UPI, cards, net banking.
Top up through Cashfree, our payment gateway. Card, UPI and bank details are entered with the gateway and never reach our servers.
UPI · GST invoice · INRPay for AI APIs
Pay for AI APIs
with UPI.
Add prepaid INR credits by UPI, cards or net banking through Cashfree, get a tax invoice with our GSTIN after every payment, and spend the balance on any model, per token. No subscription, no USD card.
import os
from openai import OpenAI
client = OpenAI(
api_key=os.environ["TB_API_KEY"],
base_url="https://api.topbilling.in/v1",
)
response = client.chat.completions.create(
model="tb-gpt-6-astra",
messages=[{"role": "user", "content": "Summarise this ticket in one line."}],
)
print(response.choices[0].message.content)
Why Top Billing
On every payment.
GST is shown before you pay, and a tax invoice carrying our GSTIN is on the Billing page after every successful payment.
No subscription.
Credits are charged per token at each model’s listed price. No subscription, no platform fee, no minimum monthly spend.
4 steps.
A few minutes.
- 01
Create an account
Sign up free and add your billing details for the invoice.
- 02
Top up in rupees
₹100 to ₹50,000 per top-up, by UPI, cards or net banking.
- 03
Download the invoice
The tax invoice is on the Billing page as soon as the payment succeeds.
- 04
Spend per token
Each request settles on the tokens the model reports, at its listed price.
Live catalogue
One balance. Every model.
Prices in INR per 1M tokens, before GST, from each model’s active pricing version. See every price.
ModelCapabilitiesContextInput / 1MOutput / 1M
tb-gpt-6-astraGPT-6 Astrastreaming · tools · vision1M₹864₹4,320tb-claude-fable-5Claude Fable 5streaming · tools · vision1M₹864₹4,320tb-claude-fable-5-1Claude Fable 5.1streaming · tools · vision1M₹864₹4,320tb-claude-opus-5Claude Opus 5streaming · tools1M₹432₹2,160tb-claude-opus-5-5Claude Opus 5.5streaming · tools1M₹345.60₹1,728tb-claude-sonnet-5Claude Sonnet 5streaming · tools · vision1M₹172.80₹864tb-claude-sonnet-5-5Claude Sonnet 5.5streaming · tools · vision1M₹172.80₹864tb-deepseek-v4-proDeepSeek V4 Prostreaming · tools · vision1M₹107.95₹323Before you
start.
More in the full FAQ.
How do I pay?
Add credits on the Billing page with UPI, cards or net banking through Cashfree, our payment gateway. Card, UPI and bank details are entered with the gateway and never reach our servers.
Do I get a GST invoice?
Yes. GST is shown before you pay, and a tax invoice carrying our GSTIN is on the Billing page after every successful payment.
Are the prices before GST?
Yes. Every price on this page is in INR before GST. 18% GST is added when you top up, and shown before you pay.
How much can I top up?
₹100 to ₹50,000 per top-up, by UPI, cards or net banking through Cashfree.
Is there free credit?
New accounts start with zero credit. A promo code adds credit to a project’s wallet, and it is spent like any other credit.
Is there a subscription or platform fee?
No. Credits are prepaid in INR and charged per token at the model’s listed price on the pricing page. No subscription, no platform fee, no minimum monthly spend.
Can credits be refunded?
Credits are prepaid, non-transferable and usable only on Top Billing. Refunds follow the refunds and credits policy.
Top up by UPI.
Build with any model.
Create an account, add credits in rupees and get your GST invoice in the same minute.