Bing Deep Search

Bing Deep Search is Microsoft's agentic search feature in Bing that uses GPT-4 models to handle complex queries through deep web exploration — taking up to 30 seconds to generate comprehensive, highly tailored answers rather than instant traditional search results. Originally launched as an experimental feature in early 2024, Deep Search has evolved by 2026 into a core component of Microsoft's agentic search strategy, transitioning Bing from a "decision engine" to a "reasoning partner" with capabilities including query expansion, disambiguation, and multi-source synthesis. Pricing is fully integrated into the broader Microsoft search and AI ecosystem rather than standalone. Bing Deep Search is accessible free through Bing search, with Microsoft Copilot Pro ($20/month) providing expanded usage and faster processing. Microsoft 365 Copilot subscriptions ($30/user/month) for enterprise customers include enhanced Deep Search capabilities integrated with Microsoft 365 workspace data. The free tier provides genuine evaluation experience without payment. Bing Deep Search's differentiation versus Google Search, Gemini Deep Research, and other AI search tools is the GPT-4 integration combined with the existing Microsoft ecosystem and traditional Bing search infrastructure: rather than building a new agentic research product (Gemini Deep Research pattern) or relying purely on third-party search APIs (Perplexity pattern), Bing Deep Search extends Microsoft's mature Bing search infrastructure with GPT-4 reasoning. This produces materially better familiarity for users already in the Microsoft ecosystem while leveraging Microsoft's OpenAI partnership for foundation model access. Bing Deep Search capabilities include query expansion and disambiguation through GPT-4 understanding, comprehensive web exploration with up to 30-second processing, multi-source synthesis with citations, integration with Microsoft 365 workspace data (Copilot tiers), Microsoft Edge and Windows integration, and access through Bing.com and Microsoft AI products. The platform serves consumers, professionals, and enterprise users globally with particular value for those already in the Microsoft ecosystem. Microsoft operates Bing Deep Search under SOC 2 Type II, ISO 27001, GDPR, HIPAA, FedRAMP, and broader enterprise compliance.