Tested GPT-5, Opus, Sonnet on wash-sale-tracking.md spec.
Opus found a genuine spec bug (trigger logic described backwards).
Confirms pattern: GPT-5 for breadth, Opus for logic contradictions,
Sonnet adds no value for systematic analytical tasks.
New task type: specification gap/completeness analysis (vs adversarial gaming).
GPT-5 dominates count (25 findings), Opus produces best single insight
(realized P&L non-reversibility violates de-escalation model assumption).
Sonnet adds no unique value for this task type — skip for completeness audits.
Break the monolithic 3249-line findings file into 29 individual files,
one per experiment. Each file is named YYYY-MM-DD-NN-slug.md for easy
chronological sorting and discovery.
No content changes — purely structural reorganization.
Full comparative analysis of GPT-5, Claude Opus 4.6, Claude Sonnet 4.6,
GPT-4.1, and GPT-4.1 Mini on analytical tasks (not coding).
Contents:
- findings/ALL-FINDINGS.md — complete 3,249-line research log with all
29 findings, methodology notes, and open questions
- prompts/ — 6 exact prompts used across experiments
- methodology.md — experimental setup and evaluation criteria
- open-questions.md — unanswered questions for future work
- README.md — overview and summary table
Key findings:
- Cross-document consistency: Opus is 2.4x faster with more findings
- Gap-finding: GPT-5 reasoning tokens find domain-specific gaps
- Race conditions: Opus excels at temporal interaction reasoning
- Bias detection: Signal-to-noise ratio > model capability
- Adversarial analysis: GPT-5 exhaustive, Opus qualitatively different
Signed-off-by: Rodin
Rodin