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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.

Pricing

Input
$2.10per 1M tokens
Output
$10.50per 1M tokens
Cache read
$0.105per 1M tokens
Cache write
$0.1969per 1M tokens
Max output
943,718tokens

OpenRouter's price plus OpenRouter's 5% platform fee. Deference adds no markup.

opencode.json

{
  "provider": {
    "deference": {
      "npm": "@ai-sdk/openai-compatible",
      "options": { "baseURL": "https://deference.si/v1", "apiKey": "{env:DEFERENCE_API_KEY}" },
      "models": { "google/gemini-4-argon": { "limit": { "context": 1048576, "output": 943718 } } }
    }
  }
}
OpenCode, set up for Gemini 4 Argon

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