Gemini 3.8 Flash vs GPT-5.6 Sol
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 3.8 Flash | GPT-5.6 Sol | Advantage |
|---|---|---|---|
| Capability | 53% | 60% | +7% (GPT-5.6 Sol leads) |
| Median task time | 4m 14s | 2m 50s | 1m 24s faster (GPT-5.6 Sol leads) |
| Approx. task cost | $0.063 / task | $0.039 / task | $0.024 / task lower (GPT-5.6 Sol leads) |
Gemini 3.8 Flash: 20.4% of Google AI Pro (122.4% / 5h, 20.4% / 1w) per run. Its weekly limit holds 6 of the week's 33.6 5h windows. GPT-5.6 Sol: 12.6% of ChatGPT Plus (75.5% / 5h, 12.6% / 1w) per run. Its weekly limit holds about 6 of the week's 33.6 5h windows. Each figure is a share of that agent's own plan, so there is no delta to draw.
| Dimension | Gemini 3.8 Flash | GPT-5.6 Sol | Advantage |
|---|---|---|---|
| Capability | 39% | 74% | +35% (GPT-5.6 Sol leads) |
| Median task time | 2m 39s | 4m 46s | 2m 7s faster (Gemini 3.8 Flash leads) |
| Approx. task cost | $0.022 / task | $0.033 / task | $0.010 / task lower (Gemini 3.8 Flash leads) |
Gemini 3.8 Flash: 1.9% of Google AI Pro (11.7% / 5h, 1.9% / 1w) per run. Its weekly limit holds 6 of the week's 33.6 5h windows. GPT-5.6 Sol: 2.9% of ChatGPT Plus (17.1% / 5h, 2.9% / 1w) per run. Its weekly limit holds about 6 of the week's 33.6 5h windows. Each figure is a share of that agent's own plan, so there is no delta to draw.
| Dimension | Gemini 3.8 Flash | GPT-5.6 Sol | Advantage |
|---|---|---|---|
| Capability | 52% | 56% | +4% (GPT-5.6 Sol leads) |
| Median task time | 7m 7s | 6m 10s | 57s faster (GPT-5.6 Sol leads) |
| Approx. task cost | $0.046 / task | $0.032 / task | $0.014 / task lower (GPT-5.6 Sol leads) |
Gemini 3.8 Flash: 1.0% of Google AI Pro (6.0% / 5h, 1.0% / 1w) per good solve. Its weekly limit holds 6 of the week's 33.6 5h windows. GPT-5.6 Sol: 0.7% of ChatGPT Plus (4.1% / 5h, 0.7% / 1w) per good solve. Its weekly limit holds about 6 of the week's 33.6 5h windows. 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 3.8 Flash or GPT-5.6 Sol?
GPT-5.6 Sol clears higher: tier 4 of 5 versus tier 3 for Gemini 3.8 Flash on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-09-02.