Kimi K3 💡 enabled

Rank
1
AI judge score
93.8
Human score
Ranking duels
1727
95% interval
92.9–94.7

Claude Opus 5 💡 adaptive high

Rank
2
AI judge score
93.7
Human score
Ranking duels
1727
95% interval
92.7–94.6

Direct result

Kimi K3 💡 enabled earns 10.3% of the available points against Claude Opus 5 💡 adaptive high.

2 wins · 2 ties · 25 losses · 29 published duels.

Writing example

Write a long, thoughtful letter to your closest friend from university, Tomas, whom you have not seen in three years because life pulled you both in different directions. You have recently learned that he is going through a divorce and has moved back to your shared hometown. In the letter, acknowledge the silence between you honestly without excessive apology, recall two or three specific shared memories from your student days (an ill-fated camping trip and the late-night conversations in the campus laundry room), gently offer support without pressuring him to talk before he is ready, and propose meeting up at the old café you both liked. Keep the tone genuine, unforced and personal, balancing warmth with respect for his difficult situation. Write between 700 and 1000 words.

Published verdict : Advantage to model B (judged by Claude Fable 5.1).

Kimi K3 💡 enabled

Dear Tomas, Marek called me last week. He told me you'd moved back home, and then, more quietly, he told me why. I've been carrying the news around for a few days now, trying to figure out the right way to reach out, and eventually I decided there isn't one — there's just reaching out or not. So here I am. First, the three years. I'm not going to bury this letter under apologies, because I think we both know how it happened. There was no argument, no dramatic ending. Just the slow arithmetic of life — your job, my job, different cities, calls that got shorter, then rarer, then turned into birthday messages, then into nothing at all. I don't believe either of us chose it. But I also won't pretend I didn't feel it happening, because I did. There were things I wanted to tell you over these years and didn't, because I wasn't sure how to start anymore. That's on me as much as anyone, and I'd rather say it plainly than wrap it in regret. About what you're going through — I'm not going to ask what happened. If you ever want to tell me, I'll listen for as long as it takes. If you never want to talk about it, that's fine too, and I mean genuinely fine, not fine in the way people say when they mean the opposite. I just want you to know that I know, that I'm sorry, and that you don't have to perform being okay around me. You never did, actually. That was always one of the best things about us. Do you remember the camping trip in second year? The one we planned for three weeks and executed so badly it became legend? The tent we borrowed that turned out to be missing two pegs and most of its structural dignity. The rain that started around midnight and simply never stopped. You insisting the map was wrong, and the map, in the end, being completely right. We ate cold beans straight out of the tin because the stove wouldn't light, and I remember sitting under that leaking flysheet at two in the morning, soaked through, laughing so hard I couldn't breathe. I've been on better-organized trips since — drier ones, with actual cooked food — and I can barely remember any of them. That one I remember like it was last month. I think about it sometimes when things go wrong in my life now, and it still makes me smile, which is a strange gift for a disaster to give you. And the laundry room. Sunday nights, always Sunday nights, because we'd both left everything until the last possible hour. The hum of the machines, that smell of cheap detergent, the vending machine coffee that tasted faintly of its own plastic cup. We sat on the folding table like two delinquents and talked about everything — what we were afraid of, what we wanted, whether any of it was going to work out. I told you things in that room I've never told anyone since. There was something about the fluorescent light and the late hour and the fact that neither of us had anywhere else to be. You could say the real thing there. I've missed that more than I've missed most things in my life, and I didn't fully understand that until recently. I'm not writing all this to say "let's go back." We can't, and we shouldn't try — we're different people now, shaped by three years the other one didn't witness. But I've come to believe that some friendships don't live or die by frequency of contact. They live in whether the door is still unlocked. Mine is. I suspect yours might be too, or I wouldn't be writing this. Here's what I want to offer, and I want to offer it without any weight attached: I'm around. If you want to talk, I'll listen. If you want company while we discuss absolutely nothing — football, films, how strange it is to be back in this town — I'm good for that too. Sometimes nothing is a relief. I'm not going to check on you like a project or ask careful questions over your head. There's no timetable. You reply when you reply. When you're ready — and only when — I'd like to take you to Café Luna. I walked past it last month; it's still there, somehow. Same wobbly corner table with the folded cardboard under the leg. Same owner who never once smiled at us in four years but always remembered our order. I'll be there most Saturday mornings around ten, just because I like the place. Come along whenever it suits you — this week, next month, whenever. And if Saturdays don't work, name a day and I'll make it work. If you'd rather wait a while, wait. The café isn't going anywhere, and neither am I. It's good that you're home, Tomas. Not the circumstances — I wouldn't wish those on anyone — but the geography. This town is a decent place to land when the ground elsewhere has given way. I should know. It's caught me a few times. No pressure for a long reply. A single line will do. Even just telling me the tent still exists somewhere would make my day. Your friend, then and now, Daniel

Claude Opus 5 💡 adaptive high

Tomas, I heard about the divorce from Marek, who heard it from his sister, who apparently still follows your mother on Facebook — which tells you something about the strange machinery that carries news between people who used to talk every day. I sat with it for about a week before writing this, mostly because I kept starting letters that sounded like sympathy cards, and you'd have seen through that in a second. Three years. I'm not going to perform a lot of guilt about it, because I don't think you want that and I don't think it would be honest. What happened is unremarkable: I got busy, you got busy, the messages got shorter, then they got further apart, and then at some point neither of us was the one who owed the other a reply and it became easier to leave it alone. I thought about you often. I just didn't do anything about it, which I've come to understand is a different thing entirely. So — no elaborate apology, but I do want to say plainly that the silence was mine as much as yours, and that I'm not treating this letter as some grand repair. It's just a letter. I'm writing it because I want to. I've been thinking about that camping trip. You remember — the one you planned, with the laminated route map. I want the record to show that I have never once said "I told you so" about that weekend, despite having considerable grounds. What I remember most clearly isn't even the rain, though God, the rain. It's you standing in the dark holding those two tent poles, one in each hand, looking at them like they'd personally betrayed you, and saying with total seriousness: "These are the same pole." And they were. They were the same pole, and the pole they were supposed to be was still in the storage room in the dorm basement, and it was eleven at night and eight kilometres to anything. We slept in the car with the seats down, and you kept apologizing, and I kept saying it was fine, and around three in the morning you said, "This is going to be the story, isn't it," and it was. It has been. I've told it at three separate dinner parties and I always give you a slightly more dignified role than you actually had. And then the laundry room. That's the other thing I keep coming back to. I don't think either of us realized at the time that those conversations were the actual education — that the degrees were sort of incidental. The room with the one fluorescent tube that buzzed, the machine on the end that ate coins and gave nothing, the smell of that industrial detergent that I can still summon at will. We'd both turn up at midnight because that was when the machines were free, and we'd sit on the folding table with our backs against the wall and talk until the cycle finished, and then usually keep talking through someone else's cycle too. You told me about your father in that room. I told you things in that room I hadn't told anyone, including myself. There was something about the hour and the noise and the fact that neither of us was looking directly at the other that made it possible. I've had a lot of good conversations since university. I'm not sure I've had many like those, and I've wondered whether that's about age or about the specific fact of you. About what you're going through: I'm not going to ask you anything. I mean that as a genuine offer rather than as distance. If you want to talk about it, I will listen for as long as you want to talk, and I won't try to solve it or find the silver lining or tell you about my cousin who was miserable for two years and is now radiantly happy in Lisbon. And if you don't want to talk about it — if what you actually want is to sit with someone who knows you and discuss absolutely anything else, football or films or the fact that our old faculty building is apparently a hotel now — that's equally fine, and I won't take it as you shutting me out. You don't owe me the story. You don't owe me an update. Divorce, from what I understand of it secondhand, seems to involve an enormous amount of explaining yourself to people, and I'd like to be one of the ones you don't have to explain yourself to. I also know something about moving back home, and how it can feel like a demotion even when it's the sensible choice. Small towns have long memories and short questions. I imagine you're getting a lot of "and how are you *really*" from people who want the gossip more than the answer. I'm not asking that either. Here's the actual proposal. I'm going to be back the last weekend of August — my mother's birthday, non-negotiable, so I'll be in town regardless. Let's go to Zeleny Dům. I checked, and astonishingly it's still there, still with the terrible chairs, and if there's any justice still with the same man behind the counter who used to give us the second coffee free when we stayed past closing to argue about something neither of us understood. Saturday afternoon, or Sunday, or both. No agenda. If you'd rather walk instead of sit, we'll walk. If you want to cancel the morning of because you can't face it, cancel the morning of and I won't be offended, and I'll ask again in a month. Write back whenever you can. Or don't write back and just say yes to the café. Either counts. With love, and without conditions — Petr

How to read this page: AI and human scores remain separate. The AI score uses the main-leaderboard scale, not a percentage grade: for the selected category, 50 means an estimated one-in-two chance of beating the average English-writing model. The direct record uses only protocols compatible with the main ranking and never mixes reasoning modes.