# Jev catches the Opus 5.5 effort drop

0xKiyoro reports that Jev detected Opus 5.5’s default effort dropping from high to medium, so agents without an explicit effort setting now reason at a lower level.

Grade: C — A clean typed decision with low volume or low value, or too vague to act on.. Score: 2.82.

Vertical: Software & tech.

Function: Agents & dev.

Status: Seen in the wild.

Volume: occasional.

Value: meaningful.

Risk: moderate.

Evidence: built and shown.

Flags: None.

- [Source](https://madewithjev.com/builds/opuss-effort-drop-detector)
- [Vertical](/verticals/saas_tech/)
- [Function](/functions/agents_dev/)
- [Prompt injection detection guardrail](/use-cases/prompt-injection-detection-guardrail/)
- [LLM output safety classification](/use-cases/llm-output-safety-classification/)
- [LLM cost-quality routing with RouteLLM](/use-cases/llm-cost-quality-routing-with-routellm/)
- [Claude Code hooks pre-tool-use validation](/use-cases/claude-code-hooks-pre-tool-use-validation/)
- [Log sensitive-data leak](/use-cases/log-sensitive-data-leak/)
- [Prompt injection scanner](/use-cases/prompt-injection-scanner/)