Gemini 3.6 Flash vs GPT-5 Pro
Gemini 3.6 Flash 
GPT-5 Pro Verdict
- Gemini 3.6 Flash and GPT-5 Pro are level on quality (60.8 vs 60.8).
- Gemini 3.6 Flash is stronger in coding, composite, knowledge, long context, maths, multimodal.
- GPT-5 Pro is stronger in reasoning.
- Gemini 3.6 Flash is 28× cheaper ($1.50 vs $41.25 per 1M blended).
| Metric | Gemini 3.6 Flash | GPT-5 Pro |
|---|---|---|
| BenchLeader Index | 60.8 | 60.8 |
| Coding score | 49.8 | – |
| Composite score | 72.4 | – |
| Knowledge score | 74.7 | 68.0 |
| Long context score | 66.6 | – |
| Maths score | 54.8 | – |
| Multimodal score | 67.8 | 67.4 |
| Reasoning score | – | 57.6 |
| Blended price $/M | $1.50 | $41.25 |
| Output speed | 194 tok/s | – |
| Time to first answer | 16.8 s | – |
| Context window | 1.0M | 400k |
| Humanity's Last Exam | – | 31.6% |
| SimpleBench | – | 61.6% |
| FrontierCode | 34.4% | – |
| ProofBench | 36.0% | – |
| Epoch Capabilities Index | 154.3 | 150.3 |
| AA Intelligence Index | 34.3 | – |
| AA-LCR | 80.0% | – |
| MMMU-Pro | 83.2% | – |
| AA-Omniscience | 22.1 | – |
| GPQA Diamond (AA) | 92.8% | – |
| Humanity's Last Exam (AA) | 40.8% | – |
| SciCode (AA) | 53.4% | – |
| AIME 2026 | 96.7% | – |
| HMMT February 2026 | 89.4% | – |
| MathArena Apex | 26.0% | – |
| PRBench Finance | – | 51.1% |
| PRBench Legal | – | 49.9% |
| VISTA | – | 52.4% |
| MultiNRC | – | 65.2% |
| Kagi LLM Benchmark | – | 76.8% |
| ARC-AGI-1 | – | 70.2% |
| ARC-AGI-2 | – | 18.3% |
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 GPT-5 Pro: questions
- Is Gemini 3.6 Flash better than GPT-5 Pro?
- Gemini 3.6 Flash and GPT-5 Pro are level on quality (60.8 vs 60.8). The BenchLeader Index combines every independent quality benchmark; GPT-5 Pro is ahead overall as of 2026-09-10, but check the category scores for your use.
- Which is cheaper, Gemini 3.6 Flash or GPT-5 Pro?
- Gemini 3.6 Flash is cheaper: $1.50 against $41.25 per million tokens, blended at three input tokens per output token.
- Which has the larger context window?
- Gemini 3.6 Flash accepts more context: 1.0M against 400k tokens.