GPT-5.1 API in India

GPT-5.1 is OpenAI's refined point release in the GPT-5 line, tuned for everyday assistant work — chat, drafting, coding help, and light agentic tool use — and it's callable from India on unoblox's single ₹-billed endpoint, with one GST invoice standing in for a foreign-currency subscription.

Where GPT-5.1 sits in the GPT-5 family

OpenAI ships the GPT-5 line as a family rather than a single model: a full-size flagship, a mini tier for cost-sensitive volume, and periodic point releases like GPT-5.1 that refine the flagship without changing its position in the lineup. On unoblox, openai/gpt-5.1 sits alongside the rest of the catalogue behind the same key, so moving from GPT-5 to GPT-5.1 in an existing integration is a one-line change to the model field — no new SDK, no new auth flow.

₹ pricing for GPT-5.1

GPT-5.1 isn't in our fixed indicative list yet — check the live rate on its model page before sizing a workload. For scale, here's where the rest of the GPT-5 family sits today:

Model	Input (₹ / 1M tokens)	Output (₹ / 1M tokens)
GPT-5	126	1008
GPT-5 mini	25.2	201.6

Prices are indicative; the live rate on each model's own page is authoritative.

Calling GPT-5.1 from the unoblox endpoint

curl https://api.unoblox.ai/v1/chat/completions \
  -H "Authorization: Bearer ub-gw-xxxxxxxxxxxxxxxx" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-5.1",
    "messages": [{"role": "user", "content": "Draft a short reply to this customer email."}]
  }'

Streaming, tool calling and JSON mode all work exactly as they do calling OpenAI directly — only the base URL, the ub-gw- key and the ₹ billing change.

Picking between GPT-5, GPT-5.1 and GPT-5 mini

• GPT-5.1 — the newer point release; a reasonable default for new integrations once its live price fits the budget.
• GPT-5 — the original flagship in the line; still fully supported and priced at ₹126 / ₹1008 per 1M tokens.
• GPT-5 mini — for high-volume, latency-sensitive calls where the flagship's extra cost isn't justified by the task.

Because all three sit behind the same endpoint and key, it's practical to route different call types to different tiers from one codebase rather than committing an entire application to a single model.

Frequently asked questions

Is GPT-5.1 available in India through unoblox? Yes, openai/gpt-5.1 is callable on https://api.unoblox.ai/v1 as soon as you sign up, billed in rupees against your wallet balance.

What does GPT-5.1 cost on unoblox? It doesn't have a fixed indicative price in this note yet — see the live ₹ rate on its model page before estimating a monthly run-rate.

Can I switch an existing GPT-5 integration to GPT-5.1? Yes, change the model field to openai/gpt-5.1 — the request and response shape, streaming and tool calling stay the same.

Does using GPT-5.1 through unoblox mean data stays in India? No, GPT-5.1 runs on OpenAI's infrastructure. The India-specific part is ₹ billing, a GST invoice and one endpoint, not data residency.

Is a GST invoice issued for GPT-5.1 usage? Yes, GPT-5.1 usage is combined with every other model's usage into one monthly GST invoice from an Indian entity, and input tax credit is claimable.

Do I need an international card to use GPT-5.1 on unoblox? No. You top up your unoblox wallet in rupees through domestic payment methods; no foreign-currency card is required.

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