FastGPT is an AI-powered tool developed by Kagi, designed to provide users with quick general topic summaries from the web. It focuses on processing speed, capable of delivering answers in as little as ~900ms by incorporating a full search engine underneath. This approach aims to overcome the limitations of large language models, offering faster and more accurate results for users seeking rapid understanding rather than in-depth information.

FastGPT's main strengths lie in its fast processing speed, optimization for quick outputs, and integration of a full search engine for improved accuracy. It serves as a valuable tool for those looking for quick overviews of specific topics, but may not be suitable for in-depth research due to its prioritization of speed over accuracy and limited coverage of detailed information.