token.app › Compare › Claude Sonnet 4 vs GLM 5.2
Claude Sonnet 4 vs GLM 5.2
GLM 5.2 leads on 2 of 2 shared benchmarks. GLM 5.2 is 16× 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 Sonnet 4 | GLM 5.2 | |
|---|---|---|
| Provider | Anthropic | Zhipu AI |
| Input $/1M | $3.00 | $0.252 |
| Output $/1M | $15.00 | $0.792 |
| Blended $/1M | $6.00 | $0.387 |
| Context window | 1M | 1.0M |
| Max output | 64K | 128K |
| Released | May 2025 | Jun 2026 |
| Licence | Proprietary | Open weights |
| GPQA Diamond | 79.2% | 91.9% |
| OTIS Mock AIME | 71.1% | 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 Claude Sonnet 4 if…
- No clear advantage on the data we hold.
Choose GLM 5.2 if…
- Costs less per token — $0.387 vs $6.00 blended
- Higher GPQA Diamond (91.9% vs 79.2%)
- Higher OTIS Mock AIME (86.4% vs 71.1%)
- Larger context window (1.0M)
- Open weights — self-hostable
- Newer model (released Jun 2026)
FAQ
Which is better, Claude Sonnet 4 or GLM 5.2?
Across the 2 benchmarks both models have independently-run scores for, Claude Sonnet 4 leads on 0 and GLM 5.2 leads on 2. Benchmarks are one input — price and context window are on this page too.
Is Claude Sonnet 4 cheaper than GLM 5.2?
GLM 5.2 is cheaper: $0.387 versus $6.00 per million tokens blended at 3:1 input:output. Input alone: $3.00 vs $0.252. Output alone: $15.00 vs $0.792.
What context windows do Claude Sonnet 4 and GLM 5.2 have?
Claude Sonnet 4: 1,000,000 tokens. GLM 5.2: 1,048,576 tokens.
Who makes Claude Sonnet 4 and GLM 5.2?
Claude Sonnet 4 is made by Anthropic. GLM 5.2 is made by Zhipu AI.