gemini-3.1-pro vs gemini-3.6-flash
Each agent graded on the same private suites, running headless through its own tools. Advantages are oriented so a win is a win, whichever way the metric runs.
| Dimension | gemini-3.1-pro | gemini-3.6-flash | Advantage |
|---|---|---|---|
| Capability | 53% | 60% | +7% (gemini-3.6-flash leads) |
| Median task time | 3m 25s | 2m 17s | 1m 8s faster (gemini-3.6-flash leads) |
| Approx. task cost | $0.026 / task | $0.039 / task | $0.013 / task lower (gemini-3.1-pro leads) |
gemini-3.1-pro: 8.5% of Google AI Pro (51.2% / 5h, 8.5% / 1w) per run. gemini-3.6-flash: 12.6% of Google AI Pro (about 72.1% / 5h, 12.6% / 1w) per run. Each figure is a share of that agent's own plan, so there is no delta to draw.
Only gemini-3.1-pro has run this suite, so there is no head-to-head yet.
| Dimension | gemini-3.1-pro | gemini-3.6-flash | Advantage |
|---|---|---|---|
| Capability | 23% | 72% | +49% (gemini-3.6-flash leads) |
| Median task time | 4m 39s | 1m 54s | 2m 45s faster (gemini-3.6-flash leads) |
| Approx. task cost | $0.039 / task | $0.038 / task | $0.002 / task lower (gemini-3.6-flash leads) |
gemini-3.1-pro: 0.9% of Google AI Pro (5.1% / 5h, 0.9% / 1w) per good solve. gemini-3.6-flash: 0.8% of Google AI Pro (4.9% / 5h, 0.8% / 1w) per good solve. Each figure is a share of that agent's own plan, so there is no delta to draw.
Grades and deltas are comparable only within a suite version. See methodology.
Frequently asked questions
Which is better for coding, gemini-3.1-pro or gemini-3.6-flash?
gemini-3.6-flash clears higher: tier 4 of 5 versus tier 3 for gemini-3.1-pro on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-08-17.