ByteDance releases Seed-OSS-36B base and instruction model weights

August 20, 2025

Three 36B variants offer a 512K context window and thinking-budget control under Apache 2.0. The official model card dates release to August 20; the team blog and contemporary report were published the following day.

ByteDance

Sources

ByteDance Seed

Docs

ByteDance-Seed/Seed-OSS-36B-Instruct

News entry [2025/08/20] explicitly announces all three model variants; Introduction and License sections specify Apache 2.0.

Additional sources

South China Morning Post

News · Aug 21, 2025

ByteDance unleashes open-source model to challenge AI systems from DeepSeek, Alibaba Cloud

ByteDance Seed

Docs · Aug 21, 2025

Seed-OSS Open-Source Models Release

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