GPT-4.1 nano API in India

GPT-4.1 nano is the smallest, fastest tier of OpenAI's GPT-4.1 family, built for high-volume calls where cost and latency matter more than headroom for complex reasoning — and it's reachable from India on unoblox's single ₹-billed endpoint with one GST invoice covering every model you call.

What nano-tier models are for

Nano-class models exist for the calls an application makes thousands of times a day, not the ones it makes once per user session: short classifications, quick moderation checks, single-field extraction, autocomplete-style suggestions. The trade is fewer parameters and a narrower quality ceiling in exchange for lower per-token cost and faster responses — a trade that only makes sense when the task is simple enough that the smaller model's answers are reliably good enough.

₹ pricing for GPT-4.1 nano

GPT-4.1 nano doesn't carry a fixed indicative rate here — check the live number on its model page. Its larger siblings, for scale:

Model	Input (₹ / 1M tokens)	Output (₹ / 1M tokens)
GPT-4.1	201.6	806.4
GPT-4o	252	1008

As the smallest tier in the family, GPT-4.1 nano is priced below both GPT-4.1 and its mini tier — confirm the live figure before sizing a high-volume workload.

Calling GPT-4.1 nano on unoblox

curl https://api.unoblox.ai/v1/chat/completions \
  -H "Authorization: Bearer ub-gw-xxxxxxxxxxxxxxxx" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-4.1-nano",
    "messages": [{"role": "user", "content": "Classify this message as billing, technical, or general."}]
  }'

Because nano calls are typically cheap and fast individually, the real cost driver is volume — worth checking the live ₹ rate against your expected calls-per-day before committing an entire pipeline to it.

Nano vs mini vs full GPT-4.1

• GPT-4.1 nano — highest volume, simplest tasks: tagging, routing, short-form extraction.
• GPT-4.1 mini — the middle tier, for tasks that need slightly more judgement than nano reliably provides.
• GPT-4.1 — full quality, for the smaller share of calls where getting the answer right matters more than shaving cost off each request.

A common pattern is routing most traffic to nano and escalating only the calls a lightweight check flags as ambiguous to mini or full GPT-4.1 — all three sit behind the same key, so the routing logic lives entirely in your own code.

Frequently asked questions

Is GPT-4.1 nano available in India through unoblox? Yes, openai/gpt-4.1-nano is callable on https://api.unoblox.ai/v1 right after signup, billed in rupees.

What does GPT-4.1 nano cost on unoblox? It isn't in our fixed indicative list; see the live ₹ rate on its model page, which sits below both GPT-4.1 mini and full GPT-4.1.

What kind of tasks is GPT-4.1 nano actually good for? Short, well-defined tasks — classification, routing, single-field extraction — rather than long-form writing or multi-step reasoning.

Can I mix nano with larger GPT-4.1 tiers in one application? Yes, all three sizes are called with the same key and endpoint; only the model field changes per request.

Does GPT-4.1 nano keep data in India? No, it runs on OpenAI's infrastructure. The India-specific benefit is ₹ billing, a GST invoice and one endpoint, not data residency.

Is a GST invoice issued for GPT-4.1 nano usage? Yes, combined with all other model usage into one monthly GST invoice, with input tax credit claimable.

Get started in rupees → https://unoblox.ai/sign-in