Gemini 3.7 Flash vs GPT-6 Astra
Gemini 3.7 Flash was superseded by Gemini 3.8 Flash. The grades below are the last ones measured, so read them as history rather than as this week's board. See the current roster.
GPT-6 Astra leads overall, C to D+. Gemini 3.7 Flash is about 2.3x cheaper per task. By suite, Gemini 3.7 Flash takes real-world issues (C- to D) and GPT-6 Astra takes spec planning (C+ to D-). Take Gemini 3.7 Flash anyway when you want the side that is cheaper per task and ahead 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: GPT-6 Astra vs Gemini 3.7 Flash
GPT-6 Astra leads overall, C to D+. By suite: Gemini 3.7 Flash takes real-world issues, C- to D (60% vs 43% capability); GPT-6 Astra takes spec planning, C+ to D- (74% vs 40% capability); GPT-6 Astra takes vibe coding, C+ to C- (74% vs 61% 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. GPT-6 Astra used 22% of ChatGPT Plus's weekly limit per pass, $0.053 per task at the listed price; at the ~$100 tier the board defaults to that is an estimated ~4.4% of ChatGPT Pro 5x's weekly limit (est, about $0.053 per task). Per task, Gemini 3.7 Flash is about 2.3x cheaper ($0.023 vs $0.053). GPT-6 Astra is faster on real-world issues: a median task takes 2m 13s against 2m 38s. Both finished every task on it. Reasons to pick Gemini 3.7 Flash anyway: it is cheaper per task ($0.023 vs $0.053) and it leads on real-world issues (C- to D).
Changed since W35: 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; GPT-6 Astra has one graded week under this version (W40).
| Dimension | Gemini 3.7 Flash | GPT-6 Astra | Advantage |
|---|---|---|---|
| Capability | 60% | 43% | +17% (Gemini 3.7 Flash leads) |
| Median task time | 2m 38s | 2m 13s | 25s faster (GPT-6 Astra leads) |
| Approx. task cost | $0.025 / task | $0.052 / task | $0.027 / task lower (Gemini 3.7 Flash 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. GPT-6 Astra: 17.0% of ChatGPT Plus (112.0% / 5h, 17.0% / 1w) per run. Its weekly limit holds about 6 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 | GPT-6 Astra | Advantage |
|---|---|---|---|
| Capability | 40% | 74% | +35% (GPT-6 Astra leads) |
| Median task time | 1m 38s | 3m 5s | 1m 27s 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. GPT-6 Astra: 5.0% of ChatGPT Plus (27.0% / 5h, 5.0% / 1w) per run. Its weekly limit holds about 6 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 | GPT-6 Astra | Advantage |
|---|---|---|---|
| Capability | 61% | 74% | +13% (GPT-6 Astra leads) |
| Median task time | 3m 37s | 2m 40s | 58s faster (GPT-6 Astra leads) |
| Approx. task cost | $0.028 / task | $0.046 / task | $0.018 / task lower (Gemini 3.7 Flash 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. GPT-6 Astra: 1.0% of ChatGPT Plus (7.2% / 5h, 1.0% / 1w) per good solve. Its weekly limit holds about 6 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 GPT-6 Astra?
Gemini 3.7 Flash clears higher: tier 4 of 5 versus tier 2 for GPT-6 Astra 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 GPT-6 Astra?
Gemini 3.7 Flash used 9.4% of Google AI Pro's weekly limit per pass, $0.023 per task at the listed price. GPT-6 Astra used 22% of ChatGPT Plus's weekly limit per pass, $0.053 per task at the listed price; at the ~$100 tier the board defaults to that is an estimated ~4.4% of ChatGPT Pro 5x's weekly limit (est, about $0.053 per task). Per task, Gemini 3.7 Flash is about 2.3x cheaper ($0.023 vs $0.053).