xAI

Grok 4.7 Build Fast API

50% under xAI's list price

Grok 4.7 Build Fast by xAI through the RelaySwitch API: $2.00 per million input tokens, $6.00 per million output tokens. Pay by card or crypto (Card, USDT, USDC, BTC, ETH, SOL). No KYC.

Input / M$2.00xAI list: $4.00
Cached input / M$0.20xAI list: $0.40
Output / M$6.00xAI list: $12.00

Specs

Model id
grok-4.7-build-fast
Developer
xAI
Context window
500K tokens
Max output
not published
Input
text

Call it

bash
1curl https://api.relayswitch.io/v1/chat/completions \
2 -H "Authorization: Bearer $RELAYSWITCH_KEY" \
3 -H "Content-Type: application/json" \
4 -d '{
5 "model": "grok-4.7-build-fast",
6 "messages": [{"role": "user", "content": "Hello"}]
7 }'

Any OpenAI SDK works: set the base URL to https://api.relayswitch.io/v1 and the model to grok-4.7-build-fast. Get a key or read the docs.

Grok 4.7 Build Fast API key and pricing

One key covers Grok 4.7 Build Fast and every other model in the catalog. Open the console with an email address, top up from $10 by card or in USDT, USDC, BTC, ETH, SOL, create a key, and send grok-4.7-build-fast as the model. No identity check, no subscription; the balance moves only when you call.

A chat message$0.00582K tokens in, 300 out
A chat turn$0.0072K tokens in, 500 tokens out
A long document$0.11250K tokens in, 2K tokens out
A million tokens$4.00500K in, 500K out

Costs at the live rates above; input and output billed separately, per token, from the prepaid balance.

Grok 4.7 Build Fast in JanitorAI, SillyTavern, Chub and Risu

One 2K-in / 300-out turn on Grok 4.7 Build Fast costs $0.0058 at today's rate; a long chat resends its history, so the price grows with the context setting. The model field takes grok-4.7-build-fast in every app; only the URL field differs.

text
1Proxy URL https://api.relayswitch.io/v1/chat/completions
2API key sk-relay-...
3Model grok-4.7-build-fast
text
1Custom Endpoint (Base URL) https://api.relayswitch.io/v1
2API key sk-relay-...
3Model grok-4.7-build-fast
text
1OpenAI Reverse Proxy URL https://api.relayswitch.io/v1
2API key sk-relay-...
3Model grok-4.7-build-fast
text
1URL https://api.relayswitch.io/v1
2API key sk-relay-...
3Model grok-4.7-build-fast

The same price on every model, ranked by use: best models for JanitorAI, SillyTavern and Chub.

No app? Chat with Grok 4.7 Build Fast in the browser at Unrestrictable, with characters, images and video and no key to paste.

FAQs

Grok 4.7 Build Fast: questions

Payment, keys and billing in short.

Open the console

A key in under a minute

Get a key

Or email hello@relayswitch.io

Run Grok 4.7 Build Fast today

Top up by card or crypto and send "grok-4.7-build-fast".

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