OpenAI / openai/gpt-5.5
GPT-5.5 - access through LLMTR
OpenAI's strongest option for coding, tool-heavy agent workflows, long-context analysis, and quality-sensitive professional work. Use it when the task needs the 1.05M context window, 128K max output, and reasoning effort from none through xhigh.
Technical specifications
| Canonical ID | openai/gpt-5.5 |
|---|---|
| Provider | OpenAI |
| Context window | 1,050,000 tokens |
| Operations | RESPONSES |
| Modalities | text, image |
Pricing
A 6% platform margin applies to credit top-ups; model usage prices are not separately marked up.
| Operation | Metric | Unit | Price |
|---|---|---|---|
| RESPONSES | INPUT_TEXT | PER_1M_TOKENS | $5.00 |
| RESPONSES | CACHE_READ | PER_1M_TOKENS | $0.500000 |
| RESPONSES | OUTPUT_TEXT | PER_1M_TOKENS | $30.00 |
Example usage
With existing OpenAI SDK flows, change only the base URL and model identifier.
curl https://llmtr.com/v1/chat/completions \
-H "Authorization: Bearer llmtr-your_key" \
-H "Content-Type: application/json" \
-d '{"model":"openai/gpt-5.5","messages":[{"role":"user","content":"Hello"}]}'Related models
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- GPT-5.6 Terra Pro openai/gpt-5.6-terra-pro
- GPT-5.6 Luna openai/gpt-5.6-luna
- GPT-5.6 Luna Pro openai/gpt-5.6-luna-pro
- GPT-5.5 Pro openai/gpt-5.5-pro
- GPT-5.4 openai/gpt-5.4