token.app › Compare › Grok 4.20 vs GLM 5.2
Grok 4.20 vs GLM 5.2
GLM 5.2 leads on 4 of 5 shared benchmarks. GLM 5.2 is 4.0× cheaper per token on a blended 3:1 basis. Grok 4.20 accepts the larger context window (2M).
Head to head
Blended price uses a 3:1 input:output mix
| Grok 4.20 | GLM 5.2 | |
|---|---|---|
| Provider | xAI | Zhipu AI |
| Input $/1M | $1.25 | $0.252 |
| Output $/1M | $2.50 | $0.792 |
| Blended $/1M | $1.56 | $0.387 |
| Context window | 2M | 1.0M |
| Max output | — | 128K |
| Released | Mar 2026 | Jun 2026 |
| Licence | Proprietary | Open weights |
| GPQA Diamond | 89.3% | 91.9% |
| FrontierMath T1–3 | 44.9% | 59.2% |
| FrontierMath T4 | 17.1% | 29.3% |
| SimpleQA Verified | 35.1% | 38.1% |
| OTIS Mock AIME | 92.2% | 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 Grok 4.20 if…
- Higher OTIS Mock AIME (92.2% vs 86.4%)
- Larger context window (2M)
Choose GLM 5.2 if…
- Costs less per token — $0.387 vs $1.56 blended
- Higher GPQA Diamond (91.9% vs 89.3%)
- Higher FrontierMath T1–3 (59.2% vs 44.9%)
- Higher FrontierMath T4 (29.3% vs 17.1%)
- Higher SimpleQA Verified (38.1% vs 35.1%)
- Open weights — self-hostable
- Newer model (released Jun 2026)
FAQ
Which is better, Grok 4.20 or GLM 5.2?
Across the 5 benchmarks both models have independently-run scores for, Grok 4.20 leads on 1 and GLM 5.2 leads on 4. Benchmarks are one input — price and context window are on this page too.
Is Grok 4.20 cheaper than GLM 5.2?
GLM 5.2 is cheaper: $0.387 versus $1.56 per million tokens blended at 3:1 input:output. Input alone: $1.25 vs $0.252. Output alone: $2.50 vs $0.792.
What context windows do Grok 4.20 and GLM 5.2 have?
Grok 4.20: 2,000,000 tokens. GLM 5.2: 1,048,576 tokens.
Who makes Grok 4.20 and GLM 5.2?
Grok 4.20 is made by xAI. GLM 5.2 is made by Zhipu AI.