August 2026 Summaries

Exa has introduced Dynamic Highlights, a research-preview search feature designed to reduce the context and cost burden of web-search agents by selecting relevant tokens across a set of URLs rather than extracting snippets from each page independently. The system combines retrieved documents into a unified input and uses a single forward pass to allocate more space to useful sources while omitting irrelevant or duplicative material, reportedly reducing returned token counts by an average of 95% compared with full-page content. In single-turn RAG evaluations, Exa reports a 40% token-efficiency improvement and a 3.8% quality increase relative to existing highlights at a 12,000-character budget, while agentic evaluations showed a 30% reduction in total token usage alongside a 2.1% average quality gain. Dynamic Highlights can be enabled in Exa’s API by setting the highlights dynamic option to true, though the company notes that the capability remains under active development.

Exa announced that it now powers Firefox’s AI search features, including Smart Window on desktop and Quick Answers on iOS, providing live-web AI summaries with inline source citations rather than relying solely on language-model training data. Firefox uses Exa’s search API to retrieve, rank, and extract relevant information from its index of 1.4 trillion URLs and 100 billion documents, with different tuning for open-ended desktop queries and concise mobile responses. Mozilla can restrict results to selected domains, manage freshness for timely topics, and apply content-moderation filters, while Exa states that it retains none of Firefox’s query data. The partnership followed evaluations of multilingual performance, latency, safety, and privacy, reflecting both companies’ stated focus on transparency, trust, and user privacy.