Decisions API

Now available: GPT-6 Luna Decisions

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Google · OpenRouter / Multimodal chat

Gemini 4 Argon

Google’s reasoning model for complex software engineering, mathematical and scientific questions, and long documents. Combine text, images, video, audio and PDFs and receive a text response.

google/gemini-4-argon
Supported inputs
Text inputImage inputVideo inputAudio inputPDF input
Generated output
Text output
Try Gemini 4 ArgonAPI examplesCompare Muse and Gemini

Provider context

1,048,576

Tokens across input and output

Max response

8,192

Output tokens per request on this service

Input

$5.72

USD per million tokens

Output

$28.58

USD per million tokens

Understand mixed media in one conversation

Use the same multimodal playground as Muse Wonder to discuss images, summarize video or audio, and analyze PDFs alongside text. Gemini 4 Argon has a 1,048,576-token provider context window. This service returns text and supports complete, non-streaming chat responses.

Service limits

This relay accepts up to 40 messages and 256 KiB of text per request. Attach up to 8 files, with 4 MiB per embedded file and 8 MiB combined. The service caps each response at 8192 tokens. Provider context length and service upload limits apply separately.

Input, cache and output pricing

USD and credits per million tokens

Input, cache and output pricing · USD and credits per million tokens
UsageOpenRouterPlatform pricePlatform credits
Input$2.00$5.7257,200
Cache read$0.10$0.292,900
Output$10.00$28.58285,800

Input, cached input and output are priced separately. OpenRouter’s current 50% promotion is $2 / $0.10 / $10 per million tokens; credits use the undiscounted list prices of $4 / $0.20 / $20 under the existing 30% margin rule. Settlement uses actual prompt, cached-input and completion tokens, including provider-reported reasoning tokens in completion usage. Previous messages count on each turn. Successful requests cost at least 1 credit; failed requests release their reservation. 10000 credits = $1.

View published pricing on OpenRouter

Integrate with the chat API

Send requests to /v1/chat/completions with your account API key and model ID google/gemini-4-argon. Use a string for text or an array of content parts to combine media. Each example below is a complete request.

Manage API keys

The current relay returns a complete response with stream: false. The examples use a 256-token output limit. Replace YOUR_API_KEY and any sample media URLs or base64 data before calling.

Text input

Send a plain text message with the same model ID used in the playground.

curl https://decisions-api.dev/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "google/gemini-4-argon",
  "messages": [
    {
      "role": "user",
      "content": "Summarize the key points of this message."
    }
  ],
  "max_completion_tokens": 256,
  "stream": false
}'
Image input

Use image_url for a public HTTPS image URL or a base64 data URL. Supported embedded images: PNG, JPEG and WebP.

curl https://decisions-api.dev/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "google/gemini-4-argon",
  "messages": [
    {
      "role": "user",
      "content": [
        {
          "type": "text",
          "text": "Describe this image."
        },
        {
          "type": "image_url",
          "image_url": {
            "url": "https://example.com/image.jpg"
          }
        }
      ]
    }
  ],
  "max_completion_tokens": 256,
  "stream": false
}'
Video input

Use video_url for a public HTTPS video URL or a base64 data URL. Supported embedded video: MP4, MPEG, MOV and WebM.

curl https://decisions-api.dev/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "google/gemini-4-argon",
  "messages": [
    {
      "role": "user",
      "content": [
        {
          "type": "text",
          "text": "Summarize the events in this clip."
        },
        {
          "type": "video_url",
          "video_url": {
            "url": "https://example.com/video.mp4"
          }
        }
      ]
    }
  ],
  "max_completion_tokens": 256,
  "stream": false
}'
Audio input

Use input_audio with the recording’s base64 data and format. Do not include a data URL prefix in the data field.

curl https://decisions-api.dev/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "google/gemini-4-argon",
  "messages": [
    {
      "role": "user",
      "content": [
        {
          "type": "text",
          "text": "Summarize this recording."
        },
        {
          "type": "input_audio",
          "input_audio": {
            "data": "BASE64_AUDIO_DATA",
            "format": "wav"
          }
        }
      ]
    }
  ],
  "max_completion_tokens": 256,
  "stream": false
}'
PDF input

Use file with a PDF filename and file_data containing a public HTTPS URL or a data:application/pdf;base64,... URL.

curl https://decisions-api.dev/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "google/gemini-4-argon",
  "messages": [
    {
      "role": "user",
      "content": [
        {
          "type": "text",
          "text": "Summarize this document."
        },
        {
          "type": "file",
          "file": {
            "filename": "document.pdf",
            "file_data": "https://example.com/document.pdf"
          }
        }
      ]
    }
  ],
  "max_completion_tokens": 256,
  "stream": false
}'

Gemini 4 Argon playground

Sign in to chat with this model. Add your text or media and inspect token usage and charged credits after each response.

Gemini 4 Argon

google/gemini-4-argon

What would you like to understand?

Ask a question, attach media, or combine them. Gemini 4 Argon accepts text, images, video, audio and PDF files and replies with text.

PNG, JPEG, WebP, MP4, MPEG, MOV, WebM, WAV, MP3, AIFF, AAC, OGG, FLAC, M4A and PDF · 4 MiB per file · 8 MiB total · 8 files per conversation