xAI

Grok 4.5 Heavy

Grok 4.5 Heavy by xAI through the RelaySwitch API: $0.40 per million input tokens, $1.20 per million output tokens. Pay by card or crypto (Card, Apple Pay, PayPal, USDT, USDC, BTC, ETH, SOL). No KYC.

Input / M$0.40per million tokens
Cached input / M$0.06per million tokens
Output / M$1.20per million tokens

Specs

Model id
grok-4.5-heavy
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-4.5-heavy",
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-4.5-heavy. Get a key or read the docs.

More from xAI

FAQs

Grok 4.5 Heavy: 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 4.5 Heavy today

Top up by card or crypto and send "grok-4.5-heavy".

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