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Intern S2 Preview 397B

Shanghai AI LaboratoryOpen WeightsPending Human Review

Intern S2 Preview scales multimodal pretraining, scientific reinforcement learning, and long-horizon agent environments. It learns from raw pages of scientific literature and combines general reasoning with tasks across more than twenty scientific domains. The 397B checkpoint supports language output, image understanding, and tool calls. Its text evaluations use up to 256K inference, while multimodal evaluations use shorter 64K limits. The official laboratory announcement identifies the public release date as 2026-07-17.

2026-07-17
397B
Multimodal Mixture of Experts
Apache-2.0

Specifications

Parameters
397B
Architecture
Multimodal Mixture of Experts
License
Apache-2.0
Context Window
262,144 tokens
Type
multimodal
Modalities
textimage

Benchmark Scores

Advanced Specifications

Model Family
Intern-S
API Access
Available
Chat Interface
Available

Capabilities & Limitations

Capabilities
scientific reasoninglanguage generationmodel research
Known Limitations
Checkpoint capacity and evaluation limits differLarge weights need substantial inference resourcesResearch metrics are provider-reported
Notable Use Cases
scientific assistantsmultimodal researchprivate model experimentation

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