Gemini 2.5 Flash Lite vs GPT-6 Luna Pro

Price, context window & benchmark comparison

Gemini 2.5 Flash Lite

Google

$0.10 / $0.40

Input / Output · per 1M tokens

GPT-6 Luna Pro

OpenAI

$0.10 / $0.50

Input / Output · per 1M tokens

Compare different models

Verdict: Gemini 2.5 Flash Lite is 13% cheaper than GPT-6 Luna Pro on a typical 3:1 input/output mix. GPT-6 Luna Pro has the larger context window (1.1M vs 1M).

	Gemini 2.5 Flash Lite	GPT-6 Luna Pro
Input price / 1M	$0.10	$0.10
Output price / 1M	$0.40	$0.50
Blended price (3:1)	$0.18	$0.20
Cached input / 1M	$0.01	$0.01
Context window	1M	1.1M
Max output	66K	128K
Intelligence index	—	—
Coding index	—	—
Providers	—	6
Best provider uptime (30m)	—	100.0%
Vision input	Yes	Yes
Reasoning	Yes	Yes
Tool calling	Yes	Yes
Released	2025-07-22	2026-09-22
Retirement	2026-10-20	—

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, Gemini 2.5 Flash Lite or GPT-6 Luna Pro?

Gemini 2.5 Flash Lite is 13% cheaper than GPT-6 Luna Pro on a typical 3:1 input/output mix.

Gemini 2.5 Flash Lite vs GPT-6 Luna Pro: which has a bigger context window?

Gemini 2.5 Flash Lite: 1,048,576 tokens. GPT-6 Luna Pro: 1,050,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: Gemini 2.5 Flash Lite ≈ $400.00, GPT-6 Luna Pro ≈ $450.00.

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