Originally published on rohitraj.tech
A WhatsApp support bot doing 10K conversations a month costs roughly ₹1,250 on Gemini 2.5 Flash, ₹3,800 on GPT-5-mini, and ₹7,200 on Claude Sonnet 4 — before GST, FX margin, and the 2% TDS your CA will flag on foreign invoices. Here is the line-item cost math, the latency truth from a Mumbai-based MVP, and which API actually wins for which India use case.
Read the full version with code samples, diagrams, and architecture details: OpenAI vs Claude vs Gemini API — Real Cost for India MVP 2026
More engineering notes: rohitraj.tech/en/notes
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