Gemini 3.7 Flash vs Claude Sonnet 5
Gemini 3.7 Flash was superseded by Gemini 3.8 Flash. Claude Sonnet 5 is no longer on the leaderboard. 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 3.7 Flash leads overall, D+ to D. The two cost about the same per task. By suite, Gemini 3.7 Flash takes real-world issues (C- to D+) and Claude Sonnet 5 takes spec planning (D to D-). Take Claude Sonnet 5 anyway when you want the side that is ahead on spec planning.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: Claude Sonnet 5 vs Gemini 3.7 Flash
Gemini 3.7 Flash leads overall, D+ to D. By suite: Gemini 3.7 Flash takes real-world issues, C- to D+ (60% vs 53% capability); Claude Sonnet 5 takes spec planning, D to D- (44% vs 40% capability); Gemini 3.7 Flash takes vibe coding, C- to F (61% vs 31% capability). Gemini 3.7 Flash used 9.4% of Google AI Pro's weekly limit per pass, $0.023 per task at the listed price. Claude Sonnet 5 used 2% of Claude Max 5x's weekly limit per pass, $0.024 per task at the listed price. Per task the two cost about the same ($0.023 vs $0.024). Gemini 3.7 Flash is faster on real-world issues: a median task takes 2m 38s against 3m 35s. Both finished every task on it. Reasons to pick Claude Sonnet 5 anyway: it leads on spec planning (D to D-).
Changed since the previous graded week: Gemini 3.7 Flash: real-world issues usage 8.5% to 8.2% of the weekly limit, spec planning D to D-, spec planning usage 1.3% to 1.2% of the weekly limit; Claude Sonnet 5: vibe coding D+ to F.
| Dimension | Gemini 3.7 Flash | Claude Sonnet 5 | Advantage |
|---|---|---|---|
| Capability | 60% | 53% | +7% (Gemini 3.7 Flash leads) |
| Median task time | 2m 38s | 3m 35s | 57s faster (Gemini 3.7 Flash leads) |
| Approx. task cost | $0.025 / task | $0.015 / task | $0.010 / task lower (Claude Sonnet 5 leads) |
Gemini 3.7 Flash: 8.2% of Google AI Pro (49.1% / 5h, 8.2% / 1w) per run. Its weekly limit holds 6 of the week's 33.6 5h windows. Claude Sonnet 5: 12.0% of Claude Max 5x (12.0% / 5h, 1.0% / 1w) per run. Its weekly limit holds about 13.8 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 3.7 Flash | Claude Sonnet 5 | Advantage |
|---|---|---|---|
| Capability | 40% | 44% | +4% (Claude Sonnet 5 leads) |
| Median task time | 1m 38s | 5m 12s | 3m 34s faster (Gemini 3.7 Flash leads) |
| Approx. task cost | $0.014 / task | $0.057 / task | $0.044 / task lower (Gemini 3.7 Flash leads) |
Gemini 3.7 Flash: 1.2% of Google AI Pro (7.1% / 5h, 1.2% / 1w) per run. Its weekly limit holds 6 of the week's 33.6 5h windows. Claude Sonnet 5: 5.0% of Claude Max 5x (5.0% / 5h, 1.0% / 1w) per run. Its weekly limit holds about 13.8 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 3.7 Flash | Claude Sonnet 5 | Advantage |
|---|---|---|---|
| Capability | 61% | 31% | +30% (Gemini 3.7 Flash leads) |
| Median task time | 3m 37s | 4m 31s | 53s faster (Gemini 3.7 Flash leads) |
| Approx. task cost | $0.028 / task | $0.007 / task | $0.021 / task lower (Claude Sonnet 5 leads) |
Gemini 3.7 Flash: 0.6% of Google AI Pro (3.6% / 5h, 0.6% / 1w) per good solve. Its weekly limit holds 6 of the week's 33.6 5h windows. Claude Sonnet 5: 1.0% of Claude Max 5x (1.0% / 5h) per good solve. Its weekly limit holds about 13.8 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 3.7 Flash or Claude Sonnet 5?
Gemini 3.7 Flash clears higher: tier 4 of 5 versus tier 3 for Claude Sonnet 5 on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-08-30.
Which is cheaper per task, Gemini 3.7 Flash or Claude Sonnet 5?
Gemini 3.7 Flash used 9.4% of Google AI Pro's weekly limit per pass, $0.023 per task at the listed price. Claude Sonnet 5 used 2% of Claude Max 5x's weekly limit per pass, $0.024 per task at the listed price. Per task the two cost about the same ($0.023 vs $0.024).