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Seed OSS 36B

ByteDanceOpen WeightsPending Human Review

Seed OSS is ByteDance’s open language model family with a 36B dense backbone and native 512K context. It supports controllable thinking budgets, reasoning, and tool-using agents, targeting international developer use cases. The release groups instruction and base checkpoints, including base variants with and without synthetic training data. Apache-licensed weights allow private inference and fine-tuning. Benchmark results depend on reasoning budgets and deployment settings, while the full long-context capacity can require considerably more memory than short-prompt serving.

2025-08-20
36B
Decoder-only Transformer
Apache-2.0

Specifications

Parameters
36B
Architecture
Decoder-only Transformer
License
Apache-2.0
Context Window
524,288 tokens
Type
text
Modalities
text

Benchmark Scores

Advanced Specifications

Model Family
Seed
API Access
Not Available
Chat Interface
Not Available
Variants
Seed-OSS-36B-InstructSeed-OSS-36B-BaseSeed-OSS-36B-Base-woSyn

Capabilities & Limitations

Capabilities
reasoningtool uselong contextinstruction following
Known Limitations
Dense 36B weights require substantial memoryLong-context inference adds serving costThinking budgets affect both latency and quality
Notable Use Cases
private coding agentsdocument synthesisopen-model research

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