YepAPI
GoogleText Generation/v1/ai/chatReasoning

Gemini 4 Argon API

Access Gemini 4 Argon through one API key. Google Gemini 4 Flagship Reasoning.

Gemini 4 Argon is Google's flagship reasoning model, built for complex software engineering, deep mathematical and scientific problem solving, and autonomous multi-step agents. Pick it for long-horizon agents, hard technical questions and multimodal analysis across text, images, audio, video and documents.

Full Docs Get API Key — Free $5 Credit

No credit card required. Takes 30 seconds.

Gemini 4 Argon API pricing

Pay per request from your YepAPI balance — no subscription, no monthly minimum. Prices updated October 23, 2026.

Token typePrice
Input$2.95 / 1M tokens
Output (incl. reasoning)$14.77 / 1M tokens
Context window1.0M tokens
What it costsPer jobPer 1,000
Chat reply1K input + 500 output tokens$0.01$10.33
RAG answer8K input + 800 output tokens$0.035$35.42
Agent step with tools30K input + 2K output tokens$0.118$118.04
Long document summary100K input + 2K output tokens$0.325$324.54

2,400+

Developers

1.2M+

API calls served

100+

Endpoints

$0.01

Per call

Yep, that's it.

Try it live

Send a message and see Gemini 4 Argon respond in real time.

POST/v1/ai/chat

Maximum tokens in the response.

Real-time tokens

Hit "Send Request" to see the response

Gemini 4 Argon specs

ProviderGoogle
Model IDgoogle/gemini-4-argon
Endpoint/v1/ai/chat
TypeText Generation
Context window1.05M tokens
Max output944K tokens
ReasoningYes
OpenAI-compatibleYes — /v1/ai/chat/completions

How to get a Gemini 4 Argon API key

  1. 1

    Create a free account

    Sign up at yepapi.com with Google or email. It takes about 30 seconds and needs no card.

  2. 2

    Create an API key

    Open the dashboard, go to API Keys and create a key. Copy it — it starts with yep_sk_.

  3. 3

    Call Gemini 4 Argon

    Send a request to /v1/ai/chat with the x-api-key header and model "google/gemini-4-argon".

  4. 4

    Pay as you go

    Usage is billed per request from your balance. Top up any amount; there is no subscription.

Strengths

✓
Gemini 4 generation

Google's newest flagship, a step up from the Gemini 3.x line for reasoning and agentic work.

✓
Fully multimodal input

Takes text, images, audio, video and files in one request.

✓
1M token context

Reads up to 1,048,576 tokens, so whole repositories or hours of transcripts fit in one call.

✓
Built for agents

Designed to keep context across long multi-step tasks with reliable tool calling.

Quick start

Copy this snippet and start making calls with Gemini 4 Argon.

const res = await fetch('https://api.yepapi.com/v1/ai/chat', {
  method: 'POST',
  headers: {
    'x-api-key': 'YOUR_API_KEY',
    'Content-Type': 'application/json',
  },
  body: JSON.stringify({
    "model": "google/gemini-4-argon",
    "messages": [
      {
        "role": "user",
        "content": "Explain API gateways in 2 sentences."
      }
    ],
    "maxTokens": 256
  }),
});
const { data } = await res.json();
console.log(data.message.content);

Gemini 4 Argon vs similar models

Every model below runs on the same API key — switch by changing the model ID.

ModelProviderPriceContext
Gemini 4 ArgonGoogle$2.95 in / $14.77 out per 1M1.0M
Gemma 4 26BGoogle$0.13 in / $0.44 out per 1M262K
Gemini 2.5 Flash LiteGoogle$0.15 in / $0.59 out per 1M1.0M
Gemma 4 31BGoogle$0.30 in / $0.59 out per 1M262K
Gemini 3.1 Flash LiteGoogle$0.37 in / $2.22 out per 1M1.0M
Gemini 2.5 FlashGoogle$0.44 in / $3.69 out per 1M1.0M
Nemotron 3 SuperNVIDIA$0 in / $0 out per 1M262K
Qwen3.7 FlashQwen$0.04 in / $0.19 out per 1M1M

Why use Gemini 4 Argon through YepAPI?

✓One API key for all models — no separate accounts
✓OpenAI SDK compatible — just change the base URL
✓No monthly minimums — pay per token
✓Switch models with one line of code
✓Full provider passthrough — citations, search results, and all extras included
✓Streaming and non-streaming support on every model
✓Works with Cursor, Claude, LangChain, and any LLM tool
✓Unified billing across all providers

Gemini 4 Argon API — pricing, context window & access

Gemini 4 Argon is Google's flagship reasoning model, built for complex software engineering, deep mathematical and scientific problem solving, and autonomous multi-step agents. It pairs a 1,048,576-token context window with up to 943,718 output tokens per response, at $2.95 per 1M input and $14.77 per 1M output tokens through YepAPI.

Through YepAPI you call Gemini 4 Argon on an OpenAI-compatible endpoint with a single key — the same key that reaches GPT-6, Claude, Gemini, Grok and the SEO, SERP and scraping APIs. Input: text, images, audio, video, files.

What is Gemini 4 Argon?

Gemini 4 Argon is Google's flagship reasoning model, built for complex software engineering, deep mathematical and scientific problem solving, and autonomous multi-step agents. It is the first Gemini 4 model and accepts the widest range of inputs on the platform: text, images, audio, video and files. It accepts text, images, audio, video, files as input, handles up to 1,048,576 tokens of context and returns up to 943,718 output tokens per call.

Build with Gemini 4 Argon via YepAPI

YepAPI serves Gemini 4 Argon on the OpenAI-compatible /v1/ai/chat endpoint. Point your base URL at YepAPI, add your key, and set the model string to gemini-4-argon (or the full google/gemini-4-argon). Function calling, structured outputs and reasoning settings pass straight through, and switching to any other model on the platform is a one-string change per request.

Gemini 4 Argon API pricing — $2.95 / 1M input, $14.77 / 1M output

Gemini 4 Argon costs $2.95 per 1M input tokens and $14.77 per 1M output tokens through YepAPI, pay per token with no minimums. Failed calls are never charged, and every request is itemised in your dashboard API Logs.

Gemini 4 Argon use cases

Pick it for long-horizon agents, hard technical questions and multimodal analysis across text, images, audio, video and documents.

Try Gemini 4 Argon free

Every new YepAPI account includes $5 in free credit with no card required — enough to test Gemini 4 Argon on your own prompts before committing to paid usage. Create an account, copy your key, and call gemini-4-argon right away.

Start generating in 30 seconds

$5 free credit on signup. No credit card required. Pay per call.

Get API Key

What developers say

“Switched from SerpAPI and cut our SERP costs by 80%. Same data quality, way simpler billing.”

Marcus T.

SEO Platform Founder

“One API key for AI models, SERP data, and web scraping. Saved us from managing 4 separate providers.”

Priya S.

Full-Stack Developer

“The $5 free credit let us prototype our entire rank tracking feature before committing. No other API does that.”

Jake R.

Indie Hacker

Frequently asked questions

Gemini 4 Argon is Google's flagship reasoning model, built for complex software engineering, deep mathematical and scientific problem solving, and autonomous multi-step agents. Pick it for long-horizon agents, hard technical questions and multimodal analysis across text, images, audio, video and documents.

Gemini 4 Argon costs $2.95 per 1M input tokens and $14.77 per 1M output tokens through YepAPI, billed per request with no monthly fee. For example, a chat reply (1K input + 500 output tokens) costs about $0.01.

Sign up at yepapi.com (Google or email, about 30 seconds), open the dashboard and create an API key. The same key works for Gemini 4 Argon and every other model — no separate Google account or waitlist.

New YepAPI accounts in most countries get free signup credit, enough to test Gemini 4 Argon without a card. After that you pay per request at the rates above — there is no subscription.

Use "google/gemini-4-argon" as the model on /v1/ai/chat. The short alias "gemini-4-argon" also works.

Yes. Point the OpenAI SDK at https://api.yepapi.com/v1/ai with your YepAPI key and set model to "google/gemini-4-argon". Streaming works the same way, so existing OpenAI code only needs the base URL and key changed.

Gemini 4 Argon supports a 1.0M token context window with up to 944K output tokens per request.

Ready to use Gemini 4 Argon?

$5 free credit on signup. No credit card required. Pay per call.

Get API Key — Free $5 Credit Read Docs

Explore more models

Gemini 2.5 Pro

Google

Access Gemini 2.5 Pro through one API key. Google's most capable model with 1M context.

1.0M ctx$1.85/M in

Gemini 3.8 Flash

Google

Access Gemini 3.8 Flash through one API key. Google Most Intelligent Flash.

1.0M ctx$1.22/M in

Gemma 4 31B

Google

Access Gemma 4 31B through one API key. Google's open-weight model at ultra-low cost.

262K ctx$0.30/M in

Mistral Small 4

Mistral

Access Mistral Small 4 through one API key. Europe's leading AI model at a great price.

262K ctx$0.22/M in

Mistral Large 4

Mistral

Access Mistral Large 4 through one API key. Mistral Mistral Frontier Multimodal.

1.0M ctx$2.01/M in

Claude Fable 5.1

Anthropic

Access Claude Fable 5.1 through one API key. Anthropic Frontier Agentic Coding & Knowledge Work.

1M ctx$14.77/M in

More Text Generation models

All Google models →All AI models →