Best AI Chatbots & Assistants (2026)
General-purpose AI chatbots for conversation, research, and productivity.
8 tools reviewed
Tier Rankings
Detailed Comparison
| # | Tool | Score | Best For | Price | Free Tier | |
|---|---|---|---|---|---|---|
| 1 |  ChatGPT | 8.8 | Everyone. Seriously -- if you're new to AI or want the most ... | Free / $8 | Yes | Review |
| 2 |  Perplexity AI | 8.5 | Researchers, students, professionals, and anyone who needs f... | Free / $20 | Yes | Review |
| 3 |  Alexa+ | 8.3 | Households already in the Amazon ecosystem (Prime, multiple ... | Free / $19.99 | Yes | Review |
| 4 |  Gemini Notebook (formerly NotebookLM) | 7.8 | Students researching papers, professionals who need to quick... | Free / undefined | Yes | Review |
| 5 |  Microsoft Copilot | 7.5 | Users already deep in the Microsoft ecosystem who want free ... | Free / $20 | Yes | Review |
| 6 |  Poe | 7.5 | AI power users who want to try multiple models without manag... | Free / $19.99 | Yes | Review |
| 7 |  Siri AI (Apple) | 7.5 | Anyone already in the Apple ecosystem with a qualifying devi... | Free / undefined | Yes | Review |
| 8 |  Character.AI | 6.5 | Casual users on the free tier who just want to chat with pre... | Free / $9.99 | Yes | Review |
All AI Chatbots & Assistants Reviews
ChatGPT
The chatbot that started the AI revolution. **GPT-6 Astra launched 2026-09-03** -- OpenAI's new flagship at $10/$50 per 1M (long-context $20/$75, Fast mode 2x, no Fast mode under EU data residency), rolling out to Plus, Pro, Business and Enterprise within existing allowances, and the **first model OpenAI has ever designated Critical for cyber capability**. Enterprise access is off by default at launch. On 2026-08-06 the free tier changed materially: GPT-5.6 Luna becomes the default for Free and Go users with UNLIMITED text chats and a new Think button, while Plus/Pro get a retuned GPT-5.6 Sol in Chat plus an effort slider. GPT-5.6 went GA 2026-07-09 (Sol $5/$30 per 1M) and OpenAI CUT Luna 80% to $0.20/$1.20 and Terra 20% to $2/$12 on 2026-07-30. On 2026-08-13 OpenAI previewed **Ultrafast**, a Cerebras-powered API tier running GPT-5.6 Sol up to 14x faster (750 output tok/s) -- waitlisted, capacity-limited, and with no pricing published. Also now: Health in ChatGPT (7/23, US) and the ChatGPT Work agent (7/9)
Perplexity AI
AI-powered search engine that gives cited answers instead of a list of links. **Hybrid Compute on Mac shipped 2026-09-01**: Perplexity Computer now splits a single task between cloud frontier models and a compact local model running on the Mac, with an on-device privacy gate that can mask, withhold, refuse or ask for consent before anything leaves the machine
Alexa+
Amazon's reborn consumer AI assistant -- rolls out to every Alexa device with memory, multi-turn agent tasks, and Fire TV navigation
Gemini Notebook (formerly NotebookLM)
Google's free research assistant that turns your documents into an AI you can query -- and a podcast you can listen to. **Renamed from NotebookLM to Gemini Notebook on 2026-07-16**, still a standalone product, now with in-notebook code execution and syncing across the Gemini app and Search. **Expert Intelligence (2026-08-27) makes purchased Play Books ebooks a first-class source**; compute-weighted usage limits took effect 2026-09-02 -- they refresh every 5 hours **but sit under an undisclosed weekly cap**, with AI Plus at 2x standard, AI Pro 4x and AI Ultra 5x or 20x above Pro (Google's help pages still read prospectively and still publish the old daily table -- no delay announced)
Microsoft Copilot
Microsoft's answer to ChatGPT -- free GPT-4 access with Bing search built in, but it feels like a corporate product
Poe
One subscription, every major AI model -- Quora's multi-model chatbot lets you switch between GPT-4, Claude, and more
Siri AI (Apple)
Apple's ground-up Siri rebuild, unveiled at WWDC 2026 (June 8) -- conversational, on-screen aware, searches your personal data across apps, gets its own app with synced history. Built on Apple Foundation Models developed in collaboration with Google's Gemini. Developer betas now; public beta in July; ships this fall with iOS 27. Not in the EU (iPhone/iPad) or China at launch.
Character.AI
AI-character roleplay chat platform -- once 200M+ monthly visitors, now in a prolonged user exodus after the 2026-02-18 'Moderatedpocalypse' mass-delete and escalating TRAIGA-compliance restrictions. The alternatives market (Janitor AI, Chai, DreamGen) is now the real story