GPT-6 Luna vs gpt-oss-120b

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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gpt-oss-120b

OpenAI
$0.15 / $0.60
Input / Output · per 1M tokens
Compare different models
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Verdict: GPT-6 Luna is 24% cheaper than gpt-oss-120b on a typical 3:1 input/output mix. GPT-6 Luna scores higher on the Artificial Analysis Intelligence Index (37.3 vs 11.6). GPT-6 Luna has the larger context window (1.1M vs 131K).
GPT-6 Lunagpt-oss-120b
Input price / 1M$0.10$0.15
Output price / 1M$0.50$0.60
Blended price (3:1)$0.20$0.26
Cached input / 1M$0.01$0.075
Context window1.1M131K
Max output128K66K
Intelligence index37.311.6
Coding index30.4
Providers7
Best provider uptime (30m)100.0%
Vision inputYesNo
ReasoningYesYes
Tool callingYesYes
Released2026-09-222025-08-05
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FAQ

Which is cheaper, GPT-6 Luna or gpt-oss-120b?

GPT-6 Luna is 24% cheaper than gpt-oss-120b on a typical 3:1 input/output mix.

GPT-6 Luna vs gpt-oss-120b: which has a bigger context window?

GPT-6 Luna: 1,050,000 tokens. gpt-oss-120b: 131,072 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: GPT-6 Luna ≈ $450.00, gpt-oss-120b ≈ $600.00.

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