Prove the lift · AI model performance evaluation

gemini-2.5-flash vs grok-3

+13-point lift for gemini-2.5-flash on code-review-bench

Test summary

This benchmark evaluates gemini-2.5-flash against grok-3 on the code-review-bench v2 dataset (5 rows), scored by an LLM-as-judge (claude-haiku-4-5). gemini-2.5-flash reached a 47% pass rate versus 34% for grok-3 — a +13-point lift.

Base model
grok-3
via xai · 34% pass rate
Refined model
gemini-2.5-flash
via google · 47% pass rate · 2.8s p95
Base pass rate
34%
Refined pass rate
47%
Refined p95
2.8s
Est. tokens saved
4.1K
+0pts
refined beats base on 5 rows
0%
Base model
0%
Invoked-refined
2 improved0 regressed3 unchanged

Per-row results

1Flag an off-by-one in a pagination loop0%100%+100
2Detect a missing await on an async DB write100%100%0
3Note a broken null-check after a refactor0%0%0
4Find a resource leak on an early-return path0%0%0
5Spot a race in a read-modify-write on shared state0%100%+100
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