GPT 5.5 Pro (Batch)

openai/gpt-5.5-pro-batch

A chat model with a 1M-token context window, at $15.75 per million input tokens and $94.50 per million output tokens.

Details

Maker: openai
Kind: Chat
Context window: 1,000,000 tokens
Max output: 128,000 tokens
Input: $15.75 per million tokens
Output: $94.50 per million tokens
Capabilities: Reasoning, tool use, vision, file input
Takes: Text, image, pdf
Returns: Text
Zero data retention: Not on every provider
No training on requests: Yes, on every provider
Released: 2026-04-24
Newer model: openai/gpt-6.1-solReleased later by the same maker, costs no more, and lists the same capabilities. Compare the two

Call it

curl

curl https://phantom.codes/v1/chat/completions \
  -H "Authorization: Bearer $PHANTOM_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-5.5-pro-batch",
    "messages": [
      {"role": "user", "content": "Hello"}
    ]
  }'

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

Get a key Compare with another model