Kimi unveils K3.1 Pro and K3.1 Pro Highspeed, 3‑trillion‑parameter open‑weight models with a 1 million‑token context; full weights arriving from November 4
| Source: Techmeme | Original article
Kimi unveiled its K3.1 Pro, a 3‑trillion‑parameter open‑weight model with a 1‑million‑token context window, alongside a K3.1 Pro Highspeed variant, with full weights due by November 4.
Moonshot AI’s Kimi brand announced the launch of K3.1 Pro, a 3‑trillion‑parameter open‑weight model that pushes the frontier of publicly available AI. The new system boasts a 1 million‑token context window, 2.8 trillion total parameters and a 104 billion‑parameter active MoE core, and supports native multimodal inputs. A companion variant, K3.1 Pro Highspeed, promises two‑to‑three‑fold faster inference while retaining the same capabilities. Moonshot says the model excels at full‑project coding across Unreal, Unity and Godot, delivers reliable parametric 3D modeling in Blender and CAD tools, and shows improved accuracy on finance‑related tasks. Full model weights will be made downloadable on 4 November.
The release matters because K3.1 Pro is the first open‑weight model of its size class, a space previously dominated by closed, commercial offerings. A million‑token context dramatically expands the length of text a single prompt can span, opening new possibilities for long‑form reasoning, extensive codebases, and detailed document analysis. Open weights lower the barrier for academic and industry researchers to experiment with frontier‑scale architectures, potentially accelerating innovation in multimodal AI, code generation, and domain‑specific applications such as finance and engineering design.
The next steps will focus on the November weight release and the community’s response. Observers will watch benchmark performance on standard suites, adoption in tooling pipelines, and any pricing or licensing model Moonshot introduces. Comparisons with other frontier models—particularly proprietary systems from Anthropic and OpenAI—will shape how K3.1 Pro is positioned in the rapidly evolving AI landscape.
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