GPT-6 Luna vs Solar Pro 4
Price, context window & benchmark comparison
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Verdict: GPT-6 Luna is 24% cheaper than Solar Pro 4 on a typical 3:1 input/output mix. Solar Pro 4 scores higher on the Artificial Analysis Intelligence Index (28.2 vs 27.9). GPT-6 Luna has the larger context window (1.1M vs 524K).
| GPT-6 Luna | Solar Pro 4 | |
|---|---|---|
| Input price / 1M | $0.10 | $0.15 |
| Output price / 1M | $0.50 | $0.60 |
| Blended price (3:1) | $0.20 | $0.26 |
| Cached input / 1M | $0.01 | $0.03 |
| Context window | 1.1M | 524K |
| Max output | 128K | 131K |
| Intelligence index | 27.9 | 28.2 |
| Coding index | — | 52.7 |
| Providers | 8 | — |
| Best provider uptime (30m) | 100.0% | — |
| Vision input | Yes | No |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2026-09-22 | 2026-08-10 |
| Retirement | — | — |
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FAQ
Which is cheaper, GPT-6 Luna or Solar Pro 4?
GPT-6 Luna is 24% cheaper than Solar Pro 4 on a typical 3:1 input/output mix.
GPT-6 Luna vs Solar Pro 4: which has a bigger context window?
GPT-6 Luna: 1,050,000 tokens. Solar Pro 4: 524,288 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: GPT-6 Luna ≈ $450.00, Solar Pro 4 ≈ $600.00.
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