OpenAI o3 vs GPT-4 (4.0): A No-Nonsense Comparison Bottom line up-front: OpenAI’s o3 vs GPT-4 (4.0) OpenAI’s o3 (April 2025) is a brand-new “reasoning” model with a 200 K-token context window, a fresher May 2024 knowledge cut-off, native vision I/O, adjustable reasoning modes, and lower per-token prices than the original GPT-4 (“4.0”) from March 2023. GPT-4 still wins on mature benchmarks and instruction-following polish, but o3’s vast context, newer data, multimodal workflow and cheaper pricing make it the more attractive choice when you need big context or integrated image reasoning. Below is the fact-checked comparison. 1 · Core Specs at a Glance Feature o3 GPT-4 (4.0) First release 16 Apr 2025 14 Mar 2023 Knowledge cut-off 31 May 2...
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