token.app › Compare › GPT-5 Nano vs GLM 5.2
GPT-5 Nano vs GLM 5.2
GLM 5.2 leads on 5 of 5 shared benchmarks. GPT-5 Nano is 2.8× cheaper per token on a blended 3:1 basis. GLM 5.2 accepts the larger context window (1.0M).
Head to head
Blended price uses a 3:1 input:output mix
| GPT-5 Nano | GLM 5.2 | |
|---|---|---|
| Provider | OpenAI | Zhipu AI |
| Input $/1M | $0.050 | $0.252 |
| Output $/1M | $0.400 | $0.792 |
| Blended $/1M | $0.138 | $0.387 |
| Context window | 400K | 1.0M |
| Max output | 128K | 128K |
| Released | Aug 2025 | Jun 2026 |
| Licence | Proprietary | Open weights |
| GPQA Diamond | 69.4% | 91.9% |
| FrontierMath T1–3 | 20.0% | 59.2% |
| FrontierMath T4 | 2.4% | 29.3% |
| SimpleQA Verified | 12.2% | 38.1% |
| OTIS Mock AIME | 81.1% | 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 Nano if…
- Costs less per token — $0.138 vs $0.387 blended
Choose GLM 5.2 if…
- Higher GPQA Diamond (91.9% vs 69.4%)
- Higher FrontierMath T1–3 (59.2% vs 20.0%)
- Higher FrontierMath T4 (29.3% vs 2.4%)
- Higher SimpleQA Verified (38.1% vs 12.2%)
- Larger context window (1.0M)
- Open weights — self-hostable
- Newer model (released Jun 2026)
FAQ
Which is better, GPT-5 Nano or GLM 5.2?
Across the 5 benchmarks both models have independently-run scores for, GPT-5 Nano leads on 0 and GLM 5.2 leads on 5. Benchmarks are one input — price and context window are on this page too.
Is GPT-5 Nano cheaper than GLM 5.2?
GPT-5 Nano is cheaper: $0.138 versus $0.387 per million tokens blended at 3:1 input:output. Input alone: $0.050 vs $0.252. Output alone: $0.400 vs $0.792.
What context windows do GPT-5 Nano and GLM 5.2 have?
GPT-5 Nano: 400,000 tokens. GLM 5.2: 1,048,576 tokens.
Who makes GPT-5 Nano and GLM 5.2?
GPT-5 Nano is made by OpenAI. GLM 5.2 is made by Zhipu AI.