GLM 5.2 vs GPT-6 Luna
Price, context window & benchmark comparison
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Verdict: GPT-6 Luna is 5.0× cheaper than GLM 5.2 on a typical 3:1 input/output mix. GPT-6 Luna scores higher on the Artificial Analysis Intelligence Index (37.3 vs 33.7). GPT-6 Luna has the larger context window (1.1M vs 1M).
| GLM 5.2 | GPT-6 Luna | |
|---|---|---|
| Input price / 1M | $0.65 | $0.10 |
| Output price / 1M | $2.04 | $0.50 |
| Blended price (3:1) | $1.00 | $0.20 |
| Cached input / 1M | $0.12 | $0.01 |
| Context window | 1M | 1.1M |
| Max output | 131K | 128K |
| Intelligence index | 33.7 | 37.3 |
| Coding index | 68.8 | — |
| Providers | — | 7 |
| Best provider uptime (30m) | — | 100.0% |
| Vision input | No | Yes |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2026-06-16 | 2026-09-22 |
| Retirement | — | — |
Cost calculator
FAQ
Which is cheaper, GLM 5.2 or GPT-6 Luna?
GPT-6 Luna is 5.0× cheaper than GLM 5.2 on a typical 3:1 input/output mix.
GLM 5.2 vs GPT-6 Luna: which has a bigger context window?
GLM 5.2: 1,048,576 tokens. GPT-6 Luna: 1,050,000 tokens.
How much would 1 million requests cost?
At 2,000 input + 500 output tokens per request: GLM 5.2 ≈ $2,320, GPT-6 Luna ≈ $450.00.
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