Claude 3.5 Sonnet vs GLM 5.1
Head to head on 13 shared benchmarks, with price, context window, and release dates.
Benchmark scores
52evals · sort by any column, ⤢ to expand fullscreen
| Model | |||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GLM 5.1 Zai | 64.5% | 1594elo | 73.5 | 33.5% | 89.9% | 30.1% | 72.7% | 75.4% | 68.5% | 71.8% | 85.4% | 44.8% | 71.2% | - | - | - | - | 20.8% | - | 35.9% | 1.13 | 34.0% | - | 44.8% | 34.7% | 15.1% | - | 76.3% | - | 63.2% | 84.9% | 72.5% | - | - | 67.0% | 41.6% | 72.3% | - | 22.2% | - | 34.6% | 5.24 | - | - | - | 43.2% | 69.8 | - | 52.5% | 31.5% | - | 97.7% | 55.1% |
| Claude 3.5 Sonnet Anthropic | 53.6% | 1451elo | 58.4 | 2.1% | 55.3% | 4.1% | 63.7% | 65.6% | 69.2% | 56.4% | 77.2% | 36.6% | 70.2% | 51.6% | 15.7% | 3.3% | 52.4% | - | 24.2% | - | - | - | 28.0% | - | - | - | 96.4 | - | 0.0% | - | - | - | 38.1% | 77.1% | - | - | - | 64.1% | - | 0.0% | - | - | 51.3% | 25.3% | 63.4% | - | - | 0.98 | - | - | 62.6% | - | 42.7% |
2 / 2 models
| Attribute | Claude 3.5 Sonnet Anthropic | GLM 5.1 Zai |
|---|---|---|
| Description | Claude Sonnet 3.5 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 | 22 Oct 2024 | 7 Apr 2026 |
| Context | 200,000 | 204,800 |
| Input $/1M | $3.00 | $1.28 |
| Output $/1M | $15.00 | $4.07 |
| Cache read $/1M | - | $0.260 |
| Cache write $/1M | - | - |
| Speed | 0 tok/s | 0 tok/s |
| Latency | 0.00 s | 0.00 s |
| Modalities | text, image | text |
| Providers | - | - |
| Publisher | Anthropic | Zai |
| Reported scores | MortgageTax64.1% Traveling Salesman0.98 (3 samples) SWE-bench Verified63.4% (SWE-bench) SWE-bench Lite51.3% (SWE-bench) SWE-bench Multimodal25.3% (SWE-bench) | IFBench76.3% (AA) τ²-bench (Tau²-bench)97.7% (AA) Terminal-Bench (Hard)43.2% (AA) Vals Index52.5% Vibe Code Bench v1.131.5% |
FAQ
- Is Claude 3.5 Sonnet or GLM 5.1 better?
- Across the 13 benchmarks both models report on Sophon, GLM 5.1 leads on 12 of them. Which one is "better" depends on the benchmark - the table above shows every shared score.
- How do Claude 3.5 Sonnet and GLM 5.1 compare on GPQA Diamond?
- Claude 3.5 Sonnet scores 55.3% and GLM 5.1 scores 89.9% on GPQA Diamond.
- Which is cheaper, Claude 3.5 Sonnet or GLM 5.1?
- GLM 5.1 is cheaper at $4.07 per million output tokens against $15.00 for Claude 3.5 Sonnet - about 3.7x.
- When were Claude 3.5 Sonnet and GLM 5.1 released?
- Claude 3.5 Sonnet was released 22 Oct 2024 by Anthropic. GLM 5.1 was released 7 Apr 2026 by Zai.
Other head-to-heads
56Gemini 3.1 Pro Preview vs GLM 5.132 shared evalsGLM 5.1 vs GPT-5.531 shared evalsClaude Opus 4.7 vs GLM 5.128 shared evalsClaude Opus 4.8 vs GLM 5.127 shared evalsClaude Opus 4.6 vs GLM 5.127 shared evalsGLM 5.1 vs GPT-5.426 shared evalsGLM 5.1 vs Kimi K2.526 shared evalsGLM 5.1 vs GPT-5 Mini25 shared evalsGLM 5.1 vs GPT-5.225 shared evalsClaude Fable 5 vs GLM 5.125 shared evalsClaude Sonnet 4.6 vs GLM 5.125 shared evalsDeepSeek V3.2 vs GLM 5.124 shared evalsClaude Sonnet 4.5 vs GLM 5.123 shared evalsClaude Opus 4.5 vs GLM 5.123 shared evalsGLM 5.1 vs Qwen3.6 Plus23 shared evalsGLM 5.1 vs Grok 4.1 Fast23 shared evalsGLM 4.7 vs GLM 5.122 shared evalsClaude 3.5 Sonnet vs GPT-4o22 shared evalsGLM 5.1 vs GPT-5 Nano21 shared evalsClaude 3.5 Sonnet vs Claude 4 Sonnet21 shared evalsClaude 3.5 Sonnet vs Gemini 2.5 Pro21 shared evalsClaude 4 Sonnet vs GLM 5.120 shared evalsClaude 3.5 Sonnet vs Claude Sonnet 4.519 shared evalsClaude 3.5 Sonnet vs GPT-5 Mini19 shared evalsClaude 3.5 Sonnet vs GPT-4o-mini19 shared evalsGemini 2.5 Pro vs GLM 5.119 shared evalsGLM 5.1 vs gpt-oss-120b19 shared evalsClaude 3.5 Sonnet vs GPT-4.118 shared evalsClaude 3.5 Sonnet vs GPT-4.1 Mini17 shared evalsClaude 3.5 Sonnet vs GPT-517 shared evalsClaude 3.5 Sonnet vs GPT-5 Nano17 shared evalsClaude 3.5 Sonnet vs GPT-5.217 shared evalsClaude 3.5 Sonnet vs Claude Opus 4.517 shared evalsClaude 3.5 Sonnet vs DeepSeek V3.217 shared evalsGLM 5.1 vs GPT-516 shared evalsClaude 3.5 Sonnet vs GPT-4.1 Nano16 shared evalsClaude 3.5 Sonnet vs gpt-oss-120b16 shared evalsClaude 3.5 Sonnet vs Kimi K2.515 shared evalsClaude 3.5 Sonnet vs Grok 4.1 Fast15 shared evalsClaude 3.5 Sonnet vs GLM 4.715 shared evalsClaude 3.5 Sonnet vs GPT-5.514 shared evalsClaude 3.5 Sonnet vs Claude Opus 4.614 shared evalsGLM 5.1 vs GPT-6 Astra14 shared evalsGLM 5.1 vs GPT-4o14 shared evalsClaude 3.5 Sonnet vs Gemini 3.1 Pro Preview13 shared evalsClaude 3.5 Sonnet vs Claude Opus 4.813 shared evalsClaude 3.5 Sonnet vs GPT-5.413 shared evalsClaude 3.5 Sonnet vs Claude Sonnet 4.613 shared evalsClaude 3.5 Sonnet vs Claude Opus 4.713 shared evalsClaude 3.5 Sonnet vs Claude Fable 512 shared evalsGLM 5.1 vs GPT-4o-mini12 shared evalsGLM 5.1 vs GPT-4.1 Nano12 shared evalsGLM 5.1 vs GPT-4.1 Mini11 shared evalsGLM 5.1 vs GPT-4.111 shared evalsClaude 3.5 Sonnet vs Qwen3.6 Plus11 shared evalsClaude 3.5 Sonnet vs GPT-6 Astra6 shared evals
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