---
title: "Gemini 4 Carbon API price | RelaySwitch"
canonical: https://relayswitch.io/models/gemini-4-carbon
generated: 2026-11-12T04:44:13.144Z
source: https://api.relayswitch.io/v1/catalog
base_url: https://api.relayswitch.io/v1
---

# Gemini 4 Carbon

Gemini 4 Carbon by Google through the RelaySwitch API: $2.3529 per million input tokens, $11.7647 per million output tokens. Pay by card or crypto (Card, USDT, USDC, BTC, ETH, SOL). No KYC.

## Price per million tokens

| Input | Cached input | Output |
| --- | --- | --- |
| $2.3529 | $0.1176 | $11.7647 |

## Specs

- Model id: `gemini-4-carbon`
- Developer: Google
- Context window: not published
- Max output: not published
- Input: text

## Call it

```bash
curl https://api.relayswitch.io/v1/chat/completions \
  -H "Authorization: Bearer $RELAYSWITCH_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "gemini-4-carbon", "messages": [{"role": "user", "content": "Hello"}]}'
```

## In JanitorAI, SillyTavern, Chub and Risu

One 2K-in / 300-out turn on Gemini 4 Carbon: $0.0082 at today's rate; a long chat resends its history, so the price grows with the context setting.

| App | URL field | Value | Model |
| --- | --- | --- | --- |
| JanitorAI | Proxy URL | https://api.relayswitch.io/v1/chat/completions | gemini-4-carbon |
| SillyTavern | Custom Endpoint (Base URL) | https://api.relayswitch.io/v1 | gemini-4-carbon |
| Chub | OpenAI Reverse Proxy URL | https://api.relayswitch.io/v1 | gemini-4-carbon |
| Risu | URL | https://api.relayswitch.io/v1 | gemini-4-carbon |

API key: your sk-relay- key in every app. Ranked by use with this price on every model: https://relayswitch.io/best-models/janitorai, https://relayswitch.io/best-models/sillytavern, https://relayswitch.io/best-models/chub

No app? Gemini 4 Carbon runs as a browser chat with characters, images and video at Unrestrictable, no key to paste: https://unrestrictable.ai/chat?model=gemini-4-carbon&utm_source=relayswitch.io&utm_medium=site&utm_campaign=model-md

Keys and top-ups: https://app.relayswitch.io/console