GPT OSS 120B

Model details

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GPT OSS 120B

Model
accounts/fireworks/models/gpt-oss-120b
Provider
fireworks
API
anthropic-messages
Base URL
https://api.fireworks.ai/inference
Input
text
Reasoning
Yes
Context window
131,072
Max tokens
32,768
Cost / million input
$0.15
Cost / million output
$0.6
Cost / million cache read
$0
Cost / million cache write
$0

Also available from other providers

Model config JSON
{
  "providers": {
    "fireworks": {
      "apiKey": "YOUR_API_KEY",
      "models": [
        {
          "id": "accounts/fireworks/models/gpt-oss-120b",
          "name": "GPT OSS 120B",
          "reasoning": true,
          "input": [
            "text"
          ],
          "contextWindow": 131072,
          "maxTokens": 32768,
          "cost": {
            "input": 0.15,
            "output": 0.6,
            "cacheRead": 0,
            "cacheWrite": 0
          }
        }
      ],
      "api": "anthropic-messages",
      "baseUrl": "https://api.fireworks.ai/inference"
    }
  }
}