iromu/Qwen2.5-1.5B-k3

TEXT GENERATIONPricing:Input $0.04 / Cached $0.008 / Output $0.08Concurrent Unit Cost:1Model Size:1.5BQuant:BF16Context Size:32kTool Calling:SupportedPublished:Aug 26, 2026License:apache-2.0Architecture:Transformer Open Weights Featherless Exclusive Cold

iromu/Qwen2.5-1.5B-k3 is a 1.5 billion parameter language model fine-tuned from unsloth/Qwen2.5-1.5B-Instruct. This model specializes in structured tool/function calling and agent-style multi-step interactions, leveraging distillation from Kimi-K3 data. It is optimized for specific reasoning behaviors rather than general-purpose language generation, offering a compact solution for complex automation tasks. The model has a context length of 32768 tokens.

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Model Overview

iromu/Qwen2.5-1.5B-k3 is a 1.5 billion parameter language model, fine-tuned from unsloth/Qwen2.5-1.5B-Instruct. This model has been specifically trained using LoRA on the r0b0tlab/qwen3.8-max-glm5.2-kimi-k3-distillation dataset, focusing on distilling reasoning behaviors for advanced interaction patterns.

Key Capabilities

  • Structured Tool/Function Calling: Designed to accurately interpret and generate structured calls for external tools and functions.
  • Agent-Style Interactions: Excels in multi-step conversational flows, enabling more complex automated agents.
  • Distilled Reasoning: Incorporates reasoning patterns derived from the Kimi-K3 data mix, enhancing its ability to handle intricate logical sequences.

Training Details

The model was trained with LoRA (dimension 16, alpha 16, dropout 0.05) targeting key attention and feed-forward layers. Training utilized a maximum sequence length of 4096 tokens and a learning rate of 2e-5 over 1 epoch with BF16 mixed precision.

Intended Use

This model is ideal for applications requiring precise tool orchestration and sophisticated agentic behavior. It is not intended as a general-purpose replacement for larger Qwen models but rather as a specialized solution for specific automation and interaction challenges.