Claude Opus 5.5 Is Here and It's INCREDIBLE

0:00Anthropic just released Claude Opus 5.5 [music] and it is by far the best model to use for anything from studies to hardcore coding. And in this video, I'll test it against GPT-6 and Fable 5.1 to see if it's worth using or if it's just hot. And I'll start off with a test where I give it almost no direction at all. So in Claude code, I asked Opus 5.5 to build any simulation it wants as one HTML file that runs offline with no libraries. What it builds is completely up to the model and the only rules I gave it are that it has to look good and

0:42that I can control what's happening. And before we get too far, all the prompts I'm using in this video are free in the description so you can run the same tests yourself. It built this firefly simulation called Firefly Unison as an artifact. So I'll open it up and right away I've got a lake full of fireflies blinking at night. The right sidebar has a ton of controls from the experiments and the population to the tempo, the flash pattern, and even the color. I'll push the population all the way up to 4,000, switch the color to bluish tint, then speed up tempo, and every change shows up instantly. Turning the

1:23individuality all the way up gives every firefly a different rhythm so there's a lot more happening across the lake. And if I tap [music] on the water, glowing ripples spread out from where I clicked while the graph in the bottom left corner tracks how synced the whole swarm is. It also tested the simulation itself and slowed down how fast the fireflies sync up so it doesn't all happen at once. For reference, I gave the same prompt to GPT-6 Astra and Fable 5.1. And Astra built a galaxy simulation while Fable built a slime mold, one with up to 2 million agents. Both are just as controllable and fun to mess around

2:03with. So, on this test, the three of them are right on par. Also, [music] if you want to use AI beyond tests like these, my school community AI Fluency takes you from casually using ChatGPT to building real projects with AI in 12 weeks. You get a new video every day for 3 months, over 1,000 for your resources, and direct help from me and my team inside the community. So, go ahead and join us using the link down in the description below. Now, our next test is going to be much heavier. In a new chat, I asked it to make a realistic ray traced simulation of a bullet going

2:43through a water balloon. And this one is pretty fun because it's run for almost 5 hours, filled up its whole 1 million token context window, and still couldn't finish. But even unfinished, it built this thing called burst point, and [music] it looks super realistic. The bullet tears through the balloon, the latex peels away, and the water splashes down onto the floor. And the panel on the right actually does the math, showing the bullet slow down from 150 to 105 m/s on its way through. I can switch between camera angles like hero, side, chase, and floor, and even set the focal length, the aperture, and the shutter

3:26speed of 1/100,000 of second. For the shot itself, there's a list of real rounds with their actual weights from a tiny air pellet up to the .45 ACP FMJ. So, I'll pick that one and set the slow motion to four times. The balloon comes in six colors, and I can change its size, how thick the latex is, and how far it's stretched. And on top of that, there are gravity presets from the moon, Mars, [music] and Jupiter. Plus, the water surface tension, its viscosity, and the whole lighting section. If anything, it went a bit overboard with the controls. I ran the exact same test on Fable 5.1 and GBT6 Astra, and even

4:09though they give you a lot of similar controls and looks, Opus 5.5 was much better here. Fable's version was not that realistic, and Astra's was missing a lot of the controls and didn't look as good, either. [music] So, Opus 5.5 is on par with Fable and Astra, and on the hardest test, it bet both of them without even finishing. But, a simulation only has to look good, and a game actually has to work while you're playing it. So, next, I asked it for 60-second time loop game, where every time the loop restarts, an echo of me repeats exactly what I did the round before. The goal is to grab an item from

4:51the vault and make it back to the exit before time runs out. And [music] the catch is I can't do it on my first try. Opus 5.5 called its version Echo Vault. Using my keyboard, I'll go from the exit, jump up to the second floor, and stand on this hatch plate, which opens the gate. Then, press Q to end the loop. As the next loop starts, my echo works the exact same path, and the moment it stands on the plate, the same gate opens. So, I can walk right through and press Q again. The game keeps going like this until I reach the vault at the top,

5:26grab the core, and get out. Functionality-wise, Wolfram models' games are the same, and Astra's looks a little cooler, while Fable 5.1's just doesn't look as good. But, Opus 5.5 did the best job of balancing the looks with controls that stay simple and easy to understand. And that's a lot of coding so far, but the writing was one of the biggest complaints about Opus 5. So, for our next test, I'm going to see just how good Opus 5.5 is at writing. Inside Cowork, I gave it a journaling course I made up called Plain Pages, which means I know every little fact about it and can catch anything the model adds or

6:08exaggerates. The prompt explains how I write, the only facts it's allowed to use, and the full launch it has to build from a 4-minute VSL to 12 emails over 14 days. And to make it a little harder, I asked for all of it inside one HTML document. It built me a dashboard with every part of the launch on one page. It made its own calls on the schedule, too, like leaving days 3, 9, and 12 without an email, and timing the VSL to 4 minutes at a normal speaking pace. It still has some AI tells in it, but it's honestly not that bad. And in the

6:47emails, I don't really like the subject lines, but the bodies themselves are pretty good. As a bonus, Astro's dashboard was cleaner, but its copy felt basic, and Fable 5.1 wrote better subject lines, although both still need a copywriter to go through them to actually make something usable. But Opus 5.5 is definitely much better at writing than its predecessor, Opus 5. And writing is only one of many creative tasks. So, next, I want to see how it handles design. In Cowork, I asked it to open Chrome, find five personality design thriller movie posters, and study them. Then, turn one ordinary photo into an original poster in Canva. I gave it a

7:31title, a tagline, and the credits, uploaded a random picture of a guy from Unsplash for it to edit, and told it to start from a blank canvas with no template and no Canva AI. It's not super detailed or illustrative, but considering it did everything by clicking through my browser and adding multiple visual effects on its own, I really like it. And as a bonus, it even made up names for the small credits, so the poster looks real. But a poster is just a single frame. So for the final test, I wanted to see if it could make a whole 3D video from scratch, and this is

8:07the one I was most excited about. In Cloud Code, I asked it to make a 22-second 3D animation with Remotion, which builds videos out of nothing but code. So no Blender, After Effects, or any other creative app. The idea is simple. A book drops out of the sky, hangs in the air for a second, flips through its pages, and then the pages scatter [music] and build a miniature city. I gave it a long list of rules for how every part should look, so I was curious to see how it would handle all of that on its own. And my PC didn't even have the tools it needed. So before

8:45doing anything else, it downloaded and set them up by itself. So let's open the folder it gave me and watch the video.

9:15And this is one of the most impressive things I've seen Opus 5.5 do so far, because this kind of task is usually way beyond what AI can handle. It got exactly the book I had in mind, and the camera angles as the page scatter and turn to the city are my favorite part. By the end, 376 pages folding to roads, buildings, towers, and bridges of that city. To get there, it rendered test frames, checked them, and did three rounds of fixes on its own, including one for a bug that made every single page invisible. It's not perfect because the back cover and

9:55the spine don't quite match the front. The official listing only had the front cover, so it has to design the rest itself. But, I still really like it. And to be honest, I thought Opus would fail this one, and it went way beyond what I expected. So, after all these tests, Opus 5.5 is definitely not just hype. It does exactly what Anthropic promised, Fable 5.1 level of results for a lot less money, and in a few of these tests, it did even better. The only thing to watch is really long jobs, like the ray tracing one from before, but for almost everything else, it's the model I'd pick

10:35right now. And Opus 5.5 is only as useful as what you do with it. So, inside my school community, AI Fluency, I show you how to build real projects with tools like this. You get 12 weeks of step-by-step lessons with me [music] and my team there to help. Join through my link in the description to get it at

10:53$96 a month before the price goes up. Thanks for watching, and I'll see you in the next one.