😺 Our HONEST review of Perplexity Comet...

Welcome, humans.

Okay y’all. We’ve had a week to vibe check. How are we feeling? Are we team GPT-5 or GPT-4o? Did OpenAI cook with this one, or did they break the cardinal rule of if it ain’t broke, don’t fix it? Let us know below and we’ll share the results on Monday!

Real talk: How are we feeling about GPT-5?

Are you team GPT-5 or 4o? Or something else?

P.S: Should we turn the poll results in our own “leaderboard”? We can call it “Neuron-Reader-Bench.” Ooh, ooh, no even better: we can call it: “The Readerboard!”

Here’s what happened in AI today:

• We give Perplexity Comet, the new AI browser, a test drive.
• Claude Code added teaching modes that explain coding and let users practice.
• Google released Gemma 3 270M, a small AI model for specific business tasks.
• AI created new compounds to fight drug-resistant bacteria.

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We tested Comet, a browser that actually does your work for you

The web browsing experience hasn't changed much since 2008—endless tabs, basic search, and you doing all the clicking. Well, this week, Perplexity announced that Comet, the AI search company’s new AI browser, is now rolling out to all US-based Pro subscribers, with global expansion planned weekly until it's available to all Pro users worldwide. Max subscribers get an exclusive “Max Assistant” mode that's more reliable and powerful for complex tasks.

Max flips the script on the O.G. web browser entirely. Instead of just showing you web pages, it can read them, click buttons, fill out forms, and even make purchases while you watch.

Think of it as Chrome with a built-in personal assistant that never gets tired of mundane tasks.

Early users on Reddit have been torn about Comet: one reviewer watched it automatically delete emails and felt “impressed and unimpressed at the same time”—it worked, but they could've done it faster manually. Others called it “slow and laggy,” while some made it their default browser entirely.

With reviews this mixed, we had to vibe check it ourselves.

Here's what makes Comet different:

• It operates the web for you: Plans road trips with specific stops, accepts LinkedIn requests, unsubscribes from emails, and books restaurant tables
• Chrome extensions just work: Your password manager, ad blocker, and other tools transfer over seamlessly
• Research becomes conversation: Instead of opening 20 tabs, you ask questions and get structured answers with sources
• Widget-based interface: Contextual panels that appear when needed, disappear when they don't

The coolest part? You can organize your browser tabs with a simple prompt. No more tab chaos.

In our experience, the Reddit reviews aren’t fast off: it's genuinely faster than doing tasks manually, so long as you’re multi-tasking and letting it cook in the background, though some complex workflows still have hiccups—which TBH, is expected for a beta release.

The sweet spot seems to be repetitive tasks across multiple sites—data collection, research workflows, anything you'd normally do manually 10+ times (and that you can autopilot while you do more intellectually challenging work).

Why this matters: Browsers have been glorified document viewers for decades. Comet (and fellow AI browser Dia, which we’re itching to get our hands on to test…) represents the first serious attempt at a browser that's also a capable operator. If this approach catches on (and early signs suggest it will), we might finally escape the endless tab-juggling that defines modern web browsing and get a more reliable, relaxing way to surf the web with an always-on assistant who can handle the manual.

Let’s also not forget: OpenAI is cooking up its own browser plans, too, which based on some new leaks, will allow you to finally use ChatGPT Agent on your own computer (and not some instance spun up in the cloud managed by OpenAI).

Both Perplexity and OpenAI have been interested in possibly buying not only their rival Dia (owned by The Browser Company), but Google Chrome (if it’s spun out of Google by the DOJ).

Read Corey’s full review on the website here.

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Prompt Tip of the Day.

We were messing around with GPT-5 Pro this week, and we figured out something important: if you want to use GPT-5 Pro to say, fetch and consider the context of a specific url, you need to limit the amount of URLs you share with it to 8-12 (call it 10).

GPT-5 Pro revealed (as part of its thinking process) that it gets hung up after about 12 searches (it runs out of queries, so to speak), so if you need it process a lot of context from many different links, make sure to do that in batches of 10 links.

For example, try something like this:

Also, we’re hearing that GPT-5 is really sensitive to everything that gets between it and its end goal, so if you have excess memories, custom instructions, project instructions, or anything else you don’t want GPT-5 to consider as part of its work, then remove them before you run your next prompt, cause otherwise, it’ll follow all of its instructions.

Treats to Try.

*Asterisk = from our partners. Advertise in The Neuron here.

1. *Spinach AI records, transcribes & summarizes your meetings, then automatically updates your CRM and project tools.
2. Framezero turns your sketches into animated videos right in your browser—draw some code, add transitions, export in 1080p.
3. Anything turns your app ideas into working mobile and web apps just by describing them in chat (though we’d heard lots of folks prefer Rork).
4. Macaron builds you personalized life tools (like fitness planners and meal guides) that remember your preferences and grow with you over time.
5. Cohere's new North platform lets you deploy AI agents behind your company's firewall to automate workflows in regulated industries (raised $500M).

Around the Horn.

• Claude Code now teaches you coding by explaining its decisions step-by-step or pausing to let you write parts of the code yourself: Explanatory explains its reasoning step-by-step, and Learning pauses to let you code parts yourself like pair programming with a mentor (details).
• Google released Gemma 3 270M, a tiny AI model you can train for specific tasks like analyzing customer feedback or extracting data from documents.
• Ai2, which builds fully open AI models like OLMo and Molmo, just received $152M from NSF and NVIDIA to create a national AI ecosystem that accelerates scientific discovery

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Intelligent Insights

1. Bessemer's new State of AI report found two winning AI biz archetypes: explosive “Supernovas” ($125M ARR in 2 years, 25% margins) vs more sustainable “Shooting Stars” ($100M in 4 years w/ 60% margins), and predicted browsers will dominate agentic AI and memory & context will replace traditional moats.
2. This report comes amidst the largest wealth creation spree in recent history, that's produced 498 AI unicorns worth $2.7 trillion and minted dozens of new billionaires.
3. What’s the strongest AI model you can train on a laptop? Probably this one.
4. Want to see how a “blind” AI model visualizes the Earth? Then you gotta check out this new blog post from Henry and his new AI as cartographer eval.
5. Confused how to feel about GPT-5? Same. Here’s two takes: first from Timothy B. Lee, who argues it’s both a “phenomenal success” AND “underwhelming failure” that was destined to disappoint, while Azeem Azhar and Nathan Warren break down the five paradoxes of GPT-5 (like moving goalposts for intelligence, fewer drops in reliability that become more noticeable, and its ability to “benevolent control” us).
6. Researchers used two different genAI processes to create new compounds that combat two different kinds of drug-resistant bacteria (paper)…oh, and here’s another example of using AI to create new peptide drugs that can target and break down disease proteins.

A Cat’s Commentary.