GPT-6 Luna vs o3 Pro

Price, context window & benchmark comparison

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GPT-6 Luna

OpenAI
$0.10 / $0.50
Input / Output · per 1M tokens
VS
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o3 Pro

OpenAI
$20.00 / $80.00
Input / Output · per 1M tokens
Compare different models
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Verdict: GPT-6 Luna is 175.0× cheaper than o3 Pro on a typical 3:1 input/output mix. GPT-6 Luna has the larger context window (1.1M vs 200K).
GPT-6 Lunao3 Pro
Input price / 1M$0.10$20.00
Output price / 1M$0.50$80.00
Blended price (3:1)$0.20$35.00
Cached input / 1M$0.01
Context window1.1M200K
Max output128K100K
Intelligence index37.3
Coding index
Providers7
Best provider uptime (30m)100.0%
Vision inputYesYes
ReasoningYesYes
Tool callingYesYes
Released2026-09-222025-06-10
Retirement

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FAQ

Which is cheaper, GPT-6 Luna or o3 Pro?

GPT-6 Luna is 175.0× cheaper than o3 Pro on a typical 3:1 input/output mix.

GPT-6 Luna vs o3 Pro: which has a bigger context window?

GPT-6 Luna: 1,050,000 tokens. o3 Pro: 200,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: GPT-6 Luna ≈ $450.00, o3 Pro ≈ $80,000.

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