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AIStacksHub

Best General AI AI Tools

The foundation of the modern artificial intelligence revolution. Explore highly versatile Large Language Models (LLMs), multi-modal systems, and autonomous personal assistants. These general-purpose conversational models and reasoning engines handle writing, analysis, search, logic solving, and complex instruction execution, serving as the essential starting point for productivity automation across various business, academic, and technical workflows.

Microsoft Copilot
general-ai

Microsoft Copilot

Microsoft’s AI assistant integrated across Windows, Edge, Microsoft 365, and GitHub, helping users chat, write, summarize documents, analyze data, generate images, and automate everyday work tasks with AI.

Paid (API / Enterprise)
ChatGPT
general-ai

ChatGPT

OpenAI's flagship conversational assistant. It is a highly versatile tool for everyday typing tasks, drafting code scripts, creative writing, and instantly answering complex questions across almost any industry domain.

Free • $20/mo
Claude
general-ai

Claude

Anthropic's advanced artificial assistant. It stands out in the industry for its incredible logical reasoning skills, its deep understanding of complex code, and its ability to analyse massive business reports without losing accuracy.

Free • $20/mo
DeepSeek V4
general-ai

DeepSeek V4

A high-performance open-weight AI platform known for advanced reasoning, coding, and large language models such as DeepSeek-R1 and DeepSeek-V4. It provides chat, coding, research, and API capabilities with a strong focus on efficient training, open model access, and developer-friendly AI infrastructure.

Free • Paid (API Usage)
Gemini
general-ai

Gemini

Google's native AI integrated with Search, Docs, and Gmail.

Free • $20/mo
NotebookLM
general-ai

NotebookLM

Google's research tool that turns documents into a knowledge base.

Perplexity
general-ai

Perplexity

An AI‑powered search engine that provides cited answers and fast, relevant responses to natural‑language queries.

Free • Paid
OpenRouter Reflection 70B
general-ai

OpenRouter Reflection 70B

A powerful multi-model chat hub and API gateway that offers unrestricted access to cutting-edge open-source AI. This specific layout runs the Reflection-70B model completely for free, featuring a unique error-correction system that forces the model to audit its own reasoning steps, debug its own code, and fix logic mistakes before delivering a final response.

Character.ai
general-ai

Character.ai

The world’s leading conversational platform for interacting with millions of user-created AI personalities, historical figures, fictional characters, and language tutors. Built on highly optimised custom LLMs, it supports hyper-realistic dialogue, voice-to-voice calls, multi-character group rooms, and interactive text-based gaming workflows.

Free Tier • $9.99/mo
Ai2 Playground
general-ai

Ai2 Playground

The official open-access research playground hosted by the Allen Institute for AI. Built to champion scientific transparency, it gives developers and researchers zero-cost access to frontier open models—including the chain-of-thought reasoning engine OLMo 3.1 Think and the natively multimodal Molmo 2 vision system capable of tracking objects and analysing raw video material.

Falcon Chat
general-ai

Falcon Chat

The official consumer chat platform for the sovereign Falcon LLM ecosystem. Built on a completely independent data pipeline and a unique hybrid architecture, it provides fast text creation, deep multilingual translation, and code-generation tasks completely for free, offering a fully open alternative to traditional proprietary platforms.

Z.Ai
general-ai

Z.Ai

A next-generation conversational AI platform powered by the ultra-advanced GLM series models. It excels at fast text completion, complex programming tasks, automated presentation slide generation, and multi-turn, human-like dialogue with a massive 200,000-token context window.

Free Tier • Premium Plans Available
Not Diamond
general-ai

Not Diamond

An advanced AI router and multi-model chat dashboard. It functions as an automated meta-model selector, evaluating your prompt's intent, complexity, and language syntax in real-time to automatically send your request to the absolute best LLM available, maximising output accuracy while dramatically slashing processing costs.

Free Tier • Developer API Plans Available
ChatGLM (智谱清言)
general-ai

ChatGLM (智谱清言)

The premier conversational AI workspace powered by Z.ai's flagship GLM-5 model. Featuring an advanced "Agent Mode" and a massive 200,000-token memory, it functions as an autonomous assistant that instantly transforms text prompts into presentation slides, functional application code blocks, and fully formatted spreadsheets (.xlsx), PDFs, and document packages cleanly.

Free Tier • Premium Plans Available
Reka AI
general-ai

Reka AI

An elite multimodal AI companion capable of processing text, images, audio, and native long-form video files seamlessly. Designed for advanced contextual reasoning, it lets you upload entire video clips or large documents and ask complex questions, pull auto-summaries, or run deep live web-research tasks effortlessly.

Free Tier • Premium Plans Available
ChatPDF
general-ai

ChatPDF

Talk directly to your heavy textbooks and study packets. Instead of scrolling through hundreds of pages, you can upload any file and ask it questions to get immediate page references and clear chapter summaries.

Free Tier • $5.99/Month
Mistral
general-ai

Mistral

A premier frontier AI conversational assistant and productivity suite. Powered by advanced open-weight models (like Mistral Large 3 and Mistral Small 4), it offers a highly advanced "Canvas mode," deep research modules, async coding agents, web search tools, and image generation, delivering massive contextual intelligence at a fraction of standard API costs.

Free • $14.99/mo Pro
Poe
general-ai

Poe

The ultimate all-in-one AI chatbot aggregator created by Quora. Using a flexible compute points system, it lets you access, switch, and chat with all major frontier models—including GPT-5, Claude Opus, Gemini Pro, and FLUX image generators—inside a single web or mobile interface, while allowing users to build and monetise their own custom community prompt bots.

Free Tier • $19.99/mo Standard
OpenWebUI
general-ai

OpenWebUI

OpenWebUI is a free tool that gives your locally downloaded AI models a beautiful, easy-to-use chat screen. It looks and feels just like ChatGPT, but you have complete control over it.

LM Studio
general-ai

LM Studio

LM Studio is an easy-to-use desktop app for Mac and Windows. It lets you download and chat with different AI models completely offline, so you do not need an internet connection to use them.

AnythingLLM
general-ai

AnythingLLM

AnythingLLM lets you turn your personal documents into a smart chatbot. You can drag and drop your PDFs and word files into the app, and then ask the AI direct questions about the text.

Free • Paid
LMArena
general-ai

LMArena

A community-driven AI evaluation and comparison platform where users can test, compare, and rank leading AI models through real-world prompts, coding tasks, writing, image generation, and human feedback.

GenSpark
general-ai

GenSpark

An AI‑powered assistant platform for generating insights, automations, and intelligent workflows across tasks.

Free • Paid
Agent Minimax
general-ai

Agent Minimax

An advanced AI agent platform for task automation and workflow

Free • Paid
Duck.ai
general-ai

Duck.ai

Privacy-focused AI chat access without accounts from DuckDuckGo.

DuckDuckGo
general-ai

DuckDuckGo

The search engine that doesn't track you, now with AI Chat.

Free • Paid
Hugging Chat
general-ai

Hugging Chat

Open source chat assistant powered by top community models.

Pi AI
general-ai

Pi AI

The supportive and conversational personal AI from Inflection.

You.com
general-ai

You.com

The AI search engine with a focus on customizable search agents.

Free • Paid