Kimi-K3
Kimi K3 is an open-weight, 2.8T-parameter native multimodal agentic model with a 1M-token context window, designed for frontier coding, knowledge work, and reasoning tasks.
它提供了可审计、有基准测试的证据(每单元 5 次盲评),证明向轻量模型(如 Sonnet 5)添加这些技能提示后,其表现可以匹配甚至超越更强模型(如 Opus 4.8)的裸跑结果,通过显式习惯而非模型规模来减少方差并缩小模型差距。
A library of 35 engineering-discipline skills — small, composable instruction files that encode how a careful senior engineer works, not what any particular framework does.
The most capable Claude models don't just know more — they work more carefully. Fable 5 reaches for a codebase's own conventions before writing, proves a bug's cause before fixing it, sweeps edge cases before declaring done, and reports what it actually verified rather than what it assumes. A strong-but-lighter model like Opus 4.8 can do all of that too — it just doesn't always reach for those habits unprompted.
These skills close that gap. Fable identified the places where a less deliberate run tends to fall short of its own ceiling — orientation, root-cause discipline, security reflexes, edge-case coverage, honest reporting — and wrote each habit down as an explicit, always-available checklist. Load them into a session and a model follows the discipline on purpose instead of leaving it to chance. The goal is simple: Fable-level output from whatever model is driving.
Each skill is one focused habit. They fire situationally — a debugging task pulls in root-cause-debugging, a diff touching user input pulls in security-reflexes, a schema change pulls in data-migration-safety — so the model carries the right discipline into the right moment without drowning in guidance.
Same method throughout: run an identical task through fresh agents with no guidance vs. with the relevant skill files, then score the outputs against a fixed answer key. Benchmark 1 uses Opus 4.8; Benchmark 2 runs both Opus 4.8 and Sonnet 5. These are directional signals, not statistical proofs.
The full assets are in benchmark/ — seeded tasks, answer keys, all 62 raw run outputs, the blind-grader prompts, and the per-item score tables — so every number below is auditable and re-gradable rather than take-my-word-for-it. (They were reconstructed verbatim from the original session transcript; each file carries a provenance header, and the recovery manifest in benchmark/README.md lists the known gaps.)
The same task was run through two fresh agents and both reviews were scored blind by an independent third agent. Task: review a Python ord
35 engineering-discipline skills authored by fable 5, with a blind-graded benchmark: sonnet 5 loaded with the skills beat opus 4.8 running bare. no deps, mit.
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Kimi K3 is an open-weight, 2.8T-parameter native multimodal agentic model with a 1M-token context window, designed for frontier coding, knowledge work, and reasoning tasks.

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