GPT OSS 120B

openai/gpt-oss-120b

A chat model with a 131K-token context window, at $0.105 per million input tokens and $0.525 per million output tokens.

Details

Maker: openai
Kind: Chat
Context window: 131,072 tokens
Max output: 131,072 tokens
Input: $0.105 per million tokens
Output: $0.525 per million tokens
Capabilities: Reasoning, tool use
Takes: Text
Returns: Text
Zero data retention: Not on every provider
No training on requests: Yes, on every provider
Released: 2025-08-05
Newer model: openai/gpt-6-lunaReleased later by the same maker, costs no more, and lists the same capabilities. Compare the two

Description

Balanced open-weight reasoning MoE

Call it

curl

curl https://phantom.codes/v1/chat/completions \
  -H "Authorization: Bearer $PHANTOM_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-oss-120b",
    "messages": [
      {"role": "user", "content": "Hello"}
    ]
  }'

Set PHANTOM_KEY to your key. Any OpenAI client works with the base URL https://phantom.codes/v1.

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