Gemini 3.8 Flash vs Kimi K3 256K
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 | Kimi K3 256K | Advantage |
|---|---|---|---|
| Capability | 53% | 57% | +3% (Kimi K3 256K leads) |
| Median task time | 4m 14s | 3m 34s | 40s faster (Kimi K3 256K leads) |
| Approx. task cost | $0.063 / task | $0.025 / task | $0.038 / task lower (Kimi K3 256K 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. Kimi K3 256K: 140.0% of Kimi Allegretto (140.0% / 5h, 28.0% / 1w) per run. Its weekly limit holds about 5 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 | Kimi K3 256K | Advantage |
|---|---|---|---|
| Capability | 39% | 41% | +2% (Kimi K3 256K leads) |
| Median task time | 2m 39s | 6m 34s | 3m 55s faster (Gemini 3.8 Flash leads) |
| Approx. task cost | $0.022 / task | $0.031 / task | $0.008 / 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. Kimi K3 256K: 46.0% of Kimi Allegretto (46.0% / 5h, 9.0% / 1w) per run. Its weekly limit holds about 5 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 | Kimi K3 256K | Advantage |
|---|---|---|---|
| Capability | 52% | 55% | +3% (Kimi K3 256K leads) |
| Median task time | 7m 7s | 6m 31s | 36s faster (Kimi K3 256K leads) |
| Approx. task cost | $0.046 / task | $0.029 / task | $0.016 / task lower (Kimi K3 256K 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. Kimi K3 256K: 11.0% of Kimi Allegretto (11.0% / 5h, 2.4% / 1w) per good solve. Its weekly limit holds about 5 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 Kimi K3 256K?
Gemini 3.8 Flash clears higher: tier 3 of 5 versus tier 2 for Kimi K3 256K on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-09-02.