Gemini 3.8 Flash vs Grok 4.7
Grok 4.7 leads overall, C- to D. Gemini 3.8 Flash is about 3.0x cheaper per task. By suite, Grok 4.7 takes real-world issues (D to F) and spec planning (C to D+). Take Gemini 3.8 Flash anyway when you want the side that is cheaper per task and faster on real-world issues.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: Grok 4.7 vs Gemini 3.8 Flash
Grok 4.7 leads overall, C- to D. By suite: Grok 4.7 takes real-world issues, D to F (47% vs 28% capability); Grok 4.7 takes spec planning, C to D+ (68% vs 50% capability); Grok 4.7 takes vibe coding, C to D+ (64% vs 52% capability). Gemini 3.8 Flash used 19.9% of Google AI Pro's weekly limit per pass, $0.048 per task at the listed price. Grok 4.7 used 12% of SuperGrok Plus's weekly limit per pass, $0.145 per task at the listed price. Per task, Gemini 3.8 Flash is about 3.0x cheaper ($0.048 vs $0.145). Gemini 3.8 Flash is faster on real-world issues: a median task takes 3m 11s against 6m 57s. Both finished every task on it. Reasons to pick Gemini 3.8 Flash anyway: it is cheaper per task ($0.048 vs $0.145) and it is faster on real-world issues (3m 11s vs 6m 57s median).
Changed since W38: Gemini 3.8 Flash: real-world issues D+ to F, real-world issues usage 18.4% to 18.0% of the weekly limit, spec planning D to D+, spec planning usage 1.7% to 2.0% of the weekly limit, vibe coding C- to D+, vibe coding usage 1.0% to 1.2% of the weekly limit; Grok 4.7 has one graded week under this version (W39).
| Dimension | Gemini 3.8 Flash | Grok 4.7 | Advantage |
|---|---|---|---|
| Capability | 28% | 47% | +18% (Grok 4.7 leads) |
| Median task time | 3m 11s | 6m 57s | 3m 46s faster (Gemini 3.8 Flash leads) |
| Approx. task cost | $0.055 / task | $0.077 / task | $0.022 / task lower (Gemini 3.8 Flash leads) |
Gemini 3.8 Flash: 18.0% of Google AI Pro (107.8% / 5h, 18.0% / 1w) per run. Its weekly limit holds 6 of the week's 33.6 5h windows. Grok 4.7: 5.0% of SuperGrok Plus (5.0% / 1w) per run. Each figure is a share of that agent's own plan, so there is no delta to draw.
| Dimension | Gemini 3.8 Flash | Grok 4.7 | Advantage |
|---|---|---|---|
| Capability | 50% | 68% | +18% (Grok 4.7 leads) |
| Median task time | 2m 23s | 37m 24s | 35m 1s faster (Gemini 3.8 Flash leads) |
| Approx. task cost | $0.023 / task | $0.402 / task | $0.380 / task lower (Gemini 3.8 Flash leads) |
Gemini 3.8 Flash: 2.0% of Google AI Pro (11.7% / 5h, 2.0% / 1w) per run. Its weekly limit holds 6 of the week's 33.6 5h windows. Grok 4.7: 7.0% of SuperGrok Plus (7.0% / 1w) per run. Each figure is a share of that agent's own plan, so there is no delta to draw.
| Dimension | Gemini 3.8 Flash | Grok 4.7 | Advantage |
|---|---|---|---|
| Capability | 52% | 64% | +12% (Grok 4.7 leads) |
| Median task time | 6m 42s | 11m 10s | 4m 29s faster (Gemini 3.8 Flash leads) |
| Approx. task cost | $0.054 / task | $0.092 / task | $0.038 / task lower (Gemini 3.8 Flash leads) |
Gemini 3.8 Flash: 1.2% of Google AI Pro (7.0% / 5h, 1.2% / 1w) per good solve. Its weekly limit holds 6 of the week's 33.6 5h windows. Grok 4.7: 0.4% of SuperGrok Plus (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 4.7?
Grok 4.7 clears higher: tier 4 of 5 versus tier 0 for Gemini 3.8 Flash on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-09-20.
Which is cheaper per task, Gemini 3.8 Flash or Grok 4.7?
Gemini 3.8 Flash used 19.9% of Google AI Pro's weekly limit per pass, $0.048 per task at the listed price. Grok 4.7 used 12% of SuperGrok Plus's weekly limit per pass, $0.145 per task at the listed price. Per task, Gemini 3.8 Flash is about 3.0x cheaper ($0.048 vs $0.145).