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Blocked domains (reddit.com, twitter.com, x.com, instagram.com, facebook.com, ebay.com, nytimes.com, cnn.com, reuters.com, or craigslist.org) return 400 — do not 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Use the 'deep' type for comprehensive research tasks and 'fast' for latency-sensitive lookups.","instructions":null,"reviewSummary":"Exa's neural search consistently surfaces authoritative, relevant sources across technical, academic, and consumer domains, often with rich full-text results at low cost. Accuracy is generally strong, though summaries occasionally infer beyond explicit source text, some PDF results return without titles, and synthesis with negative constraints (EXCLUDE lists) can produce empty outputs. 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