What are OpenAI o3 and o4 reasoning models?

Models that think aloud via chain-of-thought before answering, boosting complex problem-solving but flopping on basics.

Do reasoning models fix AI hallucinations?

No—they add new failure modes like biased chains and error compounding.

Only with heavy verification layers; raw chains too brittle for high-stakes.

OpenAI's latest reasoning models sound like the future of AI problem-solving. I've been burned by similar promises before—let's cut through the spin.

theAIcatchup Apr 07, 2026 3 min read

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#AI failure modes #OpenAI o3

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Originally reported by dev.to