Kimi K3 Just Beat Fable 5 And GPT-5.6?

[00:00:00]Kimi K3, just beat Fable 5 and GPT 5.6.

[00:00:04]What if the best model right now isn't from a lab you'd expect? A brand new open model just dropped and it's going straight at the biggest names out there.

[00:00:11]Did it really beat Claude Fable 5 and GPT 5.6 so? I tested it myself. The results surprised me. Stick around because this one is wild. I'm the digital avatar of Julian Goldie and I help you learn and actually use AI tools in your work, not just talk about them.

[00:00:24]Use them. Today, I put three of the top models head-to-head. Kimi K3, Claude Fable 5 and GPT 5.6 so. I run all three side-by-side inside my Agent OS and I gave them the same test. By the end of this, I'll show you which one I'd pick and the exact setup I used to run them all together. Let's get into it. So, here's the lineup. Kimi K3 just came out from a lab called Moonshot AI. It's open. It's huge and people are saying it's right up there with the top models in the world. Then we have Claude Fable 5, which was my favorite before this, and GPT 5.6 so from OpenAI. All three, same tasks, same conditions. Here's why this matters to me. I run all three of these models inside my Agent OS and the first thing I did was use them to draft a full content series designed to bring more people into the AI Profit Boardroom. I fed in a list of topics AI Profit Boardroom members keep asking about and let the models write the hooks, the scripts, and the captions in one go. That kind of content is exactly what pulls the right people into the AI Profit Boardroom. So, this wasn't just a fun test for me. It was real work. Let's kick it off with a Skyrim-style open-world game. I asked all three to build one. Kimi K3 nailed it. The sky, the light, the details, it all felt smooth. You walk into the village and little screens pop up showing where you are. It just looked cool. Claude Fable 5 did a great job, too. Honestly, the mood of the Fable 5 one felt a touch nicer, even if the first character was a little buggy in parts. Then GPT 5.6 so, not bad, but the buttons were backwards. I pressed forward and the character goes back. So, on the first test, K3 and Fable 5 were the clear winners. Next up, a game I test all my agents with called Dragon Realm. This is where K3 really showed off. Snow falling, wild graphics, a proper looking dragon flying around.

[00:02:04]I've never seen one of my AI test produce a dragon like that before.

[00:02:07]Moving around was easy, too. Claude Fable 5 felt more basic this time, and I'll be honest, K3 beat it here. GPT 5.6 Soul actually did a bit better than Fable 5, mostly because it added enemies and made the gameplay more interesting.

[00:02:21]So, K3 took the win on detail and mood.

[00:02:23]GPT 5.6 Soul made it more fun to play, and Fable 5 struggled a little on this one. Then we had a racing game. Same thing again. The one from Kimmy K3 looked awesome. Great colors, nice vibe, and that smooth feel I kept noticing on every single test. Claude Fable 5 wasn't bad, but it looked a bit more blocky and simple. GPT 5.6 Soul looked cleaner than Fable 5, but there was nothing to dodge.

[00:02:44]The gameplay felt flat, and it slowed down a bit. So, K3 took that one, too.

[00:02:47]After that, a neon city driving game.

[00:02:49]And this is where K3 pulled even further ahead. It looked insane. Fun to drive, packed with detail. All the little city blocks lit up. Claude Fable 5 felt like a generation behind here. GPT 5.6 Soul was okay, better than Fable 5, but still not on the level of K3. At this point, I could see a pattern forming. K3 kept coming out on top on the visual stuff.

[00:03:08]Then a crypt game that plays more like a maze. Nice lighting, nice details from K3. Claude Fable 5 was more linear, but a bit buggy and kept breaking during the test. GPT 5.6 Soul edged out Fable 5 again on gameplay. So, the pattern here was clear. K3 for graphics, GPT 5.6 Soul for gameplay. And here's the honest part. On one of the crypt runs, K3 actually failed, and I had to regenerate it. So, it's not perfect. No model is.

[00:03:32]Now, before I show you the failures in the simulations, let me talk about the setup, because this is the part people keep asking me about. If you want the exact system I used to run all three of these models side by side, I've built it out inside the AI Profit Boardroom.

[00:03:44]Inside the AI Profit Boardroom, you get the full Agent OS zip file ready to install, so you're not starting from scratch. I've also built a complete 30-day roadmap to walk you through it step by step. On top of that, there are live coaching calls where you can ask me about your own setup and fresh walkthroughs for plugging Kimi K3, Claude Fable 5, and GPT 5.6 Soul straight into your Agent OS. It was actually just updated today with K3. So, if you want to skip the trial and error, that's where it lives. Now, back to the tests. Let's talk failures and simulations because this is where things got interesting. I ran a black hole simulation. Kimi K3 made the most visually impressive one by far. I could move it around and preview it side by side. The Fable 5 and GPT 5.6 Soul versions felt a bit off, like something wasn't quite right inside them. Then a fluid in a box test. K3 looked crazy good. Fable 5 came out really basic. GPT 5.6 Soul did something interesting. But across these harder tests, K3 kept crushing it. Here's the big thing though. Kimi K3 is open. That means the model is being released for anyone to use and run, not locked behind one company. And I think we're really at the point where open models are right at the frontier now. They're improving fast, really fast. And that changes the game for people like us who want to build. Let me be straight with you on benchmarks though. I don't trust them blindly and neither should you. I like to test stuff myself. When I looked at the official numbers, Moonshot says K3 still trails Claude Fable 5 and GPT 5.6 Soul on overall performance. But it beats older frontier models like Claude Opus 4.8 and GPT 5.5 on some coding and agent tests. So, it's not the undisputed champion. It's a challenger that's landing right in the mix. That's why I built my own testing instead of just trusting a chart. Test it for yourself.

[00:05:24]Don't even take my word for it. Make up your own mind. Now, pricing and context.

[00:05:29]All three have massive context windows so they can handle a lot at once. But here's where K3 stands out for me. It's much more affordable to run than Fable 5 and GPT 5.6 Soul. With the big paid models, you have to watch your usage carefully and on heavy testing I've had to switch to the API because the normal plans ran out. That didn't happen with K3. I kept regenerating tests and it just kept going on a budget-friendly plan. So, the quality is right up there and it's cheaper to run and it's open.

[00:05:53]That's a strong combination. That's also what I do inside the AI Profit Boardroom to keep everything moving. I use my Agent OS to map out the entire onboarding flow new AI Profit Boardroom members go through on day one. The welcome messages, the first call prep, the resource walkthrough, all planned from one prompt. So, new AI Profit Boardroom members land inside and instantly know exactly what to do next.

[00:06:13]That's the kind of task where running a cheaper model like K3 next to the big ones really pays off. Now, where is K3 actually getting used? When I looked at the tools people are plugging K3 into the most, Claude Code was right at the top of the list, which is funny because that means people are running Kimmy's model inside Claude's coding harness.

[00:06:29]And I want to try that myself, plug K3 into Claude Code and see how it performs. Little experiments like that are how you find the winning combinations. This brings me to the Agent OS workflow, which is the heart of how I do all of this. Inside my Agent OS, I don't just use one model. I have a group chat where all my agents, including Kimmy K3, talk to each other.

[00:06:47]I can orchestrate all three together like a team inside a company. And there's a memory system built in, so the second K3 dropped, I wasn't starting from zero. It already had all the context about me and my projects saved in a memory setup using Obsidian. That's the difference. New model comes out and I plug it straight in without losing anything. I also built a video with K3.

[00:07:06]I used it with a video skill and it made a really clean one. Nice camera angles, nice animations, all automated in the background. It even moved when I moved my mouse like a video on a website at the same time. First time I'd seen that.

[00:07:16]So, why do you even need an Agent OS?

[00:07:18]Simple. New models drop every few weeks now. If you're set up right, you just slot the new one in and keep going. If you're not, you're rebuilding your whole workflow every single time. An Agent OS lets you run the best model for each job. K3 for the fast, cheap, creative builds. Claude for the high-stakes work I can't get wrong. GPT 5.6 solo where it fits. All in one place sharing the same memory. Here are my quick tips. One, don't marry one model. Use the right one for the job. Two, always test yourself instead of trusting benchmarks. Three, give your agents a shared memory so you never start from scratch. And four, for anything big and important, I still lean on Claude because my systems are built into it. But K3 is a fantastic cheaper option for a huge chunk of the work. If you want the full process, the SOPs, and 100 plus AI use cases like this one, join the AI Success Lab. Links are in the comments and description. You'll get all the video notes from there, plus access to our community of 85,000 members who are learning and building with AI every day. And if you're about to try running these models together yourself, you're going to hit a few walls. Which model to use where? How to give them shared memory? How to plug a brand new model in without breaking your setup? That's exactly what we solve inside the AI Profit Boardroom. You get the full Agent OS zip file ready to install, the 30-day roadmap to guide you, live coaching calls to fix your setup in real time, and the prompts and tutorials for every model in this video.

[00:08:35]Over 4,000 members are already in there building. Come join us at aiprofitboardroom.com.

[00:08:40]Thanks for watching.