GLM 5.3 vs GPT-5.4 Pro
GLM 5.3 
GPT-5.4 Pro Verdict
- GPT-5.4 Pro leads on quality: 64.3 vs 60.0.
- GLM 5.3 (max) is stronger in agents & tools, coding, human preference, maths.
- GPT-5.4 Pro is stronger in knowledge, reasoning, instruction following, multimodal.
- GLM 5.3 (max) is 31× cheaper ($2.15 vs $67.50 per 1M blended).
- GLM 5.3 (max) streams 66.1× faster (66 vs 1 tokens per second).
| Metric | GLM 5.3 (max) | GPT-5.4 Pro |
|---|---|---|
| BenchLeader Index | 60.0 | 64.3 |
| Agents & tools score | 52.8 | – |
| Coding score | 64.3 | – |
| Human preference score | 68.9 | – |
| Knowledge score | 55.8 | 73.6 |
| Maths score | 60.0 | – |
| Reasoning score | 66.9 | 75.3 |
| Instruction following score | – | 67.3 |
| Multimodal score | – | 69.8 |
| Blended price $/M | $2.15 | $67.50 |
| Output speed | 66 tok/s | 1 tok/s |
| Time to first answer | 33.5 s | 6.3 s |
| Context window | 1M | 1.1M |
| GPQA Diamond | 90.9% | – |
| FrontierMath Tiers 1–3 | 68.8% | – |
| FrontierMath Tier 4 | 29.3% | – |
| OTIS Mock AIME | 91.1% | – |
| SimpleQA Verified | 41.0% | – |
| Humanity's Last Exam | – | 44.3% |
| Terminal-Bench | 41.8% | – |
| SimpleBench | – | 74.1% |
| SciCode | 56.5% | – |
| WeirdML | 75.4% | – |
| ProofBench | 49.0% | – |
| Epoch Capabilities Index | – | 158.9 |
| LMArena Text | 1486 | – |
| LMArena Hard Prompts | 1509 | – |
| LMArena Coding | 1526 | – |
| LMArena WebDev | 1614 | – |
| LMArena Agent | 2.6 | – |
| LiveCodeBench | 80.5% | – |
| MMLU-Pro | 86.8% | – |
| IOI | 68.4% | – |
| LegalBench | 84.8% | – |
| TaxEval | 72.4% | – |
| Terminal-Bench 2.1 (Vals) | 71.5% | – |
| SWE-bench (Vals) | 95.4% | – |
| GPQA Diamond (Vals) | 88.1% | – |
| Vals Index | 57.0 | – |
| MultiChallenge | – | 69.2% |
| VISTA | – | 53.9% |
| MultiNRC | – | 62.3% |
| TutorBench | – | 56.6% |
Data as of 2026-09-13. Best configuration of each model; every score links to its source on the model pages.
GLM 5.3 vs GPT-5.4 Pro: questions
- Is GLM 5.3 better than GPT-5.4 Pro?
- GPT-5.4 Pro leads on quality: 64.3 vs 60.0. The BenchLeader Index combines every independent quality benchmark; GPT-5.4 Pro is ahead overall as of 2026-09-13, but check the category scores for your use.
- Which is cheaper, GLM 5.3 or GPT-5.4 Pro?
- GLM 5.3 is cheaper: $2.15 against $67.50 per million tokens, blended at three input tokens per output token.
- Which is faster, GLM 5.3 or GPT-5.4 Pro?
- GLM 5.3 streams faster: 66 against 1 output tokens per second.
- Which has the larger context window?
- GPT-5.4 Pro accepts more context: 1.1M against 1M tokens.