GPT 5.5 (Fast)
OpenAI
GPT‑5.5 understands what you’re trying to do faster and can carry more of the work itself. It excels at writing and debugging code, researching online, analyzing data, creating documents and spreadsheets, operating software, and moving across tools until a task is finished. Instead of carefully managing every step, you can give GPT‑5.5 a messy, multi-part task and trust it to plan, use tools, check its work, navigate through ambiguity, and keep going.
- Language
- File input
- Implicit caching
- Reasoning
- Tool use
- Vision
- Web search
- Realtime socket
- Fast
- Context
- 1M
- Max output
- 128K
- Input / 1M
- $12.50
- Output / 1M
- $75.00
Quickstart
Point any OpenAI-compatible client at Maxynetic Systems and pass openai/gpt-5.5-fast as the model.
curl https://api.maxynetic.com/v1/chat/completions \
-H "Authorization: Bearer $MAXYNETIC_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "openai/gpt-5.5-fast",
"messages": [{ "role": "user", "content": "Explain routing in one line." }]
}'Pricing
Billed per token with no markup on the underlying provider rate.
Input
Per 1M prompt tokens
$12.50
Output
Per 1M completion tokens
$75.00
Cache read
Per 1M cached prompt tokens
$1.25
A 1M-token prompt with 250K tokens of output costs about $31.25.