Gemini 3.7 Flash vs Claude Fable 5.1
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.
| Dimension | Gemini 3.7 Flash | Claude Fable 5.1 | Advantage |
|---|---|---|---|
| Capability | 60% | 73% | +13% (Claude Fable 5.1 leads) |
| Median task time | 2m 38s | 1m 46s | 52s faster (Claude Fable 5.1 leads) |
| Approx. task cost | $0.025 / task | $0.026 / task | $0.000 / 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. Claude Fable 5.1: 28.0% of Claude Max 20x (28.0% / 5h, 5.0% / 1w) per run. Its weekly limit holds about 7.2 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 Fable 5.1 | Advantage |
|---|---|---|---|
| Capability | 40% | 74% | +35% (Claude Fable 5.1 leads) |
| Median task time | 1m 38s | 6m 51s | 5m 13s faster (Gemini 3.7 Flash leads) |
| Approx. task cost | $0.014 / task | $0.051 / task | $0.038 / 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 Fable 5.1: 15.0% of Claude Max 20x (15.0% / 5h, 2.0% / 1w) per run. Its weekly limit holds about 7.2 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 Fable 5.1 | Advantage |
|---|---|---|---|
| Capability | 61% | 85% | +23% (Claude Fable 5.1 leads) |
| Median task time | 3m 37s | 3m 48s | 11s faster (Gemini 3.7 Flash leads) |
| Approx. task cost | $0.028 / task | $0.025 / task | $0.003 / task lower (Claude Fable 5.1 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 Fable 5.1: 1.8% of Claude Max 20x (1.8% / 5h, 0.2% / 1w) per good solve. Its weekly limit holds about 7.2 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 Fable 5.1?
Both clear tier 4 of 5, but Claude Fable 5.1 scores higher on capability: 73% versus 60% on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-08-30.