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Fine-Tuned Qwen2.5-1.5B vs Claude-Opus-5 for JSON Extraction

This story is from 2026-08-24. It is preserved in the archive; the latest stories are on the live feed.

In our previous blog , we described how we successfully fine-tuned Qwen2.5-1.5B-Instruct using QLoRA to extract structured JSON from unstructured text for a domain-specific use case. The results were promising, with the model achieving 62% exact match accuracy and 97% field match accuracy. However,…

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  1. 2026-08-24 16:09 · DEV Community — Machine Learning
    Fine-Tuned Qwen2.5-1.5B vs Claude-Opus-5 for JSON Extraction

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