LLM Weekly — W30: Kimi K3 makes the open frontier 2.8 trillion parameters — and Chinese

The largest open-weight model ever released shipped this week — reportedly 2.8 trillion parameters, native vision, a million-token context — and it came from Beijing, not Silicon Valley. Then four more models landed on top of it by Friday, which is the real story: frontier releases have become weather.

Moonshot AI ships Kimi K3 — 2.8T open weights with native vision and a 1M-token context. China's Moonshot released Kimi K3 as a free open-weight download: reportedly 2.8 trillion parameters, multimodal vision built in, and a million-token window — frontier-scale weights anyone can self-host behind their own firewall. Every closed US lab now competes against a free artifact enterprises can run in-house, and the reference "free, frontier-scale" model keeps shipping from Beijing. That reshapes both the pricing conversation and the data-sovereignty one for Western buyers. Source: AI Search.

Four more models landed under the radar. Alongside Kimi, the week's dump included Bonsai 27B, Alibaba's Wan Dancer (video/motion), a GPT "Red" variant, and OpenAI's Codex Micro coding model — plus a refreshed, cheap-and-fast Google Flash tier and an agentic-coding mixture-of-experts from Poolside. None got individual attention because Kimi swallowed the oxygen. The cadence is the signal: releases are now weekly noise, not events. Sources: AI Search; MarkTechPost.

Cisco open-sources Antares-350M and 1B — small models that hunt code vulnerabilities. Cisco's Foundation AI group released two open-weight small language models (350M and 1B) purpose-built to find and localize security bugs in source code. The pitch is economics, not raw capability: a 1B model that runs in CI on every commit — self-hosted, no code leaving the building — is a different security posture than shipping your codebase to a frontier API. Specialized small models win the SOC and the CI pipeline first. Source: MarkTechPost.

Anthropic ships Cowork and extends Fable 5 — again. Anthropic launched Cowork (built by Felix Rieseberg), framed as a shared workspace where humans and Claude agents work side by side rather than a chat window — the lab continuing to climb from API to application. In the same week it pushed Claude Fable 5's availability out for the second time in seven days, a tell that demand is outrunning the planned deprecation schedule. Sources: The Neuron; Creators' AI.

The Future of Life Institute hands the frontier labs a failing report card. FLI published an updated safety assessment grading the major labs, and the coverage framing — "AI Gets a Report Card" — points to low marks across the board on risk management and existential-safety commitments. With binding US legislation stalled, third-party scorecards are becoming the de facto accountability layer boards cite when they ask whether a model vendor is actually safe. Source: Creators' AI.

Watch next week for whether any US lab answers Kimi K3 with open weights of its own — or whether the open frontier stays a one-way street running west out of Beijing.

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