Agents-A1 4B
Agents-A1 4B is Shanghai AI Laboratory’s model for long-horizon search, engineering, and scientific agent workflows. Its training combines long verified trajectories, domain experts, and on-policy distillation to consolidate specialized skills into one language model. It generates reasoning, text, and tool requests; external tools and a harness provide execution. Official cards explicitly date the 2026-07-14 release and document a 262K context. Apache-licensed weights and evaluation code support local deployment, while benchmark performance depends on the evaluation environment and external search infrastructure.
2026-07-14
4B
Dense Transformer
Apache-2.0
Specifications
- Parameters
- 4B
- Architecture
- Dense Transformer
- License
- Apache-2.0
- Context Window
- 262,144 tokens
- Type
- text
- Modalities
- text
Benchmark Scores
Advanced Specifications
- Model Family
- Agents-A1
- API Access
- Not Available
- Chat Interface
- Not Available
Capabilities & Limitations
- Capabilities
- long-horizon reasoningtool callingresearchcoding
- Known Limitations
- Requires a tool harness for executionLong trajectories can consume substantial inference timeResults depend on external tools and information quality
- Notable Use Cases
- scientific agentssearch assistantsengineering workflows
- Function Calling Support
- Yes
- Tool Use Support
- Yes