Train and evaluate models on the world's highest-quality knowledge

AI labs put Exa Search inside training and eval loops. During post-training RL rollouts, the model retrieves from Exa's index of 100 billion documents, and the same index grounds live-web evals. Exa returns passages rather than full pages, which cuts tokens in every rollout, and Exa Snapshot pins page content to a chosen date so later runs stay comparable.

A Qwen3-4B model trained with Exa Search in the loop beat the same model trained on SERP search on SimpleQA (0.767 vs 0.692), HotpotQA (0.694 vs 0.684), and 2WikiMultihopQA (0.839 vs 0.798) in Exa's study of May 13, 2026. It also got there with 69% fewer tokens, 62% fewer search calls, and 58% fewer turns.

Lock every search to a date before the eval's answers were published. With Exa Snapshot, set snapshotAsOf and Exa returns only page versions stored at or before that datetime, omitting versions of the page that were updated afterwards.

Labs usually combine open web dumps, licensed datasets, and data marketplaces. Exa offers its index of 100 billion documents as a clean training corpus, drawn from over 2 trillion tracked URLs and partner data across news, research, code, case law, and financial markets. Talk to Exa sales about corpus access.

Common Crawl is a free archive of raw web crawls that you download, filter, and clean yourself, which suits teams with their own data pipeline. Exa delivers a cleaned corpus from its index of 100 billion documents that a lab can search by meaning, pulling only the documents a training run needs.

Exa is the search tool the agent calls during rollouts. Exa returns the relevant passages rather than full pages, which keeps rollouts short and token-efficient. In Exa's published study, a Qwen3-4B agent trained with Exa matched a SERP-trained agent with 69% fewer tokens. Our RL search webinar walks through that setup.

On pay-as-you-go, Exa Snapshot covers a rolling five-month window at 10 queries per second. After 100 requests, talk to sales to continue. Set snapshotAsOf on a search or contents request to pin results to any datetime in that window.

Yes. The Batch API runs Exa requests asynchronously in batches, and Enterprise plans add custom rate limits and up to 1,000 results per search. Talk to Exa sales about volume pricing.

Yes. Exa is SOC 2 Type II audited and honors GDPR and CCPA data-subject rights. Enterprise plans offer zero data retention, HIPAA with a BAA, SSO and SCIM, and a custom MSA and DPA. To access audit reports, request them in the Trust Center or talk to our team.