Synapse GardenSynapse Garden
Google · MultimodalReleased 2026-11-10

gemini-4-carbon

google/gemini-4-carbon id

Gemini 4 Carbon is Google’s reasoning model for complex software engineering, sustained agentic workflows, and cybersecurity defense. It combines a 1M-token context window with multimodal understanding, tool calling, and structured outputs for working across large codebases and documents. Carbon emphasizes reliable execution of multi-step plans, clearer handling of uncertainty, and identifying, validating, and remediating security vulnerabilities.

ReasoningTool useChatWeb searchStructured output
Type
Use gemini-4-carbon
# Drop-in OpenAI-compatible client
$ import { generateText } from 'ai'
$ 
$ const { text } = await generateText({
$   model: 'google/gemini-4-carbon',
$   baseURL: 'https://synapse.garden/api/v1',
$   apiKey: process.env.MG_KEY,
$   prompt: 'Why is the sky blue?',
$ })
1M
CONTEXT WINDOW
1M
MAX OUTPUT
$2.20/M
INPUT · PER M
$11.00/M
OUTPUT · PER M
PRICING

List prices, every modality.

RatePer million tokens · USD
Input$2.20/M
Output$11.00/M
Cache read$0.110/M
Honest list pricesHow we calculate prices
MORE FROM GOOGLE

Other Google models

See all 45
FAQ · GEMINI-4-CARBON

Frequently asked

01 / 04

How do I call gemini-4-carbon from my code?

Use the OpenAI or Anthropic SDK and point baseURL at https://synapse.garden/api/v1. Set model: ‘google/gemini-4-carbon’ and supply your Synapse Garden API key. No code changes beyond the base URL.

02 / 04

How much does gemini-4-carbon cost?

Input: $2.20/M per million tokens. Output: $11.00/M per million tokens. The free tier includes a million tokens every month at no cost.

03 / 04

What's the context window for gemini-4-carbon?

gemini-4-carbon supports a context window of 1M tokens, with a maximum output of 1M tokens.

04 / 04

Do I need a separate Anthropic or OpenAI account?

No. Synapse Garden is the single API surface — one key gives you OpenAI, Anthropic, Google, Meta, Mistral, DeepSeek, xAI, Cohere, and more. Billing, rate limits, and audit logs are unified.

READY

Try gemini-4-carbon in three minutes.

Sign up, create a key, drop our base URL into your existing client. The free tier includes a million tokens every month — no credit card.

Start freeQuickstart