pattern-cross-model-review

Pattern: Cross-model review (an independent second opinion from another model)

Run a review of the same work through a different model or vendor, then surface where the two agree vs disagree — overlapping findings are high-confidence, unique findings are each model’s blind-spot catch. Independence is the point: a second instance of the same model shares its failure modes, so a genuinely different model (a different vendor entirely, ideally) catches errors the first cannot see, and disagreement is signal rather than noise.

Crucially, cross-model agreement is signal, not a mandate — gstack’s User Sovereignty ethos is explicit that “two AI models agreeing on a change is a strong signal, not a mandate; the user decides.” The pattern feeds a generation-verification loop, it does not automate the decision.

Why it’s distinctive

Distinct from pattern-adversarial-review (one reviewer tasked to find fault) and pattern-parallel-persona-review (many personas on the same model): here the diversity comes from the model itself. Two frameworks realize it — gstack (gstack-codex runs an OpenAI Codex review against Claude’s gstack-review and reports overlap vs unique findings; also the quality gate behind gstack-spec) and Compound Engineering (whose ce-code-review includes an adversarial + cross-model pass). gstack’s gstack-benchmark-models applies the same different-models-side-by-side idea to evaluating skills rather than reviewing code.

Applied by (backlinks)

gstack:

• gstack-codex — OpenAI Codex second opinion; cross-model overlap/unique analysis vs gstack-review.
• gstack-spec — uses the Codex cross-model gate to block low-quality specs.
• gstack-benchmark-models — the model-evaluation cousin (same prompt across Claude/GPT/Gemini).

Compound Engineering:

• ce-code-review — adversarial + cross-model review pass.

See Also

• pattern-adversarial-review — fault-finding by mandate (same model); often combined with this.
• pattern-parallel-persona-review — diversity by persona rather than by model.
• stage-review — the stage this reinforces (Review side).