OpenAI is indeed hiring engineers to help customize its AI models for clients, adopting a consulting approach similar to Palantir's business model.
OpenAI hires engineers to customize AI models, mirroring Palantir.

FactVerify
Source: factverify.com
What the Evidence Shows
The claim that OpenAI hires engineers to customize AI models, mirroring Palantir, is mostly true based on the available information. According to a report from The Information, OpenAI is expanding its consulting services and taking a page from Palantir's playbook by working closely with large companies and government agencies to tailor AI solutions. This indicates a strategic shift toward more hands-on, customized deployments rather than just providing off-the-shelf AI products.
Furthermore, an MSN article confirms that OpenAI allows companies to customize its most powerful AI models by uploading their data for fine-tuning, a process supported by OpenAI engineers such as John Allard who work on customization efforts. This hands-on customization service aligns with the consulting and tailored deployment approach that Palantir is known for. While the sources do not explicitly state that OpenAI's entire engineering hiring strategy is modeled after Palantir, the evidence shows that OpenAI is indeed adopting a similar model of close client collaboration and customization through engineering support.
Therefore, the claim is accurate in essence but should be understood as OpenAI adopting some aspects of Palantir's approach rather than fully mirroring it in all respects.