GPT-5.4 nano

GPT-5.4 nano is the cheapest, fastest current-gen OpenAI model — an API-only micro-model for ultra-high-volume routing and classification, not deep reasoning.

Best for

• Ultra-high-volume, latency-critical, cost-minimised API workloads
• Classification, extraction, tagging, guardrail checks
• A fast pre-filter/router in front of bigger models

How it compares — and the India angle

• Ideal as a cheap router to cut overall spend for Indian-scale traffic — let nano triage and only escalate hard prompts.
• Not for reasoning, coding or nuanced generation — treat it as a fast classifier, not a thinker.
• If output is visibly weak, the smallest worthwhile upgrade is GPT-5.4 mini.