Snowflake Open-Sources Data Engineering Agent Benchmark
AlexGDimakis · x · 2026-08-07
Snowflake, in joint work with Bespoke Labs, has open-sourced data-eng-bench, a benchmark for repository-level data engineering. The benchmark hands an agent a live dbt project connected to an enterprise-scale data warehouse, asking it to build and fix real data pipelines, and evaluates the output against business rules.
Key Insight:
In data engineering, the agent harness matters just as much as the model. Testing reveals that using the exact same Claude Opus model, Snowflake's data-native CoCo harness achieves a 73.8% Pass@1 rate at 3.9× lower cost than generic coding agents. With Sonnet, CoCo delivers the same quality at 2.3× lower cost, proving that domain-specific agent architectures yield massive efficiency gains.
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