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GPT-5.6 Luna
🇺🇸OpenAI1w
Context:1.1M tokens
Input:$1/1M
Output:$6/1M
Neura Index
77.3
Rank #34—
mediumCategory Profile
Benchmark Scores (7)
reasoning
| Benchmark | Score | Source |
|---|---|---|
| GPQA Diamond | 92.3 | verified |
coding
| Benchmark | Score | Source |
|---|---|---|
| SWE-Bench Pro | 62.7 | verified |
multimodal
| Benchmark | Score | Source |
|---|---|---|
| MMMU-Pro | 78.4 | verified |
Performance History
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Frequently Asked Questions about GPT-5.6 Luna
What is GPT-5.6 Luna's Neura Intelligence Index score?▾
GPT-5.6 Luna by OpenAI scores 77.3 out of 100 on the Neura Intelligence Index, ranking #34 among tracked AI models. This composite score is computed from 7 individual benchmarks across coding, math, reasoning, and language categories.
How much does GPT-5.6 Luna cost to use?▾
GPT-5.6 Luna costs $1/1M input tokens and $6/1M output tokens via API. At a typical 3:1 input-to-output ratio with 1M tokens/day usage, the estimated monthly cost is approximately $68.
Is GPT-5.6 Luna open source?▾
No, GPT-5.6 Luna is a proprietary model by OpenAI. It is only accessible via their API.
What is GPT-5.6 Luna's context window?▾
GPT-5.6 Luna supports a context window of 1.1 million tokens, allowing it to process very long documents, codebases, and conversations in a single request.
What benchmark does GPT-5.6 Luna perform best on?▾
GPT-5.6 Luna achieves its highest score on GPQA Diamond with a score of 92.3%. This benchmark evaluates 448 graduate-level science questions (biology, chemistry, physics) designed to be hard for non-experts.