GPT-5 Nano vs GPT-6 Luna

Price, context window & benchmark comparison

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GPT-5 Nano

OpenAI
$0.05 / $0.40
Input / Output · per 1M tokens
VS
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GPT-6 Luna

OpenAI
$0.10 / $0.50
Input / Output · per 1M tokens
Compare different models
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Verdict: GPT-5 Nano is 31% cheaper than GPT-6 Luna on a typical 3:1 input/output mix. GPT-6 Luna has the larger context window (1.1M vs 400K).
GPT-5 NanoGPT-6 Luna
Input price / 1M$0.05$0.10
Output price / 1M$0.40$0.50
Blended price (3:1)$0.14$0.20
Cached input / 1M$0.005$0.01
Context window400K1.1M
Max output128K128K
Intelligence index37.3
Coding index
Providers7
Best provider uptime (30m)100.0%
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2025-08-072026-09-22
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FAQ

Which is cheaper, GPT-5 Nano or GPT-6 Luna?

GPT-5 Nano is 31% cheaper than GPT-6 Luna on a typical 3:1 input/output mix.

GPT-5 Nano vs GPT-6 Luna: which has a bigger context window?

GPT-5 Nano: 400,000 tokens. GPT-6 Luna: 1,050,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: GPT-5 Nano ≈ $300.00, GPT-6 Luna ≈ $450.00.

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