Gemini 3.5 Flash Lite vs GPT-6 Luna

Price, context window & benchmark comparison

Gemini 3.5 Flash Lite

Google

$0.30 / $2.50

Input / Output · per 1M tokens

GPT-6 Luna

OpenAI

$0.10 / $0.50

Input / Output · per 1M tokens

Compare different models

Verdict: GPT-6 Luna is 4.3× cheaper than Gemini 3.5 Flash Lite on a typical 3:1 input/output mix. GPT-6 Luna scores higher on the Artificial Analysis Intelligence Index (27.9 vs 11.7). GPT-6 Luna has the larger context window (1.1M vs 1M).

	Gemini 3.5 Flash Lite	GPT-6 Luna
Input price / 1M	$0.30	$0.10
Output price / 1M	$2.50	$0.50
Blended price (3:1)	$0.85	$0.20
Cached input / 1M	$0.03	$0.01
Context window	1M	1.1M
Max output	66K	128K
Intelligence index	11.7	27.9
Coding index	49.3	—
Providers	8	8
Best provider uptime (30m)	100.0%	100.0%
Vision input	Yes	Yes
Reasoning	Yes	Yes
Tool calling	Yes	Yes
Released	2026-07-21	2026-09-22
Retirement	—	—

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, Gemini 3.5 Flash Lite or GPT-6 Luna?

GPT-6 Luna is 4.3× cheaper than Gemini 3.5 Flash Lite on a typical 3:1 input/output mix.

Gemini 3.5 Flash Lite vs GPT-6 Luna: which has a bigger context window?

Gemini 3.5 Flash Lite: 1,048,576 tokens. GPT-6 Luna: 1,050,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Gemini 3.5 Flash Lite ≈ $1,850, GPT-6 Luna ≈ $450.00.

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