ermiaazarkhalili/FastContext-4B-SFT_base-Function-Calling-xLAM-Unsloth

TEXT GENERATIONConcurrent Unit Cost:1Model Size:4BQuant:BF16Context Size:32kTool Calling:SupportedPublished:Jun 21, 2026License:mitArchitecture:Transformer0.0K Open Weights Featherless Exclusive Cold

The ermiaazarkhalili/FastContext-4B-SFT_base-Function-Calling-xLAM-Unsloth model is a 4 billion parameter language model, fine-tuned from Microsoft's FastContext-1.0-4B-SFT. Developed by ermiaazarkhalili, it is specifically optimized for function calling tasks, leveraging the Salesforce/xlam-function-calling-60k dataset. This model utilizes Unsloth for efficient training, resulting in 2x faster fine-tuning and 60% less VRAM consumption, making it suitable for resource-constrained environments. Its primary strength lies in accurately interpreting user queries to generate structured function calls.

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Model Overview

This model, developed by ermiaazarkhalili, is a 4 billion parameter language model fine-tuned from Microsoft's FastContext-1.0-4B-SFT. It is specifically designed and optimized for function calling tasks, enabling it to interpret natural language requests and translate them into structured tool invocations.

Key Capabilities & Features

  • Function Calling Specialization: Fine-tuned on the Salesforce/xlam-function-calling-60k dataset, which comprises 60,000 examples of queries, tool definitions, and structured answers.
  • Efficient Training: Utilizes Unsloth for fine-tuning, achieving 2x faster training and 60% less VRAM usage compared to standard methods. This makes it highly efficient for deployment and further customization.
  • Base Model: Built upon the FastContext-1.0-4B-SFT architecture, providing a solid foundation for its function-calling capabilities.
  • Quantization Support: Available in various GGUF quantized versions (Q4_K_M, Q5_K_M, Q8_0) for CPU and edge inference, and supports 4-bit QLoRA for efficient GPU inference.
  • Context Length: Fine-tuned with a 2,048 token context window, suitable for processing moderately complex function calling scenarios.

Ideal Use Cases

  • Automated Tool Use: Excellent for applications requiring an LLM to interact with external APIs or tools based on user commands.
  • Chatbots & Assistants: Enhances chatbots by allowing them to perform actions (e.g., check weather, set reminders) through function calls.
  • Resource-Constrained Environments: Its efficient training and inference capabilities, especially with Unsloth and GGUF quantizations, make it suitable for deployment on consumer hardware or edge devices.

Limitations

  • Primarily trained on English data.
  • Knowledge is limited to the base model's training data cutoff.
  • May exhibit hallucinations, generating plausible but incorrect information.
  • Not extensively safety-tuned, requiring external guardrails for sensitive applications.