Claude Opus 5.5 vs GLM-5
Claude Opus 5.5 
GLM-5 Verdict
- Claude Opus 5.5 (thinking) leads on quality: 70.7 vs 59.4.
- Claude Opus 5.5 (thinking) is stronger in composite, knowledge, long context, multimodal, reasoning.
- GLM-5 (thinking) is stronger in agents & tools, coding, instruction following, maths.
- GLM-5 (thinking) is 5.2× cheaper ($1.55 vs $8.00 per 1M blended).
- GLM-5 (thinking) streams 1.5× faster (70 vs 48 tokens per second).
| Metric | Claude Opus 5.5 (thinking) | GLM-5 (thinking) |
|---|---|---|
| BenchLeader Index | 70.7 | 59.4 |
| Composite score | 95.0 | 63.2 |
| Knowledge score | 85.0 | 58.9 |
| Long context score | 68.5 | 63.9 |
| Multimodal score | 71.9 | – |
| Reasoning score | 95.0 | 53.1 |
| Agents & tools score | – | 57.9 |
| Coding score | – | 59.2 |
| Instruction following score | – | 70.7 |
| Maths score | – | 63.2 |
| Blended price $/M | $8.00 | $1.55 |
| Output speed | 48 tok/s | 70 tok/s |
| Time to first answer | 4.2 s | 46.1 s |
| Context window | 1M | 205k |
| AA Intelligence Index | 57.6 | 27.9 |
| IFBench | – | 72.3% |
| AA-LCR | 84.7% | 75.7% |
| MMMU-Pro | 87.7% | – |
| AA-Omniscience | 46.4 | 0.3 |
| Terminal-Bench Hard | – | 43.2% |
| GPQA Diamond (AA) | – | 82.0% |
| Humanity's Last Exam (AA) | 61.4% | 29.3% |
| SciCode (AA) | 66.9% | – |
| τ²-Bench Telecom (AA) | – | 98.3% |
| AIME (Vals) | – | 91.7% |
| LiveCodeBench | – | 81.9% |
| MMLU-Pro | – | 86.0% |
| LegalBench | – | 84.1% |
| CorpFin | – | 62.9% |
| TaxEval | – | 70.0% |
| MedQA | – | 94.3% |
| SWE-bench (Vals) | – | 71.4% |
| GPQA Diamond (Vals) | – | 83.3% |
| Kagi LLM Benchmark | – | 75.0% |
| τ²-bench | – | 81.0% |
| CritPt | 31.7% | 2.0% |
| GDPval (AA) | 67.3% | – |
| APEX-Agents (AA) | – | 14.4% |
| CaseLaw v2 | – | 52.5% |
| Terminal-Bench 2.0 (Vals) | – | 49.4% |
| Vibe Code Bench v1.1 | – | 23.4% |
| Terminal-Bench 4.0 (AA) | 59.6% | – |
| AutomationBench | 69.5% | – |
| GDP.pdf | 26.2% | – |
| Harvey LAB | 91.2% | – |
| AA-Omniscience: accuracy | 66.2% | 26.3% |
| AA-Omniscience: non-hallucination | 41.4% | 64.7% |
| AA-Briefcase | 1822 | – |
Data as of 2026-09-22. Best configuration of each model; every score links to its source on the model pages.
Claude Opus 5.5 vs GLM-5: questions
- Is Claude Opus 5.5 better than GLM-5?
- Claude Opus 5.5 (thinking) leads on quality: 70.7 vs 59.4. The BenchLeader Index combines every independent quality benchmark; Claude Opus 5.5 (thinking) is ahead overall as of 2026-09-22, but check the category scores for your use.
- Which is cheaper, Claude Opus 5.5 or GLM-5?
- GLM-5 is cheaper: $1.55 against $8.00 per million tokens, blended at three input tokens per output token.
- Which is faster, Claude Opus 5.5 or GLM-5?
- GLM-5 streams faster: 70 against 48 output tokens per second.
- Which has the larger context window?
- Claude Opus 5.5 accepts more context: 1M against 205k tokens.