We put the six most-used AI assistants on the same bench, gave them the same prompts, and timed the same tasks. Here's which one deserves your $20 a month, and which one to pick for the job you actually have in front of you.
We're settling the "which AI chatbot should I actually pay for" question with a real test bench instead of a vendor deck. We took the six most-used general-purpose assistants (ChatGPT, Claude, Gemini, Perplexity, Microsoft Copilot, and Grok), signed up for the paid plan a normal person would buy (the $20-a-month tier, or the closest equivalent), and ran them all through an identical set of tasks: everyday writing, long-document analysis, coding, math and reasoning, real-time research with citations, and multimodal work with images and files.
Every score below is something we tested, not a vibe. We ran the same prompts through each tool in the same week, blind-rated outputs where quality was subjective, timed the ones where speed mattered, and read every provider's current pricing page to make sure the cost figures are what you'd actually be charged today. Here's how each one held up, category by category.
How We Tested
Everyday writing
We ran 30 identical writing prompts through each chatbot (five blog intros, five marketing emails, five LinkedIn posts, five explainer paragraphs for a general audience, five short-story openings, and five 'rewrite this in a friendlier tone' passes over a stiff HR memo) then blind-rated the outputs in batches of six for naturalness of sentence structure, absence of AI clichés (opening with 'In today's fast-paced world,' rocket emojis, 'delve into,' 'unlock'), and how well the tone matched the brief.
Reasoning & coding
We gave each tool the same 25-problem set: 10 competition-style math problems, 10 code tasks in Python and TypeScript (fix a failing test, refactor a 200-line file, write a small CLI from spec), and 5 multi-step logic puzzles. Each was submitted once with default settings and once with the tool's 'thinking' or 'reasoning' mode enabled. We scored the share that produced a correct, runnable, or provably-right answer on the first try.
Long-document analysis
We uploaded the same three documents to each tool (a 180-page annual report, a 90-page legal contract, and a 40-page academic paper) and asked five identical questions per document, including two that required cross-referencing information from opposite ends of the file. We scored answers on accuracy against the source (verified by hand), citation precision, and whether the tool caught contradictions we'd deliberately planted.
Real-time research
We ran 20 queries that required live web information (news from the past 48 hours, current stock prices, sports scores, in-progress product launches) and 20 that needed synthesis across multiple sources ('compare the three most-cited studies on X and tell me where they disagree'). We scored the share of answers that were factually current, cited real and verifiable sources, and did not hallucinate a URL.
Speed
On a fixed 400-word prompt with no reasoning mode enabled, we measured wall-clock time from send to first-token and send to full completion, averaged over 25 runs per tool during the same off-peak evening on the same 500 Mbps connection so latency couldn't unfairly favor anyone.
Cost & value
We priced the plan a normal working professional would actually buy (the $20-ish paid consumer tier) against what you get in return: which flagship model you reach, the daily and weekly message caps we hit in a full week of heavy use, and which of the bells and whistles (agent mode, deep research, image generation, memory, file uploads) are gated to higher tiers. Any tool whose sticker price hid a required extra subscription got docked.
Ecosystem & integrations
We scored each tool on how well it slotted into a real working stack: native connectors to Gmail/Docs/Drive or Outlook/Word/Excel, browser and mobile apps that actually work, custom GPTs or projects for saved workflows, and how much friction it took to hand a document from another app over to the assistant. Points off for anything that required a second subscription to be useful.
1
ChatGPT Plus
by OpenAI
Editor's Choice
9.2/10 ★★★★ ⯪
Still the one to beat as a general-purpose assistant. GPT-5.6 Sol is the most versatile model on the market, and the feature depth at $20 a month is genuinely hard to match.
Best for: Most people
Why We Like It
- Flagship GPT-5.6 Sol model plus Deep Research, agent mode, Codex, and image generation in one $20 plan
- By far the deepest ecosystem of custom GPTs, plugins, and community prompt libraries
- Voice mode is noticeably more natural than any competitor's
Watch Out For
- Auto model routing means an easy prompt may not actually reach the flagship model you're paying for
- Free tier now shows ads in the US, and the plan ladder is the most confusing in the category
How It Scored
Everyday writing 8.4
Reasoning & coding 9.4
Long-document analysis 8.8
Real-time research 8.8
Speed 9.0
Cost & value 9.4
Ecosystem & integrations 9.8
2
Claude Pro
by Anthropic
Best Value
9.1/10 ★★★★ ⯪
The writing and long-document champion. If you care about how the output actually reads, or you work with large PDFs and codebases, this is the one to pay for.
Best for: Writers, analysts, and developers
Why We Like It
- Best-in-class prose quality. Sonnet 5 and Opus 5 sound the least like AI of any model we tested
- Follows long, complicated prompts with numbered constraints more faithfully than anything else
- Claude Code and Claude Cowork bring the same model into your terminal and desktop files
Watch Out For
- Daily message caps on Pro can bite hard if you're using Claude all day
- No native image generation; you'll need a separate tool for that
How It Scored
Everyday writing 9.6
Reasoning & coding 9.2
Long-document analysis 9.4
Real-time research 8.2
Speed 8.6
Cost & value 9.0
Ecosystem & integrations 8.4
3
Google AI Pro (Gemini)
by Google
Best for Beginners
8.8/10 ★★★★ ☆
The pick if your work already lives inside Google. Gemini 3.1 Pro is genuinely strong, and having it inside Gmail, Docs, and Drive removes the copy-paste tax.
Best for: Google Workspace users
Why We Like It
- Gemini 3.1 Pro with a 1M-token context window at $19.99/month is the biggest context per dollar on this list
- Deep integration with Gmail, Docs, Sheets, Drive, and Calendar with no context-switching
- Plan includes 2 TB of Google One storage, which quietly changes the value math for existing Google users
Watch Out For
- Aesthetic defaults and prose style are a step behind Claude and ChatGPT
- US-only for several of the most interesting Ultra features (Deep Think, Gemini Spark, Gemini Agent)
How It Scored
Everyday writing 8.2
Reasoning & coding 8.8
Long-document analysis 9.4
Real-time research 9.0
Speed 9.2
Cost & value 9.2
Ecosystem & integrations 9.4
4
Perplexity Pro
by Perplexity
Researchers, analysts, and journalists
8.5/10 ★★★★ ☆
Not a ChatGPT replacement, a fundamentally different tool. If your job is research, fact-checking, or anything that needs cited sources, this is the specialist to keep alongside your main chatbot.
Best for: Researchers, analysts, and journalists
Why We Like It
- Every answer is grounded in live web sources with numbered inline citations you can verify
- One subscription routes queries across GPT-5.6, Claude Opus 5, Gemini 3 Pro, and more
- Premium Sources gives Pro users access to normally paywalled data from Statista, PitchBook, and CB Insights
Watch Out For
- Weaker than the generalist chatbots at creative writing, longer coding, and anything not research-shaped
- The best features (Model Council, Perplexity Computer, Labs) really shine on the $200/month Max tier
How It Scored
Everyday writing 7.8
Reasoning & coding 8.2
Long-document analysis 8.8
Real-time research 9.8
Speed 8.8
Cost & value 9.0
Ecosystem & integrations 8.2
5
Microsoft 365 Copilot (Premium)
by Microsoft
Microsoft 365 households and small businesses
8.2/10 ★★★★ ☆
The right pick if your day already runs on Word, Excel, Outlook, and Teams. Runs on OpenAI models but wins on how deeply it sees the work you already do.
Best for: Microsoft 365 households and small businesses
Why We Like It
- AI drafting and analysis embedded directly in Word, Excel, PowerPoint, and Outlook
- M365 Premium at $19.99/month bundles the AI features with the full Office suite and up to 6 TB of storage
- Business tier can ground answers in your organization's email, files, and meetings via Microsoft Graph
Watch Out For
- The web chat experience is a step behind ChatGPT and Claude for open-ended tasks
- The standalone $20 Copilot Pro is being retired, and the work version is a $30/user add-on on top of a Microsoft 365 base license
How It Scored
Everyday writing 8.2
Reasoning & coding 8.0
Long-document analysis 8.2
Real-time research 8.0
Speed 8.4
Cost & value 8.6
Ecosystem & integrations 9.2
6
Grok (SuperGrok)
by xAI
Heavy X users and trend-watchers
7.6/10 ★★★ ⯪ ☆
The specialist for real-time X and social context, and not much else. Priced $10 above the pack for reasons that only pay off if you live on X.
Best for: Heavy X users and trend-watchers
Why We Like It
- Real-time X and web search built in, with DeepSearch for live research and Big Brain mode for extended reasoning
- Grok Imagine gives you native image and video generation inside the same subscription
- Grok 4.5 posts genuinely strong benchmark scores when you reach it
Watch Out For
- No persistent memory between sessions on any tier, including the $300/month Heavy plan
- $30/month is $10 above ChatGPT, Claude, and Gemini for a narrower, chattier product
How It Scored
Everyday writing 7.4
Reasoning & coding 8.2
Long-document analysis 7.2
Real-time research 8.4
Speed 8.4
Cost & value 6.8
Ecosystem & integrations 7.2
What changed this year
Two things are worth knowing before you pick. First, the “just use ChatGPT” default answer is finally cracking. ChatGPT still leads, but the gap has narrowed considerably. ChatGPT, which once held 87% market share, has dropped to around 68%, Google Gemini surged from 5% to 18%, Claude quietly captured 29% of the enterprise market, and Perplexity built a loyal following among researchers and analysts who need cited, verifiable answers. Every one of these tools has now found a specific job it does better than the others, and picking the wrong one for that job shows up in the quality of your work.
Second, the flagship models moved in lockstep this summer. GPT-5.6 (Sol, Terra, Luna) reached ChatGPT on July 9, 2026, putting the new flagship GPT-5.6 Sol in front of Plus, Pro, Business, and Enterprise users. Claude Sonnet 5 is now the default model for Free and Pro plans, and Anthropic launched it at an introductory price of $2 per million input tokens and $10 per million output tokens through August 31, 2026. On the consumer side, the Google ladder now runs Google AI Plus at $4.99 per month, Google AI Pro at $19.99, and Google AI Ultra from $99.99. The result: for the first time, the four biggest consumer plans all cost roughly the same $20, and the decision is genuinely about which model fits your work.
Who each one is for
Pick ChatGPT Plus if you want one assistant that does almost everything well. Plus at $20 a month is the plan most working professionals want. It unlocks the GPT-5.6 flagship, Sol, in regular ChatGPT and the full Sol / Terra / Luna family in Codex, along with advanced image creation, expanded memory across chats, the Codex coding agent, the Work agent for multi-step tasks, expanded deep research, and Projects and custom GPTs. Nothing else at this price gives you as much surface area.
Pick Claude Pro if the quality of the writing matters. Claude produces output that sounds like a human being wrote it. The sentence structures vary, the tone adjusts naturally to what you asked for, it doesn’t repeat phrases, it doesn’t over-explain, and when you give it a complex prompt with specific formatting requirements, numbered constraints, and edge cases, it honors all of them. Other models sometimes drop requirements from long prompts; Claude rarely does. If your job is words, this is the one to pay for.
Pick Google AI Pro if your work runs on Google. Google AI Pro at $19.99 is arguably the best-value AI subscription: same price as ChatGPT Plus but with 5 TB of storage and deep Workspace integration. The tax you pay in prose polish is worth it if it means the AI is already sitting inside the tools you use all day.
Pick Perplexity Pro alongside one of the above, not instead of it. Pro features include unlimited file uploads (up to 40MB per file, supporting PDFs, images, audio, and video), API credits for developer experimentation, priority support, and advanced image generation using models like Nano Banana and Seedream 4.5. Pro users also get access to Premium Sources, which means Perplexity can pull data from normally paywalled providers like Statista, PitchBook, and CB Insights. A single subscription to any of those services would cost hundreds per month on its own. That’s the case for keeping Perplexity in your stack even if it isn’t your primary chatbot.
Pick Microsoft 365 Copilot if you already pay Microsoft. For new sign-ups, Microsoft 365 Premium is the consumer plan that carries Copilot Pro’s features forward. Microsoft 365 Premium at about $19.99/month bundles what Copilot Pro offered (AI in Word, Excel, PowerPoint and Outlook, priority model access and higher usage limits) together with the Microsoft 365 apps and up to 6 TB of storage. If you were going to renew M365 anyway, the AI is essentially bundled.
Pick Grok only if you live on X. SuperGrok costs $30/month or $300/year and is the cheapest standalone path to full Grok; Grok 4.5 is rolling out to this tier in stages after its July 8, 2026 launch. That’s $120 a year more than the alternatives, for a narrower product. Grok still has no persistent memory between sessions at any price tier, including the $300/month SuperGrok Heavy plan. If memory and continuity across conversations matter to your workflow, ChatGPT or Claude handle this significantly better.
A note on the free tiers
You don’t have to pay to try any of these. All major chatbots now offer genuinely useful free tiers: ChatGPT free includes GPT-5.3 (with ads in the US since February 2026), Claude free provides access to Claude Sonnet with daily limits, Gemini free includes the Gemini 3 model with Google Workspace integration, Perplexity free provides unlimited basic searches with citations, and DeepSeek free gives full V4 Pro access via web chat at no cost. For users averaging fewer than 10 queries daily, free tiers cover most needs. Paying for a subscription only makes sense if you hit limits regularly or need specific features like extended memory, higher context windows, or advanced reasoning models. Start with the free tier of whichever tool you’re leaning toward, run it against a week of your actual work, and only pay when you hit the wall.
