The accessibility of deep research features varies significantly across the different service tiers offered by each platform. Grok’s DeepSearch is available to all X users, including those on the free tier, albeit with limitations on query frequency and other features 17. For unrestricted access to Grok-3’s advanced capabilities, users need to subscribe to X Premium+ ($50/month or $350/year) or SuperGrok ($30/month or $300/year), with SuperGrok explicitly including DeepSearch and enhanced reasoning modes 19. This model ties Grok’s AI features directly to the X platform’s subscription structure. ChatGPT’s Deep Research is primarily a feature for paid subscribers. While the free tier offers limited access to GPT-4o and web search, Deep Research is available on the Plus plan ($20/month) with a limit of 10 queries per month, and on the Pro plan ($200/month) with a significantly higher limit of 120 queries per month. Team, Edu, and Enterprise users also have access to this feature 3. This tiered approach makes Deep Research more accessible at a lower price point than initially offered. Gemini offers Deep Research on both its free and paid tiers. The free tier provides access to the 2.0 Flash model with limited Deep Research capabilities. The Gemini Advanced subscription ($19.99/month) offers expanded access to Deep Research and more advanced models like Gemini 2.5 Pro 9. Recent updates have also made some features previously exclusive to Gemini Advanced, including Deep Research, available to all users 10, suggesting a broader accessibility strategy. Perplexity provides Deep Research on its free tier with a daily limit of 5 queries for logged-in users 13. The Professional plan ($20/month or $200/year) significantly increases this limit to over 300 Pro Searches per day, which includes access to advanced AI models and unlimited file uploads 12. This freemium model allows users to experience the deep research capabilities with a free account while offering substantial enhancements for paid subscribers., Unlike Grok, which was strong in synthesis but sometimes leaned into broader narratives, Perplexity maintained a precise, research-backed approach, making it more reliable for in-depth, factual, Companies like Perplexity, ChatGPT, and Grok are introducing fresh perspectives on search, leveraging artificial intelligence to provide more conversational, intuitive experiences that directly challenge the traditional links-based model Google has long championed..