UPDATE: Apr. 16, 2025, 2:18 p.m. EDT Now that the OpenAI livestream has ended, this article has been updated with the latest information about the o3 and o4-mini launch. OpenAI's o3 and o4-mini models ...

First reported by TechCrunch, OpenAI's system card detailed the PersonQA evaluation results, designed to test for hallucinations. From the results of this evaluation, o3's hallucination rate is 33 ...

A mere two days after announcing GPT-4.1, OpenAI is releasing not one but two new models. The company today announced the public availability of o3 and o4-mini. Of the former, OpenAI says o3 is its ...

It's been framed as part of a broader model lineup refresh timed with “the previously announced retirement” of GPT-5 (Instant and Thinking) within ChatGPT.

OpenAI is preparing to launch as many as three new AI models, possibly called "o4-mini", "o4-mini-high" and "o3". Right now, ChatGPT has as many as five models, including GPT 4o (the non-reasoning ...

GPT-4.1 mini, and OpenAI o4-mini as users shift to GPT-5.2. Discover the reasons and future plans for ChatGPT.

OpenAI today launched o3 and o4-mini, the latest additions to its lineup of reasoning-optimized language models. The product milestone came against the backdrop of reports that the company may acquire ...

OpenAI has announced the release of new AI inference models, 'o3' and 'o4-mini'. OpenAI calls o3 'OpenAI's most advanced inference model ever', and claims that it outperforms previous models in ...

OpenAI announced on Wednesday the launch of o3 and o4-mini, new AI reasoning models designed to pause and work through questions before responding. The company calls o3 its most advanced reasoning ...

On Wednesday, OpenAI launched its latest reasoning models, o3 and o4-mini. As with its other o-series models, OpenAI's o3 and o4-mini think for a longer period of time before responding in order to ...