Jan-Code-4B: A Lightweight Code-Tuned Model for Local Development
Jan-Code-4B Release Details
The Jan team has released Jan-Code-4B, a small code-tuned model built on Jan-v3-4B-base-instruct. This experimental model targets day-to-day coding assistance tasks including code generation, edits/refactors, basic debugging, and writing tests while maintaining a lightweight footprint suitable for local execution.
Intended Use and Performance
Jan-Code-4B is designed as a drop-in replacement for the Haiku model in Claude Code. On coding benchmarks, it shows small improvements over the baseline model and generally feels more reliable for coding-oriented prompts at this size.
How to Run Jan-Code-4B
Setup via Jan Desktop:
- Download Jan Desktop from https://www.jan.ai/
- Download Jan-Code via Jan Hub
Claude Code Integration:
- Jan makes it easier to connect Claude Code to any model
- Replace Haiku model with Jan-Code-4B
Model Links and Parameters
Model downloads:
- Jan-Code: https://huggingface.co/janhq/Jan-code-4b
- Jan-Code-GGUF: https://huggingface.co/janhq/Jan-code-4b-gguf
Recommended parameters:
- Temperature: 0.7
- Top_p: 0.8
- Top_k: 20
The Jan team credits u/Alibaba_Qwen for the base model and u/ggerganov for llama.cpp contributions.
📖 Read the full source: r/LocalLLaMA
👀 See Also
Tocket CLI: A Context Engineering Framework for AI Coding Agents
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Strale.io offers free IBAN and email validation API for AI agents with no signup
Strale.io provides a free API with five capabilities including IBAN validation, email validation, DNS lookup, URL-to-markdown conversion, and JSON repair. No signup or API key is required, and it includes an MCP server for Claude or Cursor integration.
Open-Source Ralph Loop Toolkit for Claude Code: Pickle Rick and Mr. Meeseeks Agents
An open-source extension for Claude Code implements the Ralph Loop technique with two autonomous agents: Pickle Rick for PRD-driven development and Mr. Meeseeks for code review. Both use tmux with live dashboards and macOS notifications.
Skir: A Modern Alternative to Protocol Buffers for Type-Safe Data Exchange
Skir is a declarative language for defining data types, constants, and APIs that generates idiomatic, type-safe code in TypeScript, Python, Java, C++, Kotlin, and Dart from a single .skir file. It includes built-in schema evolution safety, RPC support similar to gRPC, and serialization to JSON or binary formats.