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Fast vs. Deep Research

Difference between Fast and Deep Research

Winson Luk avatar
Written by Winson Luk
Updated this week

Ithy offers two primary modes for generating articles: "Search" (also known as "AI Search" or "Fast Research") and "Research" (also known as "Deep Research"). Understanding the differences between these modes will help you choose the best option for your specific needs, whether you require a quick overview or a comprehensive exploration of a topic.


Search (Fast Search/Research) - Gold color

Under the hood, Ithy issues fewer search queries, caps response length, and skips expensive reconciliation steps. Citations are lighter; visuals are limited (no radar charts or mind maps).

Characteristic

Details

Latency

15–45 seconds typical.

Model Mix

Single high-speed LLM plus skimmed web snippets.

Depth

Executive summary-level.

Best For

Brainstorming, flashcards, elevator pitches, quick definitions.

Fast Research mode is visually distinguished by a gold-colored button and is designed for users who need quick answers or overviews of topics. Key characteristics include:

  • Speed-optimized processing that prioritizes faster delivery of results

  • Uses fewer AI models than Deep mode

  • Ideal for straightforward questions, general information queries, or when you need a quick overview

  • Perfect for time-sensitive research or initial exploration of a topic

  • Shows the same "Your article will take 1 minute to generate" message, but may complete faster

Despite its focus on speed, Fast Research mode still leverages multiple search sources to provide quality results. The content may be less exhaustive than Deep Research but remains well-structured and informative.


Research (Deep Research) - Teal color

Deep mode goes wide (broader source net) and goes long (multi-round deliberation). Expect richer statistics, conflicting viewpoints reconciled, and more visuals if enabled.

Characteristic

Details

Latency

60–180 seconds typical.

Model Mix

3–6 specialised LLMs voting and elaborating.

Depth

Journal-article calibre.

Best For

Strategy decks, grant proposals, university essays, technical tutorials.

Deep Research mode is visually distinguished by a teal-colored button and serves as the platform's default mode if not explicitly changed. This mode is designed for users who need comprehensive, in-depth analysis of topics. Key characteristics include:

  • Combines multiple researchers and AI models for maximum depth and breadth

  • Prioritizes thoroughness over speed, potentially taking longer to generate

  • Ideal for complex questions, academic research, or when you need detailed analysis

  • Perfect for comprehensive exploration of nuanced topics

  • May include more extensive citations and references

Deep Research mode excels at handling complex queries that require synthesis of information from multiple sources. The resulting articles tend to be more comprehensive, with greater attention to detail and nuance.

Supported Models

Ithy is constantly updated with the latest AI models. These typically include releases from OpenAI ChatGPT, Google Gemini, xAI Grok, Perplexity Sonar, DeepSeek, and others.

You can ask a question on Deep Research to show the current models being used.

Choosing Individual Models

Ithy does not currently support the selection of individual models.

The biggest benefit of Ithy is that the models we choose are guaranteed to be the best, and we've extensively tested the exact set of models to make sure they work well together when blended.

While choosing individual models is a frequently requested feature, our tests have shown that user-selected models always underperform the set of models optimized by Ithy.


Choosing Between Modes

Consider these factors when deciding which mode to use:

  • Time constraints: If you need information quickly, Fast mode may be preferable

  • Complexity of topic: For nuanced or specialized topics, Deep mode will provide better results

  • Depth required: For surface-level information, Fast mode is sufficient; for comprehensive analysis, choose Deep mode

  • Account tier: Pro users have access to enhanced versions of both modes

You cannot change mode once the generate button is pressed. Cancel (close tab) and resubmit if you pick the wrong on

Remember that regardless of which mode you choose, you'll still receive a well-structured article. The primary difference lies in the depth and breadth of the content rather than its basic quality or format.

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