Pinterest has signed an agreement to spend $4 billion on Amazon Web Services infrastructure through 2031, The Information reported. The deal is Pinterest\'s largest infrastructure contract to date. Under the agreement, Pinterest will use AWS Trainium chips for AI workloads and expand its use of Amazon\'s Graviton CPUs, which currently handle about one-third of its infrastructure. Pinterest plans to run large language and vision-language models for visual search.

The spread of mass-market AI models and companies’ efforts to cut costs could become an obstacle for OpenAI and Anthropic as they pursue IPOs at high valuations. Both are valued at more than $800 billion, but cost efficiency is becoming as important as performance in the enterprise AI market. Companies including Meta, Shopify, Spotify and Pinterest say higher AI and inference costs are squeezing margins.