GPT-6 Luna
OpenAI · Released 22 Sep 2026 · gpt-6-luna
$0.10
Input price / 1M tokens
#1 of 61, cheapest first
$0.50
Output price / 1M tokens
#2 of 61, cheapest first
1.05M
Context window
#2 of 71
131
Output tokens / second
#22 of 61
66.6%
DeepSWE v1.1
#13 of 17
Summary
GPT-6 Luna is a proprietary model from OpenAI, released on 22 Sep 2026.
At $0.10 input and $0.50 output per million tokens, it is #1 of 61 on input price, cheapest first.
Its 1.05M-token context window ranks #2 of 71.
Measured output speed is 131 tokens per second, #22 of 61.
OpenAI's most efficient model, for focused, high-volume tasks.
Benchmarks · 1 reported
| Benchmark | Score | Bar | Rank | Source |
|---|---|---|---|---|
| DeepSWE v1.1max effort | 66.6% | #13 of 17 | OpenAI launch postSelf-reported |
Self-reported means the lab ran the test itself. A rank appears only where several labs report the same version of a benchmark.
Similar models
Models with the most benchmarks in common with GPT-6 Luna, and the closest scores.
DeepSWE v1.1
#13 of 17Long coding tasks in real repos
- GPT-6 Luna66.6
- GLM-5.366.9
- GPT-5.6 Luna67.2
- Kimi K367.5
- Gemini 3.7 Flash65.3
- GPT-6 Sol68.8
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Sources
- price, tiers, long-context rule: developers.openai.com/api/docs/pricing, checked 2 Oct 2026
- context, max output, knowledge cutoff (May 18 2026), modalities, api id: developers.openai.com/api/docs/models/gpt-6-luna, checked 2 Oct 2026
- release date (changelog Sep 22 2026): developers.openai.com/api/docs/changelog, checked 2 Oct 2026
- benchmarks: openai.com/index/introducing-gpt-6-sol-and-luna/, checked 2 Oct 2026
- output speed: artificialanalysis.ai/models/gpt-6-luna, checked 2 Oct 2026
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