What’s the best model for code review?

O4-mini balances depth, speed, cost — use O1 for mission-critical, O3-mini for most, GPT-4o for trivia.

Will reasoning models replace human reviewers?

Not fully — they miss context like team conventions — but they'll handle 80% volume, freeing devs for design.

How much more do O1 models cost?

O1's 10-15x pricier than minis; factor 5x tokens into real bills.

O1, O3-mini, O4-mini: Redefining Code Reviews

Forget pattern-matching code reviews. OpenAI's O1, O3-mini, and O4-mini think like engineers, tracing paths standard models miss. But cost and speed? That's the real battle.

DevTools Feed Apr 03, 2026 4 min read 10 views

Benchmark chart comparing O1, O3-mini, O4-mini on code review accuracy

⚡ Key Takeaways

Reasoning models excel at concurrency, security, and refactors where GPT-4o falters. 𝕏
O4-mini offers near-O1 performance at O3-mini prices — the new default. 𝕏
Hybrid workflows: Use cheap models for routine PRs, reasoning for complex. 𝕏

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#LLM benchmarks #O1 O3-mini O4-mini #OpenAI reasoning models #code review AI

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