💼For Businessintermediate
GST-Aware Invoice Parsing API with GPT-4o-mini - Architecture, Cost, Real Pitfalls
A practical deep-dive into building a GST-aware invoice parsing API using GPT-4o-mini, covering prompt design for GSTIN/HSN/tax splits, handling handwritten and multi-line edge cases, fallback math validation, and real per-invoice costs on a 100-invoice test set.
May 20, 2026·4 min read
