Gemini 3.7 Flash vs GPT-5.6 Luna
Gemini 3.7 Flash (Google DeepMind) and GPT-5.6 Luna (OpenAI) compared on benchmarks, pricing, context window, and use-case rankings.
- Gemini 3.7 Flash leads on overall intelligence (ECI 157 vs 156).
- GPT-5.6 Luna is cheaper on input tokens — $0.20 vs $0.75 per 1M.
- GPT-5.6 Luna has a larger context window (1.1M vs 1M tokens).
- Gemini 3.7 Flash ranks higher for coding (88th vs 69th percentile).
| Attribute | Gemini 3.7 Flash | GPT-5.6 Luna |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 157 | 156 |
| Coding | 88 | 69 |
| Math | 73 | 80 |
| Reasoning & Knowledge | 81 | 49 |
| Agentic & Tools | 94 | 51 |
| Specifications | ||
| Developer | Google DeepMind | OpenAI |
| Family | Gemini | GPT |
| Released | Aug 13, 2026 | Jul 9, 2026 |
| Parameters | — | — |
| Availability | API access | API access |
| Context window | 1M | 1.1M |
| Price — $/M input | $0.75 | $0.20 |
| Price — $/M output | $3.75 | $1.20 |
| Inputs | text, image, video, file, audio | file, image, text |
| Outputs | text | text |
| Benchmarks | ||
| AIME 2024/2025 | 97% | 98% |
| APEX | 68% | 43% |
| ARC-AGI | 96% | 88% |
| ARC-AGI-2 | 85% | 60% |
| GPQA Diamond | 95% | 92% |
| Humanity's Last Exam | 39% | 40% |
| SciCode | 60% | 54% |
| SimpleQA Verified | 69% | 41% |
| WebDev Arena | 1587 | 1519 |
| SimpleBench | — | 47% |
| WeirdML | — | 61% |
Use-case scores are 0–100 percentile composites across each area’s benchmarks, ranked against every model from the past year. Highlighted cells lead each row. Open a model for the full picture.
Frequently asked questions
Is Gemini 3.7 Flash better than GPT-5.6 Luna?
On Epoch AI's Capabilities Index, Gemini 3.7 Flash scores higher (157) than GPT-5.6 Luna (156). The right pick depends on your task — compare their coding, math, and reasoning scores in the table above.
Which is cheaper, Gemini 3.7 Flash or GPT-5.6 Luna?
GPT-5.6 Luna is cheaper on input tokens at $0.20 per million, versus $0.75 (representative OpenRouter pricing).
Which has a larger context window, Gemini 3.7 Flash or GPT-5.6 Luna?
GPT-5.6 Luna supports up to 1.1M tokens, compared with 1M for the other.
Which is better for coding, Gemini 3.7 Flash or GPT-5.6 Luna?
Across coding benchmarks like SWE-bench Verified and Terminal-Bench, Gemini 3.7 Flash ranks higher — 88th vs 69th percentile among the models tracked on Model Beat.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.