Gemini 3.6 Flash vs GPT-5.6 Sol
Gemini 3.6 Flash was superseded by Gemini 3.8 Flash. GPT-5.6 Sol was superseded by GPT-6.1 Sol. The grades below are the last ones measured, so read them as history rather than as this week's board. See the current roster.
Gemini 3.6 Flash leads overall, C to C-. The two cost about the same per task. By suite, real-world issues is even at C- and Gemini 3.6 Flash takes vibe coding (C+ to D+). The data gives no reason to pick GPT-5.6 Sol over Gemini 3.6 Flash this week.Measured
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.
Verdict: GPT-5.6 Sol vs Gemini 3.6 Flash
Gemini 3.6 Flash leads overall, C to C-. By suite: real-world issues is even at C- (60% vs 60% capability); Gemini 3.6 Flash takes vibe coding, C+ to D+ (72% vs 51% capability). Only GPT-5.6 Sol has run spec planning. Gemini 3.6 Flash used 12.6% of Google AI Pro's weekly limit per pass, $0.039 per task at the listed price. GPT-5.6 Sol used 3% of ChatGPT Pro 5x's weekly limit per pass, $0.036 per task at the listed price. Per task the two cost about the same ($0.039 vs $0.036). Gemini 3.6 Flash is faster on real-world issues: a median task takes 2m 17s against 3m 13s. Both finished every task on it. The data gives no reason to pick GPT-5.6 Sol over Gemini 3.6 Flash this week.
Changed since the previous graded week: Gemini 3.6 Flash unchanged; GPT-5.6 Sol: vibe coding C- to D+.
| Dimension | Gemini 3.6 Flash | GPT-5.6 Sol | Advantage |
|---|---|---|---|
| Capability | 60% | 60% | Even |
| Median task time | 2m 17s | 3m 13s | 56s faster (Gemini 3.6 Flash leads) |
| Approx. task cost | $0.039 / task | $0.031 / task | $0.008 / task lower (GPT-5.6 Sol leads) |
Gemini 3.6 Flash: 12.6% of Google AI Pro (about 72.1% / 5h, 12.6% / 1w) per run. Its weekly limit holds 6 of the week's 33.6 5h windows. GPT-5.6 Sol: 2.0% of ChatGPT Pro 5x (2.0% / 1w) per run. Each figure is a share of that agent's own plan, so there is no delta to draw.
Only GPT-5.6 Sol has run this suite, so there is no head-to-head yet.
| Dimension | Gemini 3.6 Flash | GPT-5.6 Sol | Advantage |
|---|---|---|---|
| Capability | 72% | 51% | +21% (Gemini 3.6 Flash leads) |
| Median task time | 1m 54s | 3m 56s | 2m 2s faster (Gemini 3.6 Flash leads) |
| Approx. task cost | $0.038 / task | $0.092 / task | $0.054 / task lower (Gemini 3.6 Flash leads) |
Gemini 3.6 Flash: 0.8% of Google AI Pro (4.9% / 5h, 0.8% / 1w) per good solve. Its weekly limit holds 6 of the week's 33.6 5h windows. GPT-5.6 Sol: 0.4% of ChatGPT Pro 5x (0.4% / 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 3.6 Flash or GPT-5.6 Sol?
They are even on our ladder: both clear tier 4 of 5 at 60% capability on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-08-10.
Which is cheaper per task, Gemini 3.6 Flash or GPT-5.6 Sol?
Gemini 3.6 Flash used 12.6% of Google AI Pro's weekly limit per pass, $0.039 per task at the listed price. GPT-5.6 Sol used 3% of ChatGPT Pro 5x's weekly limit per pass, $0.036 per task at the listed price. Per task the two cost about the same ($0.039 vs $0.036).