ByHeather MacAvelia·Last verified Jun 18, 2026

Bing Deep Search

Name: Bing Deep Search
Author: Microsoft

★4.1/ 5

by Microsoft

Independently Reviewed

Visit bing.com →

Microsoft agentic search feature in Bing using GPT-4 for complex queries with autonomous multi-source web exploration. Up to 30 second processing. Free in Bing. Copilot Pro $20/mo for expanded use.

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Custom

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GitHub

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Rating

MCP

Compatible

Bing Deep Search is an agentic search feature within Microsoft Bing that uses GPT-4 to handle complex queries through deep web exploration, taking up to 30 seconds to generate comprehensive, tailored answers rather than instant traditional search results. Launched officially in March 2024 for all users, Deep Search is part of Microsoft's transition of Bing from a traditional search engine to a reasoning partner with capabilities including query expansion, disambiguation, and multi-source synthesis. Bing reached 1 billion monthly active users in April 2026, providing Deep Search with massive distribution. Deep Search operates within the broader Microsoft ecosystem. Copilot integration allows Deep Search results to feed into Microsoft 365 workflows. Microsoft Edge provides native access through the browser. Integration with Microsoft 365 Copilot ($30/user/month) enables Deep Search against workspace data alongside web data. Copilot Pro ($20/month) provides expanded usage and faster processing. The feature relies on Microsoft's OpenAI partnership for GPT-4 access combined with Bing's mature search index infrastructure. Pricing is free at the base level: visit Bing.com, enter a complex query, and click the Deep Search button. No payment, no account required for basic use. Copilot Pro ($20/month) adds expanded usage and faster processing. Microsoft 365 Copilot ($30/user/month for enterprise) integrates Deep Search with workspace data. The free tier provides a genuine evaluation experience without commitment. Deep Search is a feature within Bing, not a standalone research product. For dedicated agentic research with project management and citation export, ChatGPT Deep Research ($20/month via ChatGPT Plus) and Gemini Deep Research ($19.99/month via Google AI Premium) offer purpose-built research workflows. Perplexity AI ($20/month Pro) provides a consumer research interface with structured citations. Tavily ($0.008/credit, 2M+ developers) and Exa AI ($7/1K requests) serve developers building AI search into applications. Output quality depends on Bing index coverage, with quality degrading for niche or paywalled research domains. As of Q2 2026, Bing Deep Search remains available for all users through Bing.com with the Deep Search button on search results pages. Bing reached 1 billion monthly active users in April 2026. The feature uses GPT-4 for query expansion and reasoning. Microsoft operates Bing under enterprise-grade security including SOC 2 Type II, ISO 27001, GDPR, and HIPAA compliance at the platform level. Bing Search APIs were retired in August 2025, with Microsoft directing developers to Grounding with Bing Search as part of Azure AI Agents for API access.

Pricing

free

View pricing ↗

Segment

b2b

Setup

easy

Verified

Jun 18, 2026

Transparency

Public

Contract

Month-to-month

Data training

Not Disclosed

Autonomy

Autonomous

Capabilities

web-searchcitationsdeep-researchdata-analysis

Pros & Limitations

Editorial assessment

Pros

✓Free access with no account required: visit Bing.com and click the Deep Search button on any search results page, providing the lowest friction evaluation path of any agentic search tool compared to ChatGPT Deep Research ($20/month) or Gemini Deep Research ($19.99/month).
✓Microsoft ecosystem integration is genuinely differentiated for enterprise users: Microsoft 365 Copilot integration lets Deep Search query workspace data alongside web data, and Edge provides native browser access, creating value for organizations already committed to the Microsoft stack.
✓GPT-4 combined with Bing's 1 billion MAU search index provides foundation model reasoning on top of a mature, continuously updated web index with decades of search infrastructure investment behind it.

Limitations

⚠Feature within Bing rather than a dedicated research product: no project management, no research history, no citation export, and limited discoverability compared to purpose-built tools like ChatGPT Deep Research or Perplexity AI that center their entire experience around agentic research workflows.
⚠30-second processing creates friction versus instant search: comprehensive answers come at the cost of immediacy, which means users needing fast factual lookups should use traditional Bing search rather than Deep Search for routine queries.
⚠Output quality depends on Bing index coverage and GPT-4 synthesis: quality degrades for niche topics, paywalled research domains, and specialized academic content where dedicated research tools like Elicit ($49/month, 138M papers) or Consensus ($10/month, 250M+ papers) provide deeper indexed coverage.

Technical Details

Deployment

webapi

Model architectureGPT-4

Avg setup time< 1 minute (visit Bing.com, search a complex query, click Deep Search button)

Autonomous rateBing Deep Search handles autonomous query expansion through GPT-4 understanding, multi-source web exploration across the Bing index, disambiguation of user intent, and synthesis of comprehensive answers with citations. Users review the final answer. Processing takes up to 30 seconds for complex queries.

Integrations

Microsoft CopilotMicrosoft EdgeMicrosoft 365Microsoft OutlookMicrosoft TeamsAzure AI AgentsWindows Search

Security

SOC 2 Type IIISO 27001GDPRHIPAA