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GPTvsGemini

GPT 5.6 Luna vs Gemini 2.5 Flash-Lite

Side-by-side comparison of pricing, task quality, and projected cost at higher scale.

Pricing

Side-by-side pricing

GPT 5.6 Luna

Fast / Budget

Gemini 2.5 Flash-Lite

Fast / Budget
Input $/MTok
$0.20
$0.10
Output $/MTok
$1.20
$0.40
Cache discount
90% off
90% off
Context
922K
1,048.576K

Quality

Task confidence comparison

Confidence score from zero to one hundred by task type, where higher is better.
Code Generation
70
vs
0
Code Review
68
vs
0
Summarization
84
vs
0
Q&A
85
vs
0
Extraction
89
vs
0
Reasoning
63
vs
0
Classification
91
vs
0
Creative Writing
58
vs
0
GPT 5.6 Luna
Gemini 2.5 Flash-Lite

Guidance

When to use GPT 5.6 Luna vs Gemini 2.5 Flash-Lite

Choose GPT 5.6 Luna when...

  • Similar performance; consider provider preference or ecosystem fit.

Choose Gemini 2.5 Flash-Lite when...

  • -Cost matters: 50% cheaper on input tokens
  • -You need a larger context window (1,048.576K vs 922K)

At scale

Cost at scale

Estimated cost assuming a seventy percent input and thirty percent output token split.
GPT 5.6 Luna
Gemini 2.5 Flash-Lite
100K tokens
$0.05
$0.02Cheaper
1M tokens
$0.82
$0.19Cheaper
10M tokens
$8.20
$1.90Cheaper

FAQ

When should I use GPT 5.6 Luna instead of Gemini 2.5 Flash-Lite?

GPT 5.6 Luna and Gemini 2.5 Flash-Lite perform similarly across all tracked tasks. Pick based on pricing and provider preference.

Is Gemini 2.5 Flash-Lite cheaper than GPT 5.6 Luna?

Yes. Gemini 2.5 Flash-Lite input costs $0.10/MTok vs $0.20/MTok for GPT 5.6 Luna, saving 50% on input.

What are the context window sizes for GPT 5.6 Luna and Gemini 2.5 Flash-Lite?

GPT 5.6 Luna has a 922K token context window. Gemini 2.5 Flash-Lite has a 1,048.576K token context window.

Go deeper on either model

Per-call cost calculators, provider lineups, and price history for both models on this page.

GPT 5.6 Luna pricing & benchmarks

$0.20 / $1.20 per MTok

GPT 5.6 Luna cost calculator

All GPT models

GPT 5.6 Luna pricing history

Gemini 2.5 Flash-Lite pricing & benchmarks

$0.10 / $0.40 per MTok

Gemini 2.5 Flash-Lite cost calculator

All Gemini models

Gemini 2.5 Flash-Lite pricing history

Other comparisons

How GPT 5.6 Luna and Gemini 2.5 Flash-Lite stack up against the rest of the field.

GPT 5.6 Luna vs Claude Opus 4.8

GPT 5.6 Luna vs Claude Sonnet 4.6

GPT 5.6 Luna vs Claude Haiku 4.5

Gemini 2.5 Flash-Lite vs Claude Opus 4.8

Gemini 2.5 Flash-Lite vs Claude Sonnet 4.6

Gemini 2.5 Flash-Lite vs Claude Haiku 4.5

Track your real costs

Comparisons show estimated costs at list price. The dashboard reveals your real spend and savings.

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