GLM 5.1 vs GPT-5.6 Sol
GLM 5.1 
GPT-5.6 Sol Verdict
- GPT-5.6 Sol (high) leads on quality: 68.2 vs 60.2.
- GLM 5.1 is stronger in human preference, instruction following, maths.
- GPT-5.6 Sol (high) is stronger in agents & tools, coding, composite, knowledge, long context, reasoning, multimodal.
- GLM 5.1 is 3.7× cheaper ($2.15 vs $8.00 per 1M blended).
| Metric | GLM 5.1 | GPT-5.6 Sol (high) |
|---|---|---|
| BenchLeader Index | 60.2 | 68.2 |
| Agents & tools score | 56.8 | 87.9 |
| Coding score | 57.3 | 72.4 |
| Composite score | 62.4 | 82.7 |
| Human preference score | 66.6 | – |
| Instruction following score | 73.9 | 67.8 |
| Knowledge score | 56.6 | 73.8 |
| Long context score | 63.3 | 67.4 |
| Maths score | 53.0 | – |
| Reasoning score | 61.4 | 63.3 |
| Multimodal score | – | 66.4 |
| Blended price $/M | $2.15 | $8.00 |
| Output speed | 65 tok/s | 59 tok/s |
| Time to first answer | 60.1 s | 31.0 s |
| Context window | 200k | 1M |
| GPQA Diamond | 89.9% | – |
| FrontierMath Tiers 1–3 | 36.8% | – |
| OTIS Mock AIME | 93.3% | – |
| SWE-bench Verified (Epoch) | 74.2% | – |
| SimpleQA Verified | 34.0% | – |
| SimpleBench | 55.1% | – |
| SciCode | 43.8% | 56.9% |
| WeirdML | 57.1% | 88.8% |
| ProofBench | 22.2% | – |
| Epoch Capabilities Index | 149.7 | – |
| LMArena Text | 1466 | – |
| LMArena Hard Prompts | 1489 | – |
| LMArena Coding | 1514 | – |
| LMArena WebDev | 1508 | – |
| AA Intelligence Index | 26.4 | 42.5 |
| IFBench | 76.3% | 69.2% |
| AA-LCR | 73.7% | 81.7% |
| MMMU-Pro | – | 81.8% |
| AA-Omniscience | 0.8 | 20.4 |
| Terminal-Bench Hard | 43.2% | 62.1% |
| GPQA Diamond (AA) | 86.8% | 92.8% |
| Humanity's Last Exam (AA) | 30.1% | 46.0% |
| SciCode (AA) | 44.8% | 57.8% |
| τ²-Bench Telecom (AA) | 97.7% | 83.3% |
| AIME (Vals) | 91.9% | – |
| LiveCodeBench | 81.4% | – |
| MMLU-Pro | 86.9% | – |
| LegalBench | 84.4% | – |
| CorpFin | 64.5% | – |
| TaxEval | 71.2% | – |
| Terminal-Bench 2.1 (Vals) | 56.9% | – |
| SWE-bench (Vals) | 76.4% | – |
| GPQA Diamond (Vals) | 84.5% | – |
| AIME 2026 | 95.8% | – |
| HMMT February 2026 | 89.4% | – |
| MathArena Apex | 11.5% | – |
| MCP Atlas | 75.6% | – |
| EnigmaEval | – | 37.1% |
| ARC-AGI-1 | – | 97.0% |
| ARC-AGI-2 | – | 85.4% |
| ARC-AGI-3 | – | 2.2% |
Data as of 2026-09-10. Best configuration of each model; every score links to its source on the model pages.
GLM 5.1 vs GPT-5.6 Sol: questions
- Is GLM 5.1 better than GPT-5.6 Sol?
- GPT-5.6 Sol (high) leads on quality: 68.2 vs 60.2. The BenchLeader Index combines every independent quality benchmark; GPT-5.6 Sol (high) is ahead overall as of 2026-09-10, but check the category scores for your use.
- Is GLM 5.1 better than GPT-5.6 Sol for coding?
- GPT-5.6 Sol scores higher in coding (72 vs 57 on the category index, where 50 is average).
- Is GLM 5.1 better than GPT-5.6 Sol for agentic tasks?
- GPT-5.6 Sol scores higher in agentic tasks (88 vs 57 on the category index, where 50 is average).
- Which is cheaper, GLM 5.1 or GPT-5.6 Sol?
- GLM 5.1 is cheaper: $2.15 against $8.00 per million tokens, blended at three input tokens per output token.
- Which is faster, GLM 5.1 or GPT-5.6 Sol?
- GLM 5.1 streams faster: 65 against 59 output tokens per second.
- Which has the larger context window?
- GPT-5.6 Sol accepts more context: 1M against 200k tokens.