Science & Tech · AI · 13 hrs ago
Moonshot AI launches 3-trillion-parameter Kimi K3.1 Pro
Moonshot AI released Kimi K3.1 Pro on October 24, describing it as its next-generation open AI model.
The model has about 3 trillion parameters and can handle a context window of 1 million tokens.
It builds on Kimi K3, which Moonshot AI released in July with 2.8 trillion parameters, and uses substantially more computing for post-training.
The company says coding, 3D creation and long-running agent tasks improved, including the ability to use specialist tools to build models and interactive scenes.
In two international finance evaluations, Kimi K3.1 Pro reportedly scored above leading closed models.
Its size and reported abilities matter because it is billed as the world’s largest open model, while benchmarks suggest it is approaching leading closed models overall.
Moonshot AI launched its open-source Kimi K3.1 Pro model on October 24.
The model has around 3 trillion parameters and supports a context window of 1 million tokens.
China News Service reported that it remains the world’s largest open-source model by parameter count.
Kimi K3.1 Pro is a post-training version of Kimi K3, which Moonshot AI released in July with 2.8 trillion parameters.
The company’s model is reported to have improved capabilities in coding, 3D creation, financial research and long-running agent tasks.
- Who
- Moonshot AI, a Chinese artificial intelligence company.
- What
- It launched Kimi K3.1 Pro, an open-source AI model with around 3 trillion parameters.
- When
- October 24, 2026; China News Service said it was released in the early hours.
- Where
- Not stated.
- Why
- Not stated.
This story does not have two clearly opposing sides.
Moonshot AI released Kimi K3 with 2.8 trillion parameters.
Moonshot AI launched Kimi K3.1 Pro as a post-training version of Kimi K3.
- Model
- Kimi K3.1 Pro
- Parameter count
- Around 3 trillion
- Context window
- 1 million tokens
- Earlier model
- Kimi K3, released in July 2026 with 2.8 trillion parameters
- Reported strengths
- Coding, 3D creation, financial research and long-running agent tasks