Long context

Gemini 4 Carbon API pricing

Google's Gemini series — very long context windows and strong multimodal input.

Model IDgoogle/gemini-4-carbon

ChatStreamingTool callingVision

Get API Key Run your first request

Call summary

Input

$2.00$0.84/ 1M tokens

Cache write $0.84

Cache read $0.84

Output

$10.00$4.20/ 1M tokens

Context Window

1.05M

API Endpoints

Gemini 4 Carbon API endpoints

One API key — this model is served on the endpoint below.

POST/v1/chat/completionsOpenAI-compatible · Works for every model

Chat Completions reference

Call Gemini 4 Carbon from your code

Your API key works on this endpoint.

Endpoint

/v1/chat/completions

Model ID

google/gemini-4-carbon

Request example

bash

curl -X POST \
  https://api.router.one/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "google/gemini-4-carbon",
    "messages": [
      {"role": "user", "content": "Hello!"}
    ]
  }'

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Production reliability

Privacy-safe aggregates from real Router One model calls, so you can assess stability and response latency before integrating.

Successful response share

100.00%

Success 2xx

100.00%

Rate limit 429

0.00%

Server 5xx

0.00%

TPS

93.86

tokens/s

Avg. time to first token

23.23 s

Avg. latency

46.05 s

Includes production requests ending in 2xx, 429, or 5xx. Average latency uses successful requests; time to first token and TPS require complete observations from successful streams. Public thresholds are 100 requests and 5 independent principals.

Updated Nov 11, 2026, 9:15 PM UTC

More Gemini models on Router One

21 other Gemini models on the same gateway and API key — each page lists endpoints, posted price, and context window.

8 channel versions

Gemini 4 Carbon compared with other models

Spec and price matchups against peer models.

Gemini 4 Carbon vs Gemini 4 Argon

Gemini 4 Carbon at a glance

Gemini 4 Carbon (model ID google/gemini-4-carbon) is a Gemini-series text model on Router One. Posted rate: $0.84 in / $4.20 out per 1M tokens (was $2.00 in / $10.00 out). Router One subscriptions include Gemini 4 Carbon in the Premium models allowance: Pro 300, Max 1,000, Ultra 5,000 requests per 30-day cycle. Usage beyond the allowance bills the wallet at posted rates. Context window: 1.05M tokens. Accepts text, image; returns text. Endpoint: POST /v1/chat/completions (OpenAI-compatible).

Gemini 4 Carbon FAQ

How much does Gemini 4 Carbon cost on Router One?

Gemini 4 Carbon is billed per token on Router One: $0.84 in / $4.20 out per 1M tokens, pay as you go.

Is Gemini 4 Carbon included in Router One subscriptions?

Router One subscriptions include Gemini 4 Carbon in the Premium models allowance: Pro 300, Max 1,000, Ultra 5,000 requests per 30-day cycle. Usage beyond the allowance bills the wallet at posted rates.

Which endpoints serve Gemini 4 Carbon?

Gemini 4 Carbon is served on POST /v1/chat/completions (OpenAI-compatible). Any Router One API key works there.

What is Gemini 4 Carbon's context window?

Gemini 4 Carbon accepts up to 1.05M tokens of context per request on Router One.

Start using Gemini 4 Carbon

Create an API key and call Gemini 4 Carbon at $0.84 in / $4.20 out per 1M tokens on Router One — pay as you go, with per-request cost and latency visibility.

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