Free Gemini 4 Carbon via the Tokenator API
What the model is for
This model is available on a free plan with set usage limits. Gemini 4 Carbon is a frontier Gemini 4 model from Google for coding, agentic and complex reasoning work. It takes text, image, audio, video and file input, supports long decode of up to 1M output tokens through continuation, and controls thinking depth with low, medium and high reasoning effort.
Specification
| Full name | Free Gemini 4 Carbon |
| API ID | free-gemini-4-carbon |
| Model vendor | Gemini |
| Type | Text model (chat / completions) |
| Context window | 1.05M tokens |
| Max output | 32.8K tokens |
| Image input | yes |
| Tokenator usage multiplier | does not draw down the key limit4M tokens per day30 requests per dayresets at 00:00 UTC |
| Output token multiplier | 3.6× |
| Badge | NEW |
| Input modalities | text, image, audio, video, file |
| Supported API formats | /v1/chat/completions /v1/responses /v1/messages |
| Upstream providers | 1 |
| Current status | available |
| Data updated | 2026-11-13 |
Upstream providers
| Provider | Multiplier | Output token multiplier |
|---|---|---|
| LimitedAI | 2.8× | 3.6× |
A request goes to the first available provider by priority; if it fails, Tokenator switches to the next one.
Example request
curl https://api.tokenator.top/v1/chat/completions \ -H "Authorization: Bearer sk-your-tokenator-key" \ -H "Content-Type: application/json" \ -d '{ "model": "free-gemini-4-carbon", "messages": [{"role": "user", "content": "Hello"}] }'
Compatible tools
The model can be used in any tool that accepts a custom base URL: Claude Code, Codex CLI, OpenCode, Cursor, Cline, Kilo Code, Cherry Studio, DeepSeek Harness, Hermes, Pi, OpenClaw.
See also
FAQ about Free Gemini 4 Carbon
What is the API ID of Free Gemini 4 Carbon?
free-gemini-4-carbon — put this into the model field of your request.
What context window does Free Gemini 4 Carbon have?
1.05M tokens; max output is 32.8K tokens.
How many tokens will a request cost?
(input × 2.8×) + (output × 3.6×). See the documentation for details.
Which tools support this model?
Any tool that accepts a custom base URL: Claude Code, Codex CLI, OpenCode, Cursor, Cline, Kilo Code. Setup guides are in the integrations section.
Is Free Gemini 4 Carbon really free?
Yes. Requests to this model do not draw down your key's token limit — no multiplier is applied and your paid bundle stays untouched. A daily allowance applies instead: 4M tokens and 30 requests per day.
What is the limit on the free model and when does it reset?
The allowance — 4M tokens and 30 requests per day — is counted per key and per model, and resets at 00:00 UTC. Spending one free model's limit leaves the other free models usable.
What happens when the daily limit runs out?
The request returns 429 with the code free_model_daily_limit and a message stating what was spent and when it resets. Your paid key limit is left alone — there is no automatic switch to paid billing. The remaining allowance per free model is returned by /v1/tokens.
Do free models need a separate key?
No. The same key and the same base URL as for paid models — only the model field changes. The full list of free models is on its own page, and the mechanics are in the documentation.