Gemini 3.8 Flash vs GPT-6 Sol
Gemini 3.8 Flash 
GPT-6 Sol Verdict
- GPT-6 Sol (max) leads on quality: 67.7 vs 64.3.
- Gemini 3.8 Flash (medium) is stronger in agents & tools, coding, knowledge, long context, multimodal.
- GPT-6 Sol (max) is stronger in composite, reasoning.
- Gemini 3.8 Flash (medium) is 2.7× cheaper ($1.50 vs $4.00 per 1M blended).
- GPT-6 Sol (max) streams 1.6× faster (126 vs 77 tokens per second).
| Metric | Gemini 3.8 Flash (medium) | GPT-6 Sol (max) |
|---|---|---|
| BenchLeader Index | 64.3 | 67.7 |
| Agents & tools score | 74.8 | – |
| Coding score | 60.1 | – |
| Composite score | 76.9 | 86.2 |
| Knowledge score | 76.1 | 75.4 |
| Long context score | 67.9 | 67.7 |
| Multimodal score | 68.1 | 67.1 |
| Reasoning score | 63.4 | 95.0 |
| Blended price $/M | $1.50 | $4.00 |
| Output speed | 77 tok/s | 126 tok/s |
| Time to first answer | 2.4 s | 107.2 s |
| Context window | 1.0M | 1.1M |
| SciCode | 54.4% | – |
| FrontierCode | 41.2% | – |
| AA Intelligence Index | 39.8 | 47.5 |
| AA-LCR | 84.0% | 83.7% |
| MMMU-Pro | 84.2% | 83.3% |
| AA-Omniscience | 28.6 | 27.1 |
| GPQA Diamond (AA) | 93.5% | – |
| Humanity's Last Exam (AA) | 42.1% | 47.9% |
| SciCode (AA) | 55.1% | 57.6% |
| CritPt | 12.3% | 30.9% |
| GDPval (AA) | 45.4% | 49.4% |
| τ²-Bench Banking (AA) | 45.8% | – |
| DeepSWE | 71.0% | – |
| LMCA | 52.9% | – |
| DTBench | 94.9% | – |
| CursorBench | 37.3% | – |
| GDP.pdf | 23.4% | – |
| Terminal-Bench 4.0 (AA) | 19.7% | 43.9% |
| Terminal-Bench 2.1 (AA) | 83.9% | – |
| AutomationBench | – | 61.6% |
| GDP.pdf | – | 24.8% |
| MLCR | – | 16.1% |
| AA-Omniscience: accuracy | 53.0% | 54.5% |
| AA-Omniscience: non-hallucination | 48.1% | 39.9% |
| AA-Briefcase | – | 1483 |
Data as of 2026-09-23. Best configuration of each model; every score links to its source on the model pages.
Gemini 3.8 Flash vs GPT-6 Sol: questions
- Is Gemini 3.8 Flash better than GPT-6 Sol?
- GPT-6 Sol (max) leads on quality: 67.7 vs 64.3. The BenchLeader Index combines every independent quality benchmark; GPT-6 Sol (max) is ahead overall as of 2026-09-23, but check the category scores for your use.
- Which is cheaper, Gemini 3.8 Flash or GPT-6 Sol?
- Gemini 3.8 Flash is cheaper: $1.50 against $4.00 per million tokens, blended at three input tokens per output token.
- Which is faster, Gemini 3.8 Flash or GPT-6 Sol?
- GPT-6 Sol streams faster: 126 against 77 output tokens per second.
- Which has the larger context window?
- GPT-6 Sol accepts more context: 1.1M against 1.0M tokens.