Gemini 3.1 Pro vs GLM 5.3 Flash
Gemini 3.1 Pro 
GLM 5.3 Flash Verdict
- Gemini 3.1 Pro leads on quality: 64.0 vs 61.1.
- Gemini 3.1 Pro is stronger in agents & tools, composite, instruction following, long context, maths, multimodal, reasoning.
- GLM 5.3 Flash is stronger in coding, human preference, knowledge.
- GLM 5.3 Flash is 38× cheaper ($0.119 vs $4.50 per 1M blended).
| Metric | Gemini 3.1 Pro | GLM 5.3 Flash |
|---|---|---|
| BenchLeader Index | 64.0 | 61.1 |
| Agents & tools score | 63.7 | 52.1 |
| Coding score | 59.9 | 64.3 |
| Composite score | 67.4 | 61.7 |
| Human preference score | 59.9 | 67.6 |
| Instruction following score | 69.6 | – |
| Knowledge score | 66.2 | 67.7 |
| Long context score | 67.6 | 66.6 |
| Maths score | 60.7 | – |
| Multimodal score | 66.2 | 65.5 |
| Reasoning score | 69.8 | 67.5 |
| Blended price $/M | $4.50 | $0.119 |
| Output speed | 108 tok/s | 90 tok/s |
| Time to first answer | 30.5 s | 24.9 s |
| Context window | 1.0M | 1M |
| GPQA Diamond | 94.1% | – |
| FrontierMath Tiers 1–3 | 59.6% | – |
| FrontierMath Tier 4 | 26.8% | – |
| OTIS Mock AIME | 95.6% | – |
| Humanity's Last Exam | 46.4% | – |
| Terminal-Bench | 80.2% | – |
| SimpleBench | 79.6% | – |
| SciCode | 58.9% | 46.1% |
| WeirdML | 72.1% | – |
| APEX-Agents | 33.5% | – |
| ProofBench | 26.0% | – |
| GSO-Bench | 22.6% | – |
| Epoch Capabilities Index | 155 | 151.4 |
| LMArena Text | 1487 | 1474 |
| LMArena Hard Prompts | 1507 | 1496 |
| LMArena Coding | 1521 | 1534 |
| LMArena WebDev | 1447 | 1605 |
| LMArena Vision | 1295 | 1296 |
| LMArena Agent | -5.3 | 2 |
| LiveBench | – | 71.6% |
| LiveBench Reasoning | – | 77.6% |
| LiveBench Coding | – | 79.0% |
| LiveBench Agentic Coding | – | 56.8% |
| LiveBench Mathematics | – | 81.2% |
| LiveBench Data Analysis | – | 76.4% |
| LiveBench Language | – | 77.3% |
| AA Intelligence Index | 30.4 | 41.9 |
| IFBench | 77.1% | – |
| AA-LCR | 82.0% | 80.0% |
| MMMU-Pro | 82.4% | – |
| AA-Omniscience | 31.9 | 7.5 |
| Terminal-Bench Hard | 53.8% | – |
| GPQA Diamond (AA) | 94.1% | 91.2% |
| Humanity's Last Exam (AA) | 47.0% | 39.9% |
| SciCode (AA) | 58.7% | 51.6% |
| τ²-Bench Telecom (AA) | 95.6% | – |
| AIME 2026 | 98.3% | – |
| HMMT February 2026 | 94.7% | – |
| MathArena Apex | 60.9% | – |
| MultiChallenge | 71.4% | – |
| PRBench Finance | 41.9% | – |
| PRBench Legal | 44.0% | – |
| MultiNRC | 64.7% | – |
| HiL-Bench | 35.3% | – |
| TutorBench | 53.0% | – |
| EQ-Bench 4 | 1142 | – |
| ARC-AGI-1 | 98.0% | – |
| ARC-AGI-2 | 77.1% | – |
| ARC-AGI-3 | 0.4% | – |
Data as of 2026-09-10. Best configuration of each model; every score links to its source on the model pages.
Gemini 3.1 Pro vs GLM 5.3 Flash: questions
- Is Gemini 3.1 Pro better than GLM 5.3 Flash?
- Gemini 3.1 Pro leads on quality: 64.0 vs 61.1. The BenchLeader Index combines every independent quality benchmark; Gemini 3.1 Pro is ahead overall as of 2026-09-10, but check the category scores for your use.
- Is Gemini 3.1 Pro better than GLM 5.3 Flash for coding?
- GLM 5.3 Flash scores higher in coding (64 vs 60 on the category index, where 50 is average).
- Is Gemini 3.1 Pro better than GLM 5.3 Flash for agentic tasks?
- Gemini 3.1 Pro scores higher in agentic tasks (64 vs 52 on the category index, where 50 is average).
- Which is cheaper, Gemini 3.1 Pro or GLM 5.3 Flash?
- GLM 5.3 Flash is cheaper: $0.119 against $4.50 per million tokens, blended at three input tokens per output token.
- Which is faster, Gemini 3.1 Pro or GLM 5.3 Flash?
- Gemini 3.1 Pro streams faster: 108 against 90 output tokens per second.
- Which has the larger context window?
- Gemini 3.1 Pro accepts more context: 1.0M against 1M tokens.