliedBase rateBase rate
Inputper 1M tokens$0.30 $0.10
Cache readper 1M tokens$0.030 $0.010
Outputper 1M tokens$2.50 $0.50
Cost per request$0.0074$0.0018
Per 1,000 requests$7.40$1.80

Every model is priced for the same request at its maker’s own list prices (each with its source and date), so bold marks the cheapest. A model that can’t serve the request is named, not ranked; a condition its seller doesn’t price says which rate was used.

Cost per request as prompts grow

2K tokens out, list price on each maker’s API. GPT-6 Luna charges $0.20 / $0.75 above 272K tokens.

0$0.10$0.20$0.300250K500K750K1Mprompt tokens per request272K8KGemini 3.5 Flash-Lite$0.0074 at 8KGPT-6 Luna$0.0018 at 8K
  • Gemini 3.5 Flash-Lite · Gemini API
  • GPT-6 Luna · OpenAI API

Where each stands among all scored models

Each line runs from the lowest to the highest score on the board; the tick is the median.

Epoch Capabilities Index#77 vs #32 of 118GPT-6 Luna: 156.7Gemini 3.5 Flash-Lite: 145.6LMArena Text#47 vs #63 of 163GPT-6 Luna: 1,441Gemini 3.5 Flash-Lite: 1,456LMArena Text · Coding#50 vs #46 of 163GPT-6 Luna: 1,506Gemini 3.5 Flash-Lite: 1,502LMArena Vision#33 vs #58 of 89GPT-6 Luna: 1,216Gemini 3.5 Flash-Lite: 1,269
  • Gemini 3.5 Flash-Lite
  • GPT-6 Luna

Key differences

Gemini 3.5 Flash-LiteGPT-6 Luna
OutputMaker’s official API · global · USD
$2.50 / 1M tokens Gemini API pricing · as of Nov 3, 2026
$0.50 / 1M tokens OpenAI API pricing · as of Nov 2, 2026
Context
1,048,576 Gemini 3.5 Flash Lite model · as of Nov 1, 2026
1,050,000 GPT-6 Luna · as of Nov 2, 2026
Max output
65,536 Gemini 3.5 Flash Lite model · as of Nov 1, 2026
128,000 GPT-6 Luna · as of Nov 2, 2026
Input modalities
Text, Image, Video, Audio, PDF Gemini 3.5 Flash Lite model · as of Nov 1, 2026
Text, Image GPT-6 Luna · as of Nov 2, 2026
Knowledge cutoff
Mar 2026 gemini 3 5 flash lite model card · as of Nov 1, 2026
May 2026 GPT-6 Luna · as of Nov 2, 2026
Cache readMaker’s official API · global · USD
$0.030 / 1M tokens Gemini API pricing · as of Nov 3, 2026
$0.010 / 1M tokens OpenAI API pricing · as of Nov 2, 2026

These differences use verified vendor specifications or each maker’s official API on the same region, currency, meter and billing conditions. Different conditions remain side by side in the full table; they do not establish which model is cheaper. Declared features describe support, not measured quality or a recommendation. Missing evidence does not mean a feature is unsupported.

Full comparison

Gemini 3.5 Flash-Lite Google GPT-6 Luna OpenAI
Overview
ReleasedJul 21, 2026 Sep 22, 2026
Open weights— —
Knowledge cutoffMar 2026 May 2026
Specs
Context1.05M 1.05M
Max input1M 922K
Max output65.54K 128K
Input modalitiesText, Image, Video, Audio, PDF Text, Image
Output modalitiesText Text
ReasoningYes Yes
Reasoning effortsminimal, low, medium, high none, low, medium, high, xhigh, max
Reasoning can be offNot stated Yes
Tool useYes Yes
Structured outputYes Yes
Built-in toolsWeb search, Web fetch, Code execution, Computer use, Maps Not stated
Pricing · per 1M tokens
Input price$0.30Also priced under other conditions: Image tokens, Video tokens, Audio tokens, Batch, Flex tier, Priority tier $0.10Also priced under other conditions: Batch, Flex tier, Fast tier, Prompts over 272K tokens
Output price$2.50Also priced under other conditions: Batch, Flex tier, Priority tier $0.50Also priced under other conditions: Batch, Flex tier, Fast tier, Prompts over 272K tokens
Cache read price$0.030Also priced under other conditions: Batch, Flex tier, Priority tier $0.010Also priced under other conditions: Batch, Flex tier, Fast tier, Prompts over 272K tokens
Cache write price— $0.125Also priced under other conditions: 30-minute cache, 12-hour cache, Prompts over 272K tokens, Batch, Flex tier, Fast tier
Blended price (3 input : 1 output)$0.85 $0.20
Pricing under conditions · per 1M tokens
Input price, long promptsNot offered $0.20Prompts over 272K tokens
Output price, long promptsNot offered $0.75Prompts over 272K tokens
Batch input price$0.15Batch $0.050Batch
Batch output price$1.25Batch $0.25Batch
Flex tier input price$0.15Flex tier $0.050Flex tier
Flex tier output price$1.25Flex tier $0.25Flex tier
Priority tier input price$0.54Priority tier Not offered
Priority tier output price$4.50Priority tier Not offered
Cited scores
Epoch Capabilities Index145.6 156.7
LMArena Text1,456 1,441 max effort
LMArena Text · Coding1,502 1,506 max effort
LMArena Vision1,269 1,216 max effort
LMArena Text · Chinese1,483 1,483 max effort
Epoch AI · GPQA Diamond83.3% high effort90.5% max effort
Epoch AI · FrontierMath Tiers 1–326% high effort78.9% max effort

Headline prices may come from different channels, regions or tiers. Check each source before choosing a model; missing facts stay blank.

Model details and sources

Cited scores