Moonshot · flagship coding model
Kimi K3 coding guide
The model wave everyone is searching, price, benchmarks, open weights timeline, coding seats, and how to use Kimi without letting hype rewrite your stack.
Definition
Kimi K3 is Moonshot AI’s flagship model for long-horizon coding and agentic work, multi-trillion-parameter MoE scale, million-token context, and product surfaces spanning Kimi.com, Kimi Work, Kimi Code, and the official API. Official orientation lives on the Kimi K3 quickstart and launch blog.
What people are actually searching
US Trends and Search Console for our site show a full hype stack, “what is kimi k3,” price/pricing/API, benchmarks, Kimi Code, Hugging Face downloads, open source, free, and head-to-heads with Fable. Each intent needs a different answer — not one viral screenshot.
What is Kimi K3 (model map)
Architecture, capabilities, product surfaces
Kimi K3 price & API cost
Cache-hit vs miss vs output math
Is Kimi K3 open source?
API live vs weights timeline
Can Kimi K3 run locally?
Ollama / HF / VRAM reality
Kimi K3 API guide
Model ID, keys, agent loops
Is Kimi K3 free?
Free tiers vs real coding seats
How to use Kimi K3 for coding
15-minute verified setup
Kimi K3 vs Claude Fable 5
Our highest-impression compare
Head-to-heads that already rank
Kimi K3 vs Claude Fable 5
Coding verdict with harness context
Kimi K3 vs GPT-5.6 Sol
Coding verdict with harness context
Kimi K3 vs Claude Opus 4.8
Coding verdict with harness context
Kimi K3 vs Grok 4.5
Coding verdict with harness context
Kimi K3 vs MiniMax M3
Coding verdict with harness context
Kimi K3 vs GLM 5.2
Coding verdict with harness context
Live scoresKimi K3 scorecard · leaderboard · methodology.
Kimi as a harness seat (not a religion)
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01
Write acceptance criteria
Two paragraphs of done before the agent edits.
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02
Pick the path
Kimi Code for interactive product UX, API for automation and multi-agent crews.
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03
Budget first
Cache-aware prompts, output limits, kill switches on long loops.
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04
Verify outside Kimi
Your suite is authority. Vendor Arena scores are signals, not CI.
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05
Route hard seats
Keep Claude/GPT/Grok for judgment when Kimi is the implementer — or reverse it based on your board.
RelatedAI coding harness, agentic workflow, context engineering.
Latest Kimi news on this site
FAQ
What is Kimi K3?
Kimi K3 is Moonshot AI’s flagship model (about 2.8T parameters) positioned for long-horizon coding, knowledge work, and deep reasoning, with a 1M-token context window and native multimodality. API access is live, full weights are scheduled by July 27, 2026 per Moonshot docs.
Is Kimi K3 free?
Product trials and free tiers can exist, but serious coding seats are metered. API tokens and Kimi Code plan quotas. “Open source” and “free forever at frontier quality” are not the same thing. See our free-vs-paid breakdown.
Is Kimi K3 open source?
Moonshot markets K3 as an open-source flagship class model. Apps and API are live now, full weight release is a separate milestone (July 27, 2026 per official materials). Always read the license when weights land.
Kimi K3 vs Claude Fable 5?
On our coding-focused comparisons, Kimi often wins pure implementation value and cost, Fable remains elite on hard agent judgment. Run both on your repo — vendor charts are not your CI.
How do I use Kimi K3 in a harness?
Treat Kimi as a seat. API key or Kimi Code for interactive work, budget alerts on, tests as the gate. Pair with Claude or GPT seats when agentic review needs a different profile.
The app behind this research
TheVibeFather is the multi-CLI AI coding harness
When Kimi K3 is only one seat in a real coding week, TheVibeFather runs it beside Claude Code, Codex, OpenCode and the rest — with memory and a verify gate.