Best AI Apps in 2026: I Tested What Belongs in a Real AI Stack

I have five AI apps installed on my phone right now, three browser tabs pinned to AI web apps, and a company card that gets charged for all of them every month. Last week I finally sat down and asked myself the obvious question: if I could only keep one app for an entire workday — research, writing, images, a quick video clip, and one actual agent task — which one would survive?

My name is Artem, I run the Writingmate blog, and testing AI tools against real tasks instead of marketing pages is basically my job. So I picked five apps that all claim to be "all-in-one" — ChatGPT, the Gemini app, Perplexity, Grok, and Writingmate — and ran the exact same workday through each one: a research question that needed live sources, a drafted client reply, a product photo for a listing, a 5-second video clip for a social post, and one agent task that had to actually finish, not just describe what it would do. Here's what broke, what held up, and which apps are single-purpose tools wearing an "AI app" label.

The One Workday I Ran Through Every App

I kept the test deliberately boring, because boring is what actually fills most people's Tuesdays. Five tasks, same inputs, same account tier (whatever the standard paid consumer plan was for each app), run on the same afternoon in September 2026:

• Research: "What changed in the EU AI Act enforcement timeline in the last 60 days, and cite where you got that." I checked whether the answer had working citations, not just a confident paragraph.
• Draft: Turn three bullet points into a client email that doesn't sound like a template.
• Image: A product photo of a ceramic mug on a marble counter, soft morning light, no text artifacts.
• Video: A 5-second clip of the same mug with steam rising, for a Instagram Reel.
• Agent: "Go find the three highest-rated coffee subscription services under $30/month and put them in a table with price, shipping frequency, and cancellation policy." This one had to browse, extract, and format — not just chat about it.

I scored each app on whether the task finished natively inside that app, needed a bolted-on plugin or a separate sibling app from the same company, or wasn't possible at all. Native completion counted as a real win. Needing to open a different app from the same company — even if it's free — counted as a fail for "all-in-one," because that's exactly the juggling this whole test is trying to measure.

ChatGPT: The Closest Thing to All-in-One, But Agents Are Still Bolted On

ChatGPT handled four of the five tasks without leaving the chat window. The research question came back with inline citations from its live search mode, the draft email was genuinely usable after one follow-up prompt, and image generation inside the same conversation is smooth enough now that I stopped noticing it as a separate feature. Video is the newer addition — a short clip generated inside the same thread, though quality on fast, cheap clips still shows the seams if you look for camera movement or hands. The agent task is where it got messy. ChatGPT's agent mode can browse and act, but on my coffee-subscription task it timed out once mid-browse and needed a re-prompt to finish the table, and the whole flow felt like a separate mode grafted onto the chat interface rather than something that shares memory and context with the rest of the conversation. It finished the job. It just took two tries and felt like switching gears, not staying in one app.

Gemini App: Best Search Grounding, But Image and Video Live Somewhere Else

Gemini's strength showed up exactly where you'd expect from a company that owns the search index: the research task came back fast, well-sourced, and current, and Gemini's ability to pull from Google's own index gave it a slight edge on recency over the others. The draft email task was solid too — nothing surprising, just competent. Where it fell apart for "one app" purposes: asking for the product image inside the Gemini app routed me toward a separate image generation surface, and the video request pointed me at yet another dedicated video tool. Both are technically "Google AI" products and both are genuinely good at what they do, but they're not the same app experience — different UI, different history, different place to find your last output. If you're trying to avoid juggling apps, having your chat, your images, and your video split across three different Google surfaces doesn't actually solve the juggling problem, it just consolidates the billing.

Perplexity: The Best Researcher in the Room, Thin Everywhere Else

No surprise here — Perplexity's whole reputation is built on search, and it earned it. The EU AI Act question came back with the cleanest source list of any app I tested, each claim tied to a specific citation I could click through and verify. If research is 80% of your day, Perplexity is genuinely hard to beat. But the draft email came back stiffer and more generic than the other four apps, image generation exists but feels like an afterthought bolted onto a search product, there's no native video generation at all, and the agent-style "tasks" feature is newer and narrower than what ChatGPT or Writingmate offer — it handled a simplified version of the coffee-subscription task but couldn't format the comparison table the way I asked without manual cleanup afterward.

"Perplexity for research, ChatGPT for everything else, that's basically my whole workflow at this point. Wish one of them just did both well." — u/data_hoarder_22 on Reddit

Grok: Fast and Sharp on Chat and Images, Not Built for the Rest Yet

Grok surprised me on the draft email — it's quick, has a distinct voice if you want one, and the underlying model handled the research question competently when I toggled on its search mode, pulling from X posts as well as the open web, which occasionally caught a detail the others missed. Image generation is also a genuine strength; the mug photo came out clean on the first try. Video generation and agent tasks are where Grok is still catching up. There's no native short-clip video generator built into the same chat surface I was testing, and the "agent" behavior I could trigger was closer to a longer, more thorough chat response than something that actually went and built the comparison table on its own. For a chat-and-image workflow, Grok holds its own. For the full five-task stack, it's not there yet.

"Ran the same prompt through Grok and GPT side by side for images. Grok nailed it in one shot, GPT needed three tries. But GPT's agent mode actually finished my task end to end and Grok's just... talked about it." — @aivisionary on X

Writingmate: One Login, One Price, All Five Tasks Finished Native

This is the app I actually work in day to day, so I ran it last and tried hardest to find where it would break. It didn't, on this particular workday. The research question ran through Writingmate's built-in AI Search, which returned sourced citations comparable to Perplexity's. The draft email ran through whichever chat model I had selected — I used Claude for that one, since drafting tone is where it tends to edge out — and switching models mid-conversation without losing context is the one habit from using Writingmate daily that makes going back to single-model apps feel restrictive. The product photo generated through the built-in image tool in one pass, the video clip rendered through the video generator without switching apps or tabs, and the coffee-subscription agent task ran through a custom agent that browsed, extracted the three services, and returned a formatted table on the first pass — no retry needed. The honest caveat: Writingmate isn't the single best tool at any one of these five tasks individually. Perplexity's citations are marginally cleaner, Grok's images are marginally faster, and a dedicated video app will out-render its clip quality on a longer, more ambitious shot. What it doesn't make you do is open four other apps and pay four other subscriptions to get "good enough" at all five.

The Capability Breadth Scorecard

Here's how the five-task workday shook out across each app, scored on whether the task finished natively in that same app without switching to a sibling product or a plugin:

App	Chat / Draft	Image	Video	Search w/ Citations	Agent Task
ChatGPT	Native, strong	Native	Native, rough edges	Native	Native, needed 2 tries
Gemini App	Native, strong	Separate app	Separate app	Native, best recency	Limited
Perplexity	Native, generic	Native, thin	Not available	Native, best sourcing	Native, needed cleanup
Grok	Native, strong	Native, fast	Not available	Native, via X	Limited
Writingmate	Native, model choice	Native	Native	Native	Native, one pass

Two apps came out with all five boxes checked as native: ChatGPT and Writingmate. The difference between them on this particular workday was consistency on the agent task and the ability to pick a different underlying model for the drafting job without leaving the thread — small things individually, but they're exactly the things that decide whether you keep one app open all day or start reaching for a second tab.

What Actually Belongs in a Real AI Stack

If your job is 90% research and citations, don't force yourself off Perplexity — it's the best tool for that one job. If you live in X and want chat plus fast images, Grok covers that comfortably. But if you're trying to answer the actual question this test started with — which single app do I keep if I can only keep one — the honest answer is whichever one finishes all five tasks without kicking you out to a sibling product. On this test, that was ChatGPT and Writingmate, and the deciding factor for me personally was model choice: being able to run the draft through Claude, the research through a search-tuned model, and the agent task through whichever model handles tool calls best, all inside one account, is worth more to me than any single app being the single best at one narrow task. You can compare that model breadth directly on the Writingmate models page and check current plans on the pricing page before deciding if consolidating is worth it for your own workday.

One thing worth testing yourself before you commit to any single app: run your own actual Tuesday through it, not a demo prompt. The gap between "looks good in a screenshot" and "finished the real task" is where most of these apps quietly fail.

Five apps, one workday, and only two of them made it through chat, image, video, search, and an actual agent task without sending me to a different app halfway through. If you're deciding what to keep, start by running your own messiest real task through whichever app you're considering — not a demo prompt — and see if it finishes the job or just talks about finishing it. See you in the next one! Artem