token.app › Compare › gpt-oss-120b vs GLM 5.2
gpt-oss-120b vs GLM 5.2
GLM 5.2 leads on 2 of 3 shared benchmarks. gpt-oss-120b is 5.5× 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-oss-120b | GLM 5.2 | |
|---|---|---|
| Provider | OpenAI | Zhipu AI |
| Input $/1M | $0.037 | $0.252 |
| Output $/1M | $0.170 | $0.792 |
| Blended $/1M | $0.070 | $0.387 |
| Context window | 131K | 1.0M |
| Max output | 131K | 128K |
| Released | Aug 2025 | Jun 2026 |
| Licence | Open weights | Open weights |
| GPQA Diamond | 75.8% | 91.9% |
| SimpleQA Verified | 13.9% | 38.1% |
| OTIS Mock AIME | 88.9% | 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-oss-120b if…
- Costs less per token — $0.070 vs $0.387 blended
- Higher OTIS Mock AIME (88.9% vs 86.4%)
Choose GLM 5.2 if…
- Higher GPQA Diamond (91.9% vs 75.8%)
- Higher SimpleQA Verified (38.1% vs 13.9%)
- Larger context window (1.0M)
- Newer model (released Jun 2026)
FAQ
Which is better, gpt-oss-120b or GLM 5.2?
Across the 3 benchmarks both models have independently-run scores for, gpt-oss-120b leads on 1 and GLM 5.2 leads on 2. Benchmarks are one input — price and context window are on this page too.
Is gpt-oss-120b cheaper than GLM 5.2?
gpt-oss-120b is cheaper: $0.070 versus $0.387 per million tokens blended at 3:1 input:output. Input alone: $0.037 vs $0.252. Output alone: $0.170 vs $0.792.
What context windows do gpt-oss-120b and GLM 5.2 have?
gpt-oss-120b: 131,072 tokens. GLM 5.2: 1,048,576 tokens.
Who makes gpt-oss-120b and GLM 5.2?
gpt-oss-120b is made by OpenAI. GLM 5.2 is made by Zhipu AI.