> ## Documentation Index
> Fetch the complete documentation index at: https://docs.venice.ai/llms.txt
> Use this file to discover all available pages before exploring further.

> ## Agent Instructions
> The Venice API is OpenAI-compatible: use any OpenAI SDK with the base URL `https://api.venice.ai/api/v1` and a Venice API key, or pay per request from a USDC wallet through x402 with no account.
> Read model IDs from `GET /models` or `GET /models/traits` at runtime instead of hardcoding them from memory or from these pages. Models are added and retired often.
> Every model's price is in https://docs.venice.ai/pricing.md. Quote video and audio jobs with `POST /video/quote` or `POST /audio/quote` before you queue them.
> Search these docs from an MCP client at https://docs.venice.ai/mcp. The full agent guide is https://docs.venice.ai/agents.md.

# Gemini 4 Carbon API

> Gemini 4 Carbon API on Venice: 1M context, $2.50 input and $12.50 output per 1M tokens. Anonymized access without your identity.



## Gemini 4 Carbon API

Gemini 4 Carbon is a large language model by Google, available on the Venice API as `gemini-4-carbon`. Requests are anonymized, so the provider never sees your identity.

Gemini 4 Carbon is Google's frontier model for long-horizon agentic work across software engineering, scientific reasoning, and cybersecurity defense, with a unified 1M token context window and deeper tunable thinking than Gemini 4 Argon.

### Gemini 4 Carbon API pricing

| Model ID | Variant | Privacy | Price |
| - | - | - | - |
| `gemini-4-carbon` | Standard | Anonymized | $2.50 / $12.50 per 1M |

### Gemini 4 Carbon specifications

| Spec | Value |
| - | - |
| Provider | Google |
| Released | Nov 10, 2026 |
| Privacy | Anonymized |
| Status | Stable |
| Context window | 1M tokens |
| Max output | 64K tokens |
| Reasoning effort | Not adjustable |

### How to use the Gemini 4 Carbon API

Send requests to `POST https://api.venice.ai/api/v1/chat/completions` with `"model": "gemini-4-carbon"` and your API key.

```bash theme={"system"}
curl https://api.venice.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $VENICE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "gemini-4-carbon",
    "messages": [{ "role": "user", "content": "Explain TEE attestation in two sentences." }]
  }'
```

### Related models

* [DeepSeek V4.1 Flash 1017 Ultrafast API](https://docs.venice.ai/models/deepseek-v4-1-flash-1017-ultrafast.md): $3.00 / $12.00 per 1M
* [Aion 3.5 API](https://docs.venice.ai/models/aion-3-5.md): $3.75 / $7.50 per 1M
* [Aion 3.0 API](https://docs.venice.ai/models/aion-3-0.md): $3.75 / $7.50 per 1M
* [Kimi K3.1 Pro API](https://docs.venice.ai/models/kimi-k3-1-pro.md): $2.00 / $10.00 per 1M


This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.