UPI, cards, net banking
Through Razorpay, GST included. No international card, no forex markup on your statement.
Claude API · priced in ₹
Same code.In rupees.One new URL.
Opus 5.5, Fable 5.1, Sonnet 5 and Haiku 4.5 in Claude Code, Cursor and the tools you already use. One base URL, one key — paid over UPI, cards or net banking, with no international card.
- 3-day trial ₹499
- GST included
- no auto-renewal
Secured by RazorpayUPIRuPayVisaMastercardNet banking
or run the setup once
POST
api.ultracode.in/v1/messages—one request
{
"model":
"claude-opus-5-5","claude-fable-5-1","claude-sonnet-5","claude-haiku-4-5-20251001","stream": true
}
sk-uc-••••••Opus 5.51M ctx · default
Fable 5.11M ctx · deepest
Sonnet 51M ctx · everyday
Haiku 4.5200K ctx · volume
one key, four railsrouting diagram · not a benchmark
round trip—from this browser
billed in₹INRUPI · cards · net banking
context—largest window listed
for developers in india
Claude's four tiers, priced in ₹.
Paying for Claude in dollars usually means an international card and a forex charge from your bank. Here the plan is in rupees, paid the way you pay for everything else.
Every tier on it
Opus 5.5, Fable 5.1, Sonnet 5 and Haiku 4.5. Pick one per request with the model field.
A window that refills
Every plan is an allowance on a rolling five-hour window, which then opens again in full. Nothing renews by itself.
the switch
Three moves. None of them in your code.
+
ANTHROPIC_BASE_URL=+
ANTHROPIC_AUTH_TOKEN=everything elseunchangedSet the base URL
Two variables the client already reads. No SDK fork, no wrapper, no proxy on your machine.
{
"model": "claude-opus-5-5","claude-fable-5-1","claude-sonnet-5","claude-haiku-4-5-20251001",
"max_tokens": 1024,
"stream": true,
"messages": [ … ]
}Name a tier
One field picks the tier. The rest of the body is whatever your client already sends.
- event:message_start
- event:content_block_start
- event:content_block_delta
- event:content_block_delta
- event:content_block_stop
- event:message_delta
- event:message_stop
Read the stream
Frames arrive in the order the SDK expects, message_start to message_stop, so the parser you have keeps working.
with the key
Built in from the first request.
Four things people ask about in the first minute, each shown rather than described.
Nothing to enable
Tool use, vision, documents, web search and streaming arrive with the key. There is nothing to enable and no second product to buy.
first sample on its way
min —max —0 sampleslive
Round trip, from where you sit
Each point is one GET /health from this browser to api.ultracode.in. It measures the path, not the model.
last five
—Five hours, then full again
The allowance is counted inside a rolling five-hour window. At the end of it, it reopens in full.
Pay in rupees
UPI, cards or net banking, GST included. The plan buys the window; the window refills.
4 tiers · read live from /v1/models
Four tiers, one field.
The model field picks the rail. Names and windows below are read from /v1/models when this page loads.
default
Opus 5.5
claude-opus-5-51Mcontext window
"model": "claude-opus-5-5"
deepest
Fable 5.1
claude-fable-5-11Mcontext window
"model": "claude-fable-5-1"
everyday
Sonnet 5
claude-sonnet-51Mcontext window
"model": "claude-sonnet-5"
volume
Haiku 4.5
claude-haiku-4-5-20251001200Kcontext window
"model": "claude-haiku-4-5-20251001"
see it stream
A reply, streaming.
A recorded session, replayed in your browser token by token the way a client reads it — a different task each day.
Add exponential backoff with jitter to fetchJson in lib/http.ts. Keep the signature.
Opus 5.5plays when this comes into view
I'll keep fetchJson's signature and wrap the existing call in a retry loop that only re-runs on 5xx and network failures.
export async function fetchJson<T>(url: string, init?: RequestInit): Promise<T> {
for (let attempt = 0; ; attempt++) {
const res = await fetch(url, init).catch(() => null);
if (res?.ok) return (await res.json()) as T;
const retryable = !res || res.status >= 500;
if (!retryable || attempt === 4) throw new Error(res ? `${res.status} ${url}` : `network ${url}`);
const base = 250 * 2 ** attempt;
await new Promise((r) => setTimeout(r, base + Math.random() * base));
}
}
A 4xx still throws on the first pass, so callers that already handle validation errors see no change. The wait grows from 250 ms to 4 s with full jitter, five attempts in total.
12 clients · one base URL
Works where you already work.
- Claude Code
- Cursor
- VS Code
- Zed
- Cline
- Windsurf
- Roo Code
- OpenClaw
- OpenCode
- Anthropic SDK
- Claude for Excel
- Claude for Microsoft 365
Anything that takes a base URL and a key in the Anthropic format. The setup command configures the common ones; the docs cover the rest.
3 plans · all in ₹
Three plans, one shape.
An allowance per rolling five-hour window, a validity in days, one key.
plans · all in ₹one key · every tier · refills every 5 h
start here
Trial
Every model, every feature. Prove it on your own code.
₹499
about ₹166 a day3 days · one payment
allowance1×usage
per 5-hour window · refills to fullour pick
5×
The everyday plan. Real coding room, refilled every five hours.
₹2,999/ month
about ₹100 a day30 days · one payment
allowance5×usage
per 5-hour window · refills to fullbest value
20×
Built for agents, long sessions and whole-repo runs.
₹4,999/ month
about ₹167 a day30 days · one payment
allowance20×usage
per 5-hour window · refills to fullon every plan
modelsOpus 5.5Fable 5.1Sonnet 5Haiku 4.5
with the keytool usevisiondocumentsweb searchstreaming
paying
- Prices in ₹, GST included
- UPI, cards or net banking via Razorpay
- no auto-renewal
Prices in ₹, GST included · UPI, cards or net banking via Razorpay · no auto-renewal · refund policy
Compare every planBefore you buy
What is the 5-hour window?
Each plan has an allowance per rolling 5-hour window. Once it is spent, requests get 429 Too Many Requests, with a Retry-After header, until the window refills in full. The paid plans get 5× and 20× the Trial's usage.
Which models are on every plan?
All four tiers — Opus 5.5, Fable 5.1, Sonnet 5 and Haiku 4.5 — are included on every plan. One key, one endpoint, all models.
How do I pay?
In ₹ through Razorpay — UPI, debit or credit cards, or net banking. Prices include GST, and no plan renews by itself. Sign in, pick a plan and pay; your key is on your dashboard as soon as the payment goes through.
Is there a permanent free tier?
No. The Trial plan runs the full service — every model — for 3 days at a small cost, so you can check quality and latency on your own work before a monthly plan.
start
Point your tools at one URL.
Run the setup once, send the request you were about to send anyway, and judge it on the answer.