Corund vs LLM code reviewers

Opinion vs proof -- use both

LLM-based review tools ("AI agents for code verification," in their own category language) read a diff and give you an opinion: this looks risky, this pattern is unusual, this might be a bug. That is real signal, and worth having -- a model can flag things a deterministic check structurally cannot, like an odd architectural choice or a subtle logic smell no test yet covers.

Corund gives you a different kind of thing: a mechanical, deterministic proof that one specific test can fail before it is trusted to guard against one specific regression. We do not fight for the word "verification" -- if an LLM reviewer wants that word, it can have it. What we own is proof, gate-integrity, and the fake-green problem: the fact that, today, a green checkmark means a suite ran and returned 0, nothing more.

LLM code reviewers

Opinion -- a model reads the diff and says what it thinks, informed by pattern-matching across code it has seen before.

Corund (C1-C4)

Proof -- a deterministic revert-and-rerun, a skip audit, a gate-fold check, and an approval binding. No model judgment decides any of the four verdicts.

These are not competing purchases. An opinion catches what a revert cannot; a revert catches the one thing an opinion structurally cannot -- whether the test guarding the fix is even capable of failing. Run both.

The trust gap an opinion doesn't close

96% of developers say they do not fully trust AI-generated code, and only 48% say they always verify it before committing. An LLM reviewer reading the same AI-generated diff doesn't close that gap by itself -- it is still a model forming an opinion about model output, which is a different thing from a deterministic check that a specific test can fail.

Source: Sonar, State of Code Developer Survey 2026 (fieldwork October 2025; 1,149 professional developers). Full citation: /docs#sources (/marketing/sources.md).

How we'll measure the gap

/bench compares Corund's measured catch rate against LLM-judge baselines by category, once there is a number to publish -- and it names no vendor without a measured run behind the name.

The claim, exactly

LLM code review is a real, useful category, and using one alongside Corund is the recommendation, not a contradiction. The claim here is narrower: no CI product enforces red-on-revert plus skip-audit plus gate-fold plus approval-binding together, at merge time, the way an opinion-based reviewer does not and structurally cannot. See the fuller framing on the Compare overview.