Claude Opus 4.6 vs GLM 5.3
Claude Opus 4.6 
GLM 5.3 Verdict
- Claude Opus 4.6 (thinking) leads on quality: 62.5 vs 60.0.
- Claude Opus 4.6 (thinking) is stronger in knowledge, maths, reasoning.
- GLM 5.3 (max) is stronger in coding, agents & tools, human preference.
- GLM 5.3 (max) is 4.7× cheaper ($2.15 vs $10.00 per 1M blended).
- GLM 5.3 (max) streams 1.7× faster (66 vs 38 tokens per second).
| Metric | Claude Opus 4.6 (thinking) | GLM 5.3 (max) |
|---|---|---|
| BenchLeader Index | 62.5 | 60.0 |
| Coding score | 63.6 | 64.3 |
| Knowledge score | 62.2 | 55.8 |
| Maths score | 65.1 | 60.0 |
| Reasoning score | 75.6 | 66.9 |
| Agents & tools score | – | 52.8 |
| Human preference score | – | 68.9 |
| Blended price $/M | $10.00 | $2.15 |
| Output speed | 38 tok/s | 66 tok/s |
| Time to first answer | 2.0 s | 33.5 s |
| Context window | 1M | 1M |
| GPQA Diamond | – | 90.9% |
| FrontierMath Tiers 1–3 | – | 68.8% |
| FrontierMath Tier 4 | – | 29.3% |
| OTIS Mock AIME | – | 91.1% |
| SimpleQA Verified | – | 41.0% |
| Terminal-Bench | – | 41.8% |
| SciCode | – | 56.5% |
| WeirdML | – | 75.4% |
| ProofBench | – | 49.0% |
| LMArena Text | – | 1486 |
| LMArena Hard Prompts | – | 1509 |
| LMArena Coding | – | 1526 |
| LMArena WebDev | – | 1614 |
| LMArena Agent | – | 2.6 |
| AIME (Vals) | 95.6% | – |
| LiveCodeBench | 84.7% | 80.5% |
| MMLU-Pro | 89.1% | 86.8% |
| IOI | – | 68.4% |
| LegalBench | 85.3% | 84.8% |
| CorpFin | 67.0% | – |
| TaxEval | 76.0% | 72.4% |
| MedQA | 95.4% | – |
| Terminal-Bench 2.1 (Vals) | – | 71.5% |
| SWE-bench (Vals) | 78.2% | 95.4% |
| GPQA Diamond (Vals) | 89.7% | 88.1% |
| Vals Index | – | 57.0 |
| SWE-Bench Pro | 51.9% | – |
| Kagi LLM Benchmark | 83.6% | – |
Data as of 2026-09-13. Best configuration of each model; every score links to its source on the model pages.
Claude Opus 4.6 vs GLM 5.3: questions
- Is Claude Opus 4.6 better than GLM 5.3?
- Claude Opus 4.6 (thinking) leads on quality: 62.5 vs 60.0. The BenchLeader Index combines every independent quality benchmark; Claude Opus 4.6 (thinking) is ahead overall as of 2026-09-13, but check the category scores for your use.
- Is Claude Opus 4.6 better than GLM 5.3 for coding?
- GLM 5.3 scores higher in coding (64 vs 64 on the category index, where 50 is average).
- Which is cheaper, Claude Opus 4.6 or GLM 5.3?
- GLM 5.3 is cheaper: $2.15 against $10.00 per million tokens, blended at three input tokens per output token.
- Which is faster, Claude Opus 4.6 or GLM 5.3?
- GLM 5.3 streams faster: 66 against 38 output tokens per second.
- Which has the larger context window?
- Both accept 1M tokens of context.