Kimi Releases 3-Trillion-Parameter Model K3.1 Pro, Launching a Pro Version for the First Time
In the early hours of October 24, Moonshot AI (Kimi) officially launched Kimi K3.1 Pro, calling it its most capable 3-trillion-level parameter model to date, supporting a 1-million context window, with notable improvements in coding, 3D creation, financial research, and long-horizon Agent capabilities. Kimi K3.1 Pro is a post-trained version of Kimi K3; through enhanced post-training compute and technical optimization, it achieves comprehensive improvements across all domains from large-scale RL. This is the first time Kimi has introduced a Pro model in its model versions, and it is also the first model in the K3.1 series, leaving room for subsequent cost-effective models.
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For the first time, Kimi has split out a Pro tier within its version lineup, which readers can use to gauge its product stratification and positioning of long-horizon Agent capabilities.
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Kimi Iterates 3-Trillion-Parameter Large Model, Launches Pro Version Model for the First Time
2026-10-24 14:28:15 Source: Caixin.com Author: Yang Zirui Responsible Editor: Qu Yunxu
By Caixin Yang Zirui
October 24, 2026 14:28
When Kimi's previous-generation model K3 was launched, it caused a market stir; this new model once again becomes a representative of the frontier intelligence of domestic models and cuts prices
On October 24, 2026, Kimi launched a Pro model in a model version for the first time, calling it the first model in the K3.1 series. Image: Visual China
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[Caixin.com] In the early hours of October 24, Moonshot AI (Kimi) officially launched Kimi K3.1 Pro. Kimi said this is its most capable 3-trillion-level parameter model to date, supports a 1-million context, and shows particularly significant improvements in coding, 3D creation, financial research and other long-horizon Agent capabilities.
Recently, domestic models have successively released Flash-level models to seize the cost-effectiveness market. Kimi also launched a Pro model in a model version for the first time, calling it the first model in the K3.1 series, leaving room for the release of cost-effective models.
According to Moonshot AI's release announcement, Kimi K3.1 Pro is a post-training version of Kimi K3. By enhancing post-training compute and technical optimization, the Kimi K3.1 Pro model has achieved comprehensive improvements across all domains brought by large-scale RL (reinforcement learning).
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