Apple shares jumped 2% to hit six-week high on Tuesday.

Apple is considering using artificial intelligence technology from Anthropic PBC or OpenAI to power a new version of Siri, sidelining its own in-house models in a potential blockbuster move aimed at turning around its flailing AI effort.

The iPhone maker has talked with both companies about using their large language models for Siri, according to people familiar with the discussions. It has asked them to train versions of their models that could run on Apple’s cloud infrastructure for testing, said the people, who asked not to be identified discussing private deliberations.

If Apple ultimately moves forward, it would represent a monumental reversal. The company currently powers most of its AI features with homegrown technology that it calls Apple Foundation Models and had been planning a new version of its voice assistant that runs on that technology for 2026.

A switch to Anthropic’s Claude or OpenAI’s ChatGPT models for Siri would be an acknowledgment that the company is struggling to compete in generative AI — the most important new technology in decades. Apple already allows ChatGPT to answer web-based search queries in Siri, but the assistant itself is powered by Apple.

Apple’s investigation into third-party models is at an early stage, and the company hasn’t made a final decision on using them, the people said. A competing project internally dubbed LLM Siri that uses in-house models remains in active development.