Gemini 3.7 Flash vs GPT-5.6 Terra
Gemini 3.7 Flash was superseded by Gemini 3.8 Flash.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.
Gemini 3.7 Flash leads overall, D+ to D. GPT-5.6 Terra is about 1.2x cheaper per task. By suite, Gemini 3.7 Flash takes real-world issues (C- to D+) and GPT-5.6 Terra takes spec planning (D+ to D-). Take GPT-5.6 Terra anyway when you want the side that is cheaper per task, faster on real-world issues and 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: GPT-5.6 Terra 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 50% capability); GPT-5.6 Terra takes spec planning, D+ to D- (53% vs 40% capability); Gemini 3.7 Flash takes vibe coding, C- to F (61% vs 34% 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-5.6 Terra used 8% of ChatGPT Plus's weekly limit per pass, $0.019 per task at the listed price; at the ~$100 tier the board defaults to that is an estimated ~1.6% of ChatGPT Pro 5x's weekly limit (est, about $0.019 per task). Per task, GPT-5.6 Terra is about 1.2x cheaper ($0.019 vs $0.023). GPT-5.6 Terra is faster on real-world issues: a median task takes 2m 18s against 2m 38s. Both finished every task on it. Reasons to pick GPT-5.6 Terra anyway: it is cheaper per task ($0.019 vs $0.023), it is faster on real-world issues (2m 18s vs 2m 38s median) and 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; GPT-5.6 Terra: real-world issues D to D+, real-world issues usage 9.2% to 7% of the weekly limit, spec planning C- to D+, spec planning usage 2.0% to 1% of the weekly limit, vibe coding F to D, vibe coding usage 0.5% to 0.6% of the weekly limit.
| Dimension | Gemini 3.7 Flash | GPT-5.6 Terra | Advantage |
|---|---|---|---|
| Capability | 60% | 50% | +10% (Gemini 3.7 Flash leads) |
| Median task time | 2m 38s | 2m 18s | 20s faster (GPT-5.6 Terra leads) |
| Approx. task cost | $0.025 / task | $0.021 / task | $0.004 / task lower (GPT-5.6 Terra 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-5.6 Terra: 7.0% of ChatGPT Plus (46.0% / 5h, 7.0% / 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-5.6 Terra | Advantage |
|---|---|---|---|
| Capability | 40% | 53% | +14% (GPT-5.6 Terra leads) |
| Median task time | 1m 38s | 2m 37s | 59s faster (Gemini 3.7 Flash leads) |
| Approx. task cost | $0.014 / task | $0.011 / task | $0.002 / task lower (GPT-5.6 Terra 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-5.6 Terra: 1.0% of ChatGPT Plus (10.0% / 5h, 1.0% / 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-5.6 Terra | Advantage |
|---|---|---|---|
| Capability | 61% | 34% | +27% (Gemini 3.7 Flash leads) |
| Median task time | 3m 37s | 2m 47s | 50s faster (GPT-5.6 Terra leads) |
| Approx. task cost | $0.028 / task | $0.028 / task | $0.000 / task lower (GPT-5.6 Terra 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-5.6 Terra: 0.6% of ChatGPT Plus (3.0% / 5h, 0.6% / 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-5.6 Terra?
Gemini 3.7 Flash clears higher: tier 4 of 5 versus tier 2 for GPT-5.6 Terra 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-5.6 Terra?
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-5.6 Terra used 8% of ChatGPT Plus's weekly limit per pass, $0.019 per task at the listed price; at the ~$100 tier the board defaults to that is an estimated ~1.6% of ChatGPT Pro 5x's weekly limit (est, about $0.019 per task). Per task, GPT-5.6 Terra is about 1.2x cheaper ($0.019 vs $0.023).