EvoCode-Bench shows that single-round success rates for coding agents exceed multi-turn persistent execution rates by 22-40 points, with performance dropping below half of round-1 levels by round 5 across 13 evaluated agents.
They also verify that no test checks stale requirements that have been superseded by later rounds, which would cause otherwise correct implementations to fail
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EvoCode-Bench: Evaluating Coding Agents in Multi-Turn Iterative Interactions
EvoCode-Bench shows that single-round success rates for coding agents exceed multi-turn persistent execution rates by 22-40 points, with performance dropping below half of round-1 levels by round 5 across 13 evaluated agents.