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
**ChatGPT for Word arrived 2026-09-17 on every plan including Free** (Word joins Excel and PowerPoint in the same Microsoft add-in, drawing on the shared Codex usage allowance), plugins can now hold multiple accounts, and on 2026-09-21 Finances gained **Experian credit-score tracking** (Plus/Pro, US) plus a Privacy Center for Free/Go/Plus/Pro. **Astra for Law launched 2026-09-17** -- GPT-6 Astra configured for legal work with a 230M-URL legal search index and 26 partner-built legal plugins, offered first to selected law firms through Trusted Access in ChatGPT and Codex as 'GPT-6 Astra Law' (API id gpt-6-astra-law 'coming soon', no price published). **ChatGPT Images 2.5 shipped 2026-09-08** to every tier (Sketch, templates, up to 50% lower latency; API twins GPT-Image-2.5 Flare and Sunburst at the same $8/$30 per 1M as gpt-image-2), and on 2026-09-16 OpenAI began testing **Sponsored Agents** inside ChatGPT Ads with HubSpot and Shopify integrations, published a **misalignment-reporting framework** with six incident reports, and shipped usage and outcome analytics for ChatGPT Work and Codex admins. 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
**Perplexity disclosed on 2026-09-21 that Computer sessions are served by GLM 5.2** (Z.ai's open-weight model) and that it post-trains its own checkpoints on real user sessions -- the trained model becomes a model option in Computer, and the latest checkpoint cut live tool-call failures 21.2% relative. **Computer gained effort controls on 2026-09-17** (a Light/Standard/High/Ultra slider that picks the model and reasoning level, web first), and **HP began pre-loading the Perplexity Windows app on 2026-09-15** starting with the ZBook Ultra G3a. **Portable Computer -- the local, on-device version of Perplexity Computer -- reached Windows on 2026-09-14** for GeForce RTX / RTX PRO GPUs with 24GB+ VRAM, running a Qwen 3.8 27B post-trained for Computer, with locally completed work not consuming Computer credits (confirmed in Perplexity's own post: Pro and Max on individual and enterprise plans; the Qwen 3.8 27B model name is NVIDIA's statement). 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