Gemini 3 Flash vs GPT-5.6 Sol
Gemini 3 Flash 
GPT-5.6 Sol Verdict
- GPT-5.6 Sol (high) leads on quality: 68.2 vs 61.6.
- Gemini 3 Flash (thinking) is stronger in instruction following.
- GPT-5.6 Sol (high) is stronger in agents & tools, composite, knowledge, long context, multimodal, coding, reasoning.
- Gemini 3 Flash (thinking) is 7.1× cheaper ($1.13 vs $8.00 per 1M blended).
- Gemini 3 Flash (thinking) streams 3.1× faster (180 vs 59 tokens per second).
| Metric | Gemini 3 Flash (thinking) | GPT-5.6 Sol (high) |
|---|---|---|
| BenchLeader Index | 61.6 | 68.2 |
| Agents & tools score | 67.4 | 87.9 |
| Composite score | 62.3 | 82.7 |
| Instruction following score | 75.4 | 67.8 |
| Knowledge score | 69.0 | 73.8 |
| Long context score | 65.5 | 67.4 |
| Multimodal score | 64.4 | 66.4 |
| Coding score | – | 72.4 |
| Reasoning score | – | 63.3 |
| Blended price $/M | $1.13 | $8.00 |
| Output speed | 180 tok/s | 59 tok/s |
| Time to first answer | 6.1 s | 31.0 s |
| Context window | 1M | 1M |
| SciCode | – | 56.9% |
| WeirdML | – | 88.8% |
| AA Intelligence Index | 26.3 | 42.5 |
| IFBench | 78.0% | 69.2% |
| AA-LCR | 78.0% | 81.7% |
| MMMU-Pro | 79.9% | 81.8% |
| AA-Omniscience | 10.1 | 20.4 |
| Terminal-Bench Hard | 38.6% | 62.1% |
| GPQA Diamond (AA) | 89.8% | 92.8% |
| Humanity's Last Exam (AA) | 36.6% | 46.0% |
| SciCode (AA) | – | 57.8% |
| τ²-Bench Telecom (AA) | 80.4% | 83.3% |
| EnigmaEval | – | 37.1% |
| ARC-AGI-1 | – | 97.0% |
| ARC-AGI-2 | – | 85.4% |
| ARC-AGI-3 | – | 2.2% |
Data as of 2026-09-10. Best configuration of each model; every score links to its source on the model pages.
Gemini 3 Flash vs GPT-5.6 Sol: questions
- Is Gemini 3 Flash better than GPT-5.6 Sol?
- GPT-5.6 Sol (high) leads on quality: 68.2 vs 61.6. The BenchLeader Index combines every independent quality benchmark; GPT-5.6 Sol (high) is ahead overall as of 2026-09-10, but check the category scores for your use.
- Is Gemini 3 Flash better than GPT-5.6 Sol for agentic tasks?
- GPT-5.6 Sol scores higher in agentic tasks (88 vs 67 on the category index, where 50 is average).
- Which is cheaper, Gemini 3 Flash or GPT-5.6 Sol?
- Gemini 3 Flash is cheaper: $1.13 against $8.00 per million tokens, blended at three input tokens per output token.
- Which is faster, Gemini 3 Flash or GPT-5.6 Sol?
- Gemini 3 Flash streams faster: 180 against 59 output tokens per second.
- Which has the larger context window?
- Both accept 1M tokens of context.