Open Source 73% 1 min readJul 5, 2026, 10:35 AM

longcat 2.0 (1.6T, ~48B active) weights are now open under MIT license

30-second summary

Longcat 2.0 model weights are now available under the MIT license, featuring 1.6T parameters and 48B active parameters. The model is open for use and modification by the community.

longcat 2.0 (1.6T, ~48B active) weights are now open under MIT license
Key takeaways
  • Longcat 2.0 model weights are now open sourced under the MIT license
  • The model features 1.6T parameters and 48B active parameters
  • The open-source release aims to foster community-driven AI development and innovation
  • The MIT license allows for free use and modification of the model
Full story

The release of Longcat 2.0 under the MIT license marks a significant milestone in the development of open-source AI models. This move allows developers and researchers to access, modify, and build upon the model, potentially leading to new breakthroughs and applications.

The Longcat 2.0 model boasts impressive specifications, including 1.6T parameters and 48B active parameters, making it a substantial addition to the open-source AI landscape. By making the model's weights available, the developers aim to foster a community-driven approach to AI development, encouraging collaboration and innovation.

This open-source release is expected to have a positive impact on the AI community, as it provides a valuable resource for researchers and developers to explore and improve upon. The MIT license ensures that the model can be used and modified freely, with the potential for widespread adoption and integration into various projects and applications.

The technical details of the Longcat 2.0 model are outlined in a blog post published on June 30, which provides an in-depth look at the model's architecture, capabilities, and potential use cases. With the model now available under the MIT license, the community can expect to see new and exciting developments in the field of AI.

Source: longcat 2.0 (1.6T, ~48B active) weights are now open under MIT license. Read the full piece at the source.

Why this matters
Developers

access to a powerful open-source AI model for research and development

Students

opportunity to learn from and contribute to a significant AI project

Everyone

advances in AI development and potential for new applications

Sources ยท 1
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