GPT-5.6 Luna vs Qwen3.8 27B
Price, context window & benchmark comparison
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Verdict: GPT-5.6 Luna is 2.4× cheaper than Qwen3.8 27B on a typical 3:1 input/output mix. GPT-5.6 Luna scores higher on the Artificial Analysis Intelligence Index (37.3 vs 33.7). GPT-5.6 Luna has the larger context window (1.1M vs 1M).
| GPT-5.6 Luna | Qwen3.8 27B | |
|---|---|---|
| Input price / 1M | $0.20 | $0.42 |
| Output price / 1M | $1.20 | $3.00 |
| Blended price (3:1) | $0.45 | $1.06 |
| Cached input / 1M | $0.02 | $0.085 |
| Context window | 1.1M | 1M |
| Max output | 128K | 131K |
| Intelligence index | 37.3 | 33.7 |
| Coding index | 71.4 | 68.1 |
| Providers | 7 | 16 |
| Best provider uptime (30m) | 100.0% | 100.0% |
| Vision input | Yes | Yes |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2026-07-09 | 2026-08-14 |
| Retirement | — | — |
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FAQ
Which is cheaper, GPT-5.6 Luna or Qwen3.8 27B?
GPT-5.6 Luna is 2.4× cheaper than Qwen3.8 27B on a typical 3:1 input/output mix.
GPT-5.6 Luna vs Qwen3.8 27B: which has a bigger context window?
GPT-5.6 Luna: 1,050,000 tokens. Qwen3.8 27B: 1,000,000 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: GPT-5.6 Luna ≈ $1,000, Qwen3.8 27B ≈ $2,340.
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