Gemini 3.6 Flash vs GPT-6 Astra
Gemini 3.6 Flash was superseded by Gemini 3.8 Flash.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.
Both grade C overall. Gemini 3.6 Flash is about 1.4x cheaper per task. By suite, Gemini 3.6 Flash takes real-world issues (C- to D) and vibe coding is even at C+. Both agents run the same private suite cut headless through their own tools, each on its own subscription.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 3.6 Flash
Both grade C overall. By suite: Gemini 3.6 Flash takes real-world issues, C- to D (60% vs 43% capability); vibe coding is even at C+ (72% vs 74% capability). Only GPT-6 Astra has run spec planning. Gemini 3.6 Flash used 12.6% of Google AI Pro's weekly limit per pass, $0.039 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 3.6 Flash is about 1.4x cheaper ($0.039 vs $0.053). GPT-6 Astra is faster on real-world issues: a median task takes 2m 13s against 2m 17s. Both finished every task on it.
Changed since W32: Gemini 3.6 Flash unchanged; GPT-6 Astra has one graded week under this version (W40).
| Dimension | Gemini 3.6 Flash | GPT-6 Astra | Advantage |
|---|---|---|---|
| Capability | 60% | 43% | +17% (Gemini 3.6 Flash leads) |
| Median task time | 2m 17s | 2m 13s | 3s faster (GPT-6 Astra leads) |
| Approx. task cost | $0.039 / task | $0.052 / task | $0.013 / task lower (Gemini 3.6 Flash leads) |
Gemini 3.6 Flash: 12.6% of Google AI Pro (about 72.1% / 5h, 12.6% / 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.
Only GPT-6 Astra has run this suite, so there is no head-to-head yet.
| Dimension | Gemini 3.6 Flash | GPT-6 Astra | Advantage |
|---|---|---|---|
| Capability | 72% | 74% | +3% (GPT-6 Astra leads) |
| Median task time | 1m 54s | 2m 40s | 46s faster (Gemini 3.6 Flash leads) |
| Approx. task cost | $0.038 / task | $0.046 / task | $0.008 / task lower (Gemini 3.6 Flash leads) |
Gemini 3.6 Flash: 0.8% of Google AI Pro (4.9% / 5h, 0.8% / 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 3.6 Flash or GPT-6 Astra?
Gemini 3.6 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 2026-08-10.
Which is cheaper per task, Gemini 3.6 Flash or GPT-6 Astra?
Gemini 3.6 Flash used 12.6% of Google AI Pro's weekly limit per pass, $0.039 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 3.6 Flash is about 1.4x cheaper ($0.039 vs $0.053).