token.app › Compare › GPT-5.6 Luna vs GLM 5.2
GPT-5.6 Luna vs GLM 5.2
GPT-5.6 Luna leads on 4 of 5 shared benchmarks. GPT-5.6 Luna is 1.7× cheaper per token on a blended 3:1 basis. GPT-5.6 Luna accepts the larger context window (1.1M).
Head to head
Blended price uses a 3:1 input:output mix
| GPT-5.6 Luna | GLM 5.2 | |
|---|---|---|
| Provider | OpenAI | Zhipu AI |
| Input $/1M | $0.100 | $0.252 |
| Output $/1M | $0.600 | $0.792 |
| Blended $/1M | $0.225 | $0.387 |
| Context window | 1.1M | 1.0M |
| Max output | 128K | 128K |
| Released | Jul 2026 | Jun 2026 |
| Licence | Proprietary | Open weights |
| GPQA Diamond | 91.6% | 91.9% |
| FrontierMath T1–3 | 82.1% | 59.2% |
| FrontierMath T4 | 61.0% | 29.3% |
| SimpleQA Verified | 41.7% | 38.1% |
| OTIS Mock AIME | 98.3% | 86.4% |
Benchmark scores independently run and published by Epoch AI, 'AI Benchmarking Hub', used under CC BY 4.0. Only benchmarks with a score for BOTH models are compared.
Choose GPT-5.6 Luna if…
- Costs less per token — $0.225 vs $0.387 blended
- Higher FrontierMath T1–3 (82.1% vs 59.2%)
- Higher FrontierMath T4 (61.0% vs 29.3%)
- Higher SimpleQA Verified (41.7% vs 38.1%)
- Higher OTIS Mock AIME (98.3% vs 86.4%)
- Larger context window (1.1M)
- Newer model (released Jul 2026)
Choose GLM 5.2 if…
- Higher GPQA Diamond (91.9% vs 91.6%)
- Open weights — self-hostable
FAQ
Which is better, GPT-5.6 Luna or GLM 5.2?
Across the 5 benchmarks both models have independently-run scores for, GPT-5.6 Luna leads on 4 and GLM 5.2 leads on 1. Benchmarks are one input — price and context window are on this page too.
Is GPT-5.6 Luna cheaper than GLM 5.2?
GPT-5.6 Luna is cheaper: $0.225 versus $0.387 per million tokens blended at 3:1 input:output. Input alone: $0.100 vs $0.252. Output alone: $0.600 vs $0.792.
What context windows do GPT-5.6 Luna and GLM 5.2 have?
GPT-5.6 Luna: 1,050,000 tokens. GLM 5.2: 1,048,576 tokens.
Who makes GPT-5.6 Luna and GLM 5.2?
GPT-5.6 Luna is made by OpenAI. GLM 5.2 is made by Zhipu AI.