← Kimi K3
WorldofAI
Kimi K3 IS INSANE! Best Open Model EVER That BEATS FABLE 5 & GPT-5.6! (Fully Tested)
⏱ 18 min video · 2 min read17 Jul 2026Worth watching
TL;DR
Moonshot AI has released Kimi K3, a 2.8 trillion parameter open-source model with a 1 million token context window that ranks third on the WorldofAI benchmark, competing directly with Claude Opus 4.8, GPT-5 (o3), and Gemini 2.5 Pro at significantly lower prices. The creator runs extensive live tests across coding, 3D game generation, front-end design, and SVG creation, concluding that K3 is a landmark open-weight model that matches or beats closed-source frontier models in several domains.
Key points
1
Kimi K3 is a 2.8T parameter open-source model ranked #1 on ProgramBench and SWE-marathon, and #3 overall on the WorldofAI benchmark, placing it alongside top closed-source models.
2
Pricing is $3 per 1M input tokens and $15 per 1M output tokens (approx. $0.30 with cache hit), comparable to Claude Sonnet pricing but delivering near-flagship performance.
3
In a head-to-head coding test, K3 produced a detailed 3D armory scene while Claude Opus 4.8 produced a near-empty room with minimal objects from the same prompt.
4
K3 achieved over 91% on BrowserComp at ~$2 per task, rivaling GPT-5 and Claude Prometheus 5 at a fraction of the cost, making it a top-value browser agent.
5
K3 claimed the #1 spot on Design Arena, beating Gemini 2.5 Pro on front-end design, and demonstrated best-in-class SVG generation, macOS cloning, 3D game creation, and interactive web experiences.
Actionable insights
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Use Kimi K3 via the Kimi chatbot (free tier available) or Kimi Code harness for complex coding, 3D generation, and agentic tasks instead of paying Claude Opus 4.8 prices.
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For browser automation tasks, K3 delivers flagship-level BrowserComp performance at ~$2/task, making it a cost-effective drop-in for browser agent workflows.
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Developers building front-end or game prototypes should benchmark K3 first given its #1 Design Arena ranking and strong Three.js output — it completed a gameplay task for 3 cents versus Gemini 2.5 Pro at 38 cents.
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Access K3 via its API through the Kimi Code harness for multi-agent (K3 Swarm) deployments, or switch to the faster Kimi 2.6 mode when speed matters more than maximum capability.
Notable quotes
“I genuinely mean it when I say that K3 belongs in the big three conversation.”
“Few months ago, this would have sounded impossible for any model to actually generate, but you can see that this open weight model is something that is generating explorable worlds with terrain gameplay systems, you have NPCs, and an impressive visual fidelity with a single prompt generation.”
“The Kimi K3 had gotten this task done in just 3 cents, whereas Fable 5 spent around 38 cents.”
Worth watching?
✅
Worth watching the full video?
Watch if you want to see the live coding demos — the macOS clone, Spider-Man swinging game, Red Dead-style open world, and FPS shooter outputs are genuinely striking and give you a visceral sense of what K3 can do that reading benchmarks alone cannot.
Saved you some time? The creator still deserves a like.
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