Wire · technology
NeoHorse-1-4B: A 4B Model Built for AI Agents and Tool Use
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Fusion42 · 10 September 2026 · Fusion42 review
NeoHorse-1-4B is a 4-billion parameter language model specialised for text-based AI agents that use tools, code generation, and instruction following, supporting very long contexts up to 262k tokens natively and extensible further. Its novel training employs routing-guided agentic post-training that adapts capabilities based on tool interaction data, making it highly suitable for complex agentic workflows and coding assistance.
This Wire brief sits within Fusion42's coverage of AI Agents and AI Infrastructure.
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The shift lies in AI models trained to improve tool use and agent execution from real usage data. You in AI agents or coding assist tools must explore routing-based training to boost practical performance beyond standard benchmarks.
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1 source · 10 Sep 2026
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