antigravity-cli + gemini-3.1-pro vs claude-code + claude-fable-5
Each agent graded on the same private suites, running headless through its own tools. Deltas are oriented so a win is a win, whichever way the metric runs.
antigravity-cliantigravity-cli + gemini-3.1-proSolves up to tier 5 at 16.8% of Google AI Pro per run · 5.9 runs/weekoverall pendingclaude-cliclaude-code + claude-fable-5Solves up to tier 5overall pending
real-world@v3DvsC
| Dimension | antigravity-cli + gemini-3.1-pro | claude-code + claude-fable-5 | Delta |
|---|---|---|---|
| Capability | 47% | 60% | 13% · claude-code + claude-fable-5 |
| Median latency | 150525 ms | 169381 ms | 18856 ms · antigravity-cli + gemini-3.1-pro |
| Reliability | 100% | 100% | even |
| Error rate | 0% | 0% | even |
antigravity-cli + gemini-3.1-pro: 16.8% of Google AI Pro per run, about 5.9 runs per week. claude-code + claude-fable-5: plan cost not measured. 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.