Gemini 3.8 Flash vs Grok 4.5
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 | Grok 4.5 | Advantage |
|---|---|---|---|
| Capability | 53% | 60% | +7% (Grok 4.5 leads) |
| Median task time | 4m 14s | 3m 9s | 1m 5s faster (Grok 4.5 leads) |
| Approx. task cost | $0.063 / task | $0.032 / task | $0.031 / task lower (Grok 4.5 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. Grok 4.5: 6.9% of SuperGrok (6.9% / 1w) per run. Each figure is a share of that agent's own plan, so there is no delta to draw.
Only Gemini 3.8 Flash has run this suite, so there is no head-to-head yet.
| Dimension | Gemini 3.8 Flash | Grok 4.5 | Advantage |
|---|---|---|---|
| Capability | 52% | 59% | +6% (Grok 4.5 leads) |
| Median task time | 7m 7s | 3m 40s | 3m 27s faster (Grok 4.5 leads) |
| Approx. task cost | $0.046 / task | $0.031 / task | $0.015 / task lower (Grok 4.5 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. Grok 4.5: 0.4% of SuperGrok (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 3.8 Flash or Grok 4.5?
Grok 4.5 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.