token.app › Compare › Claude Sonnet 4.5 vs GLM 5.2
Claude Sonnet 4.5 vs GLM 5.2
GLM 5.2 leads on 6 of 6 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 4.5 | 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 | Sep 2025 | Jun 2026 |
| Licence | Proprietary | Open weights |
| GPQA Diamond | 82.3% | 91.9% |
| SWE-bench Verified | 71.3% | 78.7% |
| FrontierMath T1–3 | 23.9% | 59.2% |
| FrontierMath T4 | 2.4% | 29.3% |
| SimpleQA Verified | 23.6% | 38.1% |
| OTIS Mock AIME | 77.8% | 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 4.5 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 82.3%)
- Higher SWE-bench Verified (78.7% vs 71.3%)
- Higher FrontierMath T1–3 (59.2% vs 23.9%)
- Higher FrontierMath T4 (29.3% vs 2.4%)
- Larger context window (1.0M)
- Open weights — self-hostable
- Newer model (released Jun 2026)
FAQ
Which is better, Claude Sonnet 4.5 or GLM 5.2?
Across the 6 benchmarks both models have independently-run scores for, Claude Sonnet 4.5 leads on 0 and GLM 5.2 leads on 6. Benchmarks are one input — price and context window are on this page too.
Is Claude Sonnet 4.5 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 4.5 and GLM 5.2 have?
Claude Sonnet 4.5: 1,000,000 tokens. GLM 5.2: 1,048,576 tokens.
Who makes Claude Sonnet 4.5 and GLM 5.2?
Claude Sonnet 4.5 is made by Anthropic. GLM 5.2 is made by Zhipu AI.
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