Claude Opus 4.5 vs GLM 5.1
Head to head on 23 shared benchmarks, with price, context window, and release dates.
Benchmark scores
53evals · sort by any column, ⤢ to expand fullscreen
| Model | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Claude Opus 4.5 Anthropic | 61.3% | 1683elo | 73.1 | 20.7% | 81.0% | 13.2% | 43.0% | 78.1% | 79.7% | 74.4% | 62.5% | 81.3% | 90.4% | 80.1% | 45.2% | 83.2% | 88.9% | 36.0% | 47.0% | 74.3% | 40.9% | 20.6% | 86.3% | 62.7% | - | - | - | 16.7% | - | 35.6% | 6.1% | - | - | 84.7% | - | 12.13 | 83.8% | 83.5% | 73.8% | - | 68.7% | 100.0% | 37.4 | 77.5% | 45.0% | - | - | 45.3 | 70.7% | 79.2% | 61.8 | - | - | 62.2% |
| GLM 5.1 Zai | 64.5% | 1589elo | 73.5 | 33.5% | 83.9% | 27.9% | 52.0% | 72.7% | 75.4% | 63.2% | 68.5% | 71.8% | 84.9% | 72.5% | 41.6% | 72.3% | 85.4% | 22.2% | 36.1% | 71.2% | 35.6% | 31.5% | 97.1% | - | 20.8% | 35.9% | 1.13 | - | 40.0% | - | - | 44.8% | 34.7% | - | 15.1% | - | - | - | - | 67.0% | - | - | - | - | - | 34.6% | 5.24 | - | - | - | - | 69.8 | 52.5% | 53.6% |
2 / 2 models
| Attribute | Claude Opus 4.5 Anthropic | GLM 5.1 Zai |
|---|---|---|
| Description | Claude Opus 4.5 is an AI model from Anthropic. | GLM-5.1 is an AI model from Zai, released with open weights. |
| Family | Claude | Glm |
| Params | - | - |
| Open weights | closed | open |
| License | proprietary | mit |
| Released | 24 Nov 2025 | 7 Apr 2026 |
| Context | 200,000 | 204,800 |
| Input $/1M | $5.00 | $1.39 |
| Output $/1M | $25.00 | $4.40 |
| Cache read $/1M | $0.500 | $0.234 |
| Cache write $/1M | $6.250 | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | file, image, text | text |
| Providers | - | - |
| Publisher | Anthropic | Zai |
| Reported scores | IFBench52.0% (AA) τ²-bench (Tau²-bench)97.1% (AA) Terminal-Bench (Hard)35.6% (AA) Vals Index52.5% Vibe Code Bench v1.131.5% |
FAQ
- Is Claude Opus 4.5 or GLM 5.1 better?
- Across the 23 benchmarks both models report on Sophon, Claude Opus 4.5 leads on 14 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude Opus 4.5 and GLM 5.1 compare on GPQA Diamond?
- Claude Opus 4.5 scores 81.0% and GLM 5.1 scores 83.9% on GPQA Diamond.
- Which is cheaper, Claude Opus 4.5 or GLM 5.1?
- GLM 5.1 is cheaper at $4.40 per million output tokens against $25.00 for Claude Opus 4.5 - about 5.7x.
- When were Claude Opus 4.5 and GLM 5.1 released?
- Claude Opus 4.5 was released 24 Nov 2025 by Anthropic. GLM 5.1 was released 7 Apr 2026 by Zai.
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