gemini-3.1-pro vs claude-fable-5
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-3.1-pro | claude-fable-5 | Advantage |
|---|---|---|---|
| Capability | 47% | 60% | +13% (claude-fable-5 leads) |
| Median task time | 4m 24s | 3m 5s | 1m 19s faster (claude-fable-5 leads) |
| Approx. task cost | $0.025 / task | $0.031 / task | $0.006 / task lower (gemini-3.1-pro leads) |
gemini-3.1-pro: 8.0% of Google AI Pro (48.1% / 5h, 8.0% / 1w) per run. claude-fable-5: 34.0% of Claude Max 20x (34.0% / 5h, 4.0% / 1w) per run. Each figure is a share of that agent's own plan, so there is no delta to draw.
| Dimension | gemini-3.1-pro | claude-fable-5 | Advantage |
|---|---|---|---|
| Capability | 25% | 85% | +59% (claude-fable-5 leads) |
| Median task time | 4m 34s | 5m 11s | 38s faster (gemini-3.1-pro leads) |
| Approx. task cost | $0.032 / task | $0.038 / task | $0.006 / task lower (gemini-3.1-pro leads) |
gemini-3.1-pro: 0.7% of Google AI Pro (4.2% / 5h, 0.7% / 1w) per good solve. claude-fable-5: 2.8% of Claude Max 20x (2.8% / 5h, 0.6% / 1w) per good solve. 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-3.1-pro or claude-fable-5?
claude-fable-5 clears higher: tier 4 of 5 versus tier 3 for gemini-3.1-pro on real-world@v3, our private suite of real-world coding problems. Latest measurement 2026-08-10.