GLM 5.3 Prime vs GPT-5.6 Luna
Price, context window & benchmark comparison
VS
Compare different models
Verdict: GPT-5.6 Luna is 9.6× cheaper than GLM 5.3 Prime on a typical 3:1 input/output mix. GPT-5.6 Luna has the larger context window (1.1M vs 1M).
| GLM 5.3 Prime | GPT-5.6 Luna | |
|---|---|---|
| Input price / 1M | $2.80 | $0.20 |
| Output price / 1M | $8.80 | $1.20 |
| Blended price (3:1) | $4.30 | $0.45 |
| Cached input / 1M | $0.56 | $0.02 |
| Context window | 1M | 1.1M |
| Max output | 131K | 128K |
| Intelligence index | — | 37.3 |
| Coding index | — | 71.4 |
| Providers | 1 | 7 |
| Best provider uptime (30m) | 100.0% | 100.0% |
| Vision input | No | Yes |
| Reasoning | Yes | Yes |
| Tool calling | Yes | Yes |
| Released | 2026-09-23 | 2026-07-09 |
| Retirement | — | — |
Cost calculator
FAQ
Which is cheaper, GLM 5.3 Prime or GPT-5.6 Luna?
GPT-5.6 Luna is 9.6× cheaper than GLM 5.3 Prime on a typical 3:1 input/output mix.
GLM 5.3 Prime vs GPT-5.6 Luna: which has a bigger context window?
GLM 5.3 Prime: 1,000,000 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: GLM 5.3 Prime ≈ $10,000, GPT-5.6 Luna ≈ $1,000.
More comparisons
GLM 5.3 Prime vs Qwen3.8 Max PrimeGLM 5.3 Prime vs Command A+GLM 5.3 Prime vs GPT-6 Luna ProGLM 5.3 Prime vs GPT-6 LunaGLM 5.3 Prime vs GPT-6 Sol ProGLM 5.3 Prime vs GPT-6 SolGLM 5.3 Prime vs Claude Opus 5.5GLM 5.3 Prime vs MiMo-V2.6-Pro-UltraSpeedGLM 5.3 Prime vs MiMo-V2.6-FlashGLM 5.3 Prime vs Grok 4.7GLM 5.3 Prime vs Qwen3.8 Omni FlashGLM 5.3 Prime vs GLM 5.3 FlashXGLM 5.3 Prime vs DeepSeek V4.1 FlashGLM 5.3 Prime vs GPT-6 AstraGLM 5.3 Prime vs GPT-6 Astra ProGLM 5.3 Prime vs Qwen3.8 Max (0902)GPT-5.6 Luna vs Qwen3.8 Max PrimeGPT-5.6 Luna vs Command A+GPT-5.6 Luna vs GPT-6 Luna ProGPT-5.6 Luna vs GPT-6 LunaGPT-5.6 Luna vs GPT-6 Sol ProGPT-5.6 Luna vs GPT-6 SolGPT-5.6 Luna vs Claude Opus 5.5GPT-5.6 Luna vs MiMo-V2.6-Pro-UltraSpeed