Gemini 3.6 Flash vs Grok 4.5
Gemini 3.6 Flash 
Grok 4.5 Verdict
- Grok 4.5 leads on quality: 63.5 vs 60.8.
- Gemini 3.6 Flash is stronger in composite, long context, maths, multimodal.
- Grok 4.5 is stronger in coding, knowledge, agents & tools, human preference, reasoning.
- Gemini 3.6 Flash is 2.0× cheaper ($1.50 vs $3.00 per 1M blended).
- Gemini 3.6 Flash streams 3.7× faster (194 vs 52 tokens per second).
| Metric | Gemini 3.6 Flash | Grok 4.5 |
|---|---|---|
| BenchLeader Index | 60.8 | 63.5 |
| Coding score | 49.8 | 59.8 |
| Composite score | 72.4 | 66.2 |
| Knowledge score | 74.7 | 76.2 |
| Long context score | 66.6 | 66.2 |
| Maths score | 54.8 | – |
| Multimodal score | 67.8 | 64.9 |
| Agents & tools score | – | 58.6 |
| Human preference score | – | 67.2 |
| Reasoning score | – | 69.2 |
| Blended price $/M | $1.50 | $3.00 |
| Output speed | 194 tok/s | 52 tok/s |
| Time to first answer | 16.8 s | 13.6 s |
| Context window | 1.0M | 500k |
| SimpleBench | – | 70.0% |
| WeirdML | – | 46.4% |
| APEX-Agents | – | 34.2% |
| FrontierCode | 34.4% | 42.4% |
| ProofBench | 36.0% | – |
| Epoch Capabilities Index | 154.3 | 153.9 |
| LMArena Text | – | 1471 |
| LMArena Hard Prompts | – | 1495 |
| LMArena Coding | – | 1523 |
| LMArena WebDev | – | 1556 |
| LMArena Vision | – | 1291 |
| LMArena Agent | – | 3.9 |
| LiveBench | – | 75.8% |
| LiveBench Reasoning | – | 87.2% |
| LiveBench Coding | – | 68.6% |
| LiveBench Agentic Coding | – | 56.5% |
| LiveBench Mathematics | – | 90.8% |
| LiveBench Data Analysis | – | 73.0% |
| LiveBench Language | – | 82.8% |
| AA Intelligence Index | 34.3 | 39.1 |
| AA-LCR | 80.0% | 79.3% |
| MMMU-Pro | 83.2% | 80.4% |
| AA-Omniscience | 22.1 | 25.3 |
| GPQA Diamond (AA) | 92.8% | 93.1% |
| Humanity's Last Exam (AA) | 40.8% | 42.7% |
| SciCode (AA) | 53.4% | 55.0% |
| AIME 2026 | 96.7% | – |
| HMMT February 2026 | 89.4% | – |
| MathArena Apex | 26.0% | – |
| Kagi LLM Benchmark | – | 83.5% |
Data as of 2026-09-10. Best configuration of each model; every score links to its source on the model pages.
Gemini 3.6 Flash vs Grok 4.5: questions
- Is Gemini 3.6 Flash better than Grok 4.5?
- Grok 4.5 leads on quality: 63.5 vs 60.8. The BenchLeader Index combines every independent quality benchmark; Grok 4.5 is ahead overall as of 2026-09-10, but check the category scores for your use.
- Is Gemini 3.6 Flash better than Grok 4.5 for coding?
- Grok 4.5 scores higher in coding (60 vs 50 on the category index, where 50 is average).
- Which is cheaper, Gemini 3.6 Flash or Grok 4.5?
- Gemini 3.6 Flash is cheaper: $1.50 against $3.00 per million tokens, blended at three input tokens per output token.
- Which is faster, Gemini 3.6 Flash or Grok 4.5?
- Gemini 3.6 Flash streams faster: 194 against 52 output tokens per second.
- Which has the larger context window?
- Gemini 3.6 Flash accepts more context: 1.0M against 500k tokens.