EvoCode adds 227-turn agent evaluation for changing requirements
_philschmid · x · 2026-07-27
EvoCode is a new benchmark for agents under evolving requirements
The post highlights EvoCode, an eval designed to test whether coding agents can keep working as requirements change over time without regressing previously working behavior.
- 26 tasks
- 227 sequential rounds across tasks
- 5–15 rounds per task
- A single persistent container is used throughout
- Tests are run cumulatively after every turn
The key failure mode is not usually that agents cannot implement the new feature. More often, they update one part of the codebase and accidentally break something that already worked. The linked article argues this makes EvoCode a more realistic measure of agent reliability in iterative development.
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