Gemini 3.7 Flash vs GPT-5.6 Luna
Price, context window & benchmark comparison
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Verdict: GPT-5.6 Luna is 3.3× cheaper than Gemini 3.7 Flash on a typical 3:1 input/output mix. Gemini 3.7 Flash scores higher on the Artificial Analysis Intelligence Index (39.1 vs 37.3). GPT-5.6 Luna has the larger context window (1.1M vs 1M).
| Gemini 3.7 Flash | GPT-5.6 Luna | |
|---|---|---|
| Input price / 1M | $0.75 | $0.20 |
| Output price / 1M | $3.75 | $1.20 |
| Blended price (3:1) | $1.50 | $0.45 |
| Cached input / 1M | $0.075 | $0.02 |
| Context window | 1M | 1.1M |
| Max output | 66K | 128K |
| Intelligence index | 39.1 | 37.3 |
| Coding index | 76.1 | 71.4 |
| Providers | 6 | 7 |
| Best provider uptime (30m) | 99.9% | 100.0% |
| Vision input | Yes | Yes |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2026-08-13 | 2026-07-09 |
| Retirement | — | — |
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FAQ
Which is cheaper, Gemini 3.7 Flash or GPT-5.6 Luna?
GPT-5.6 Luna is 3.3× cheaper than Gemini 3.7 Flash on a typical 3:1 input/output mix.
Gemini 3.7 Flash vs GPT-5.6 Luna: which has a bigger context window?
Gemini 3.7 Flash: 1,048,576 tokens. GPT-5.6 Luna: 1,050,000 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: Gemini 3.7 Flash ≈ $3,375, GPT-5.6 Luna ≈ $1,000.
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