token.app › Compare › Claude Opus 4.8 vs GLM 5.2
Claude Opus 4.8 vs GLM 5.2
Claude Opus 4.8 leads on 4 of 5 shared benchmarks. GLM 5.2 is 26× 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
| Claude Opus 4.8 | GLM 5.2 | |
|---|---|---|
| Provider | Anthropic | Zhipu AI |
| Input $/1M | $5.00 | $0.252 |
| Output $/1M | $25.00 | $0.792 |
| Blended $/1M | $10.00 | $0.387 |
| Context window | 1M | 1.0M |
| Max output | 128K | 128K |
| Released | May 2026 | Jun 2026 |
| Licence | Proprietary | Open weights |
| GPQA Diamond | 91.0% | 91.9% |
| FrontierMath T1–3 | 80.0% | 59.2% |
| FrontierMath T4 | 56.1% | 29.3% |
| SimpleQA Verified | 39.5% | 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 Claude Opus 4.8 if…
- Higher FrontierMath T1–3 (80.0% vs 59.2%)
- Higher FrontierMath T4 (56.1% vs 29.3%)
- Higher SimpleQA Verified (39.5% vs 38.1%)
- Higher OTIS Mock AIME (98.3% vs 86.4%)
Choose GLM 5.2 if…
- Costs less per token — $0.387 vs $10.00 blended
- Higher GPQA Diamond (91.9% vs 91.0%)
- Larger context window (1.0M)
- Open weights — self-hostable
- Newer model (released Jun 2026)
FAQ
Which is better, Claude Opus 4.8 or GLM 5.2?
Across the 5 benchmarks both models have independently-run scores for, Claude Opus 4.8 leads on 4 and GLM 5.2 leads on 1. Benchmarks are one input — price and context window are on this page too.
Is Claude Opus 4.8 cheaper than GLM 5.2?
GLM 5.2 is cheaper: $0.387 versus $10.00 per million tokens blended at 3:1 input:output. Input alone: $5.00 vs $0.252. Output alone: $25.00 vs $0.792.
What context windows do Claude Opus 4.8 and GLM 5.2 have?
Claude Opus 4.8: 1,000,000 tokens. GLM 5.2: 1,048,576 tokens.
Who makes Claude Opus 4.8 and GLM 5.2?
Claude Opus 4.8 is made by Anthropic. GLM 5.2 is made by Zhipu AI.