OpenAI
GPT-5.5
Build with affordable GPT-5.5 API on UniRoute to power coding agents, research tools, workflow automation, and high-accuracy AI applications.
Pricing
| Billing unit | UniRoute | Market |
|---|---|---|
| Input | $1.40 | $5.00 |
| Output | $8.40 | $30.00 |
per 1M tokens
About this model
GPT-5.5 Thinking API is better suited for tasks that need slower, more deliberate reasoning rather than quick surface-level responses. It works well for coding logic, technical troubleshooting, research synthesis, long-document analysis, and multi-step planning where the model needs to understand context, compare information, and produce a more carefully reasoned result. For teams that need broader options across frontier reasoning, everyday work, and high-volume usage, consider the <a href="https://uniroute.dev/gpt-5-6" rel="dofollow">GPT-5.6 API</a>, which introduces the Sol, Terra, and Luna variants in limited preview.
Deep dive
GPT-5.5 Thinking API
GPT-5.5 Thinking API is better suited for tasks that need slower, more deliberate reasoning rather than quick surface-level responses. It works well for coding logic, technical troubleshooting, research synthesis, long-document analysis, and multi-step planning where the model needs to understand context, compare information, and produce a more carefully reasoned result. For teams that need broader options across frontier reasoning, everyday work, and high-volume usage, consider the <a href="https://uniroute.dev/gpt-5-6" rel="dofollow">GPT-5.6 API</a>, which introduces the Sol, Terra, and Luna variants in limited preview.
GPT-5.5 Pro API
GPT-5.5 Pro API is designed for more complex and accuracy-sensitive workloads that require stronger answer quality, better structure, and more complete reasoning. It is a stronger option for enterprise analysis, legal and financial review, advanced data science, technical research, and high-value workflows where developers need more dependable output for difficult tasks.
Call it with one request
Works with the OpenAI SDK — just change the base URL.
curl https://api.uniroute.dev/v1/chat/completions \
-H "Authorization: Bearer $UNIROUTE_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "gpt-5-5",
"messages": [{ "role": "user", "content": "Hello!" }],
"stream": true
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