OpenAI / openai/gpt-5.1
GPT-5.1 - access through LLMTR
Strong for coding, automation, and professional work with configurable reasoning. A sensible choice when you want mature GPT-5 behavior without moving to the newest flagship.
Technical specifications
| Canonical ID | openai/gpt-5.1 |
|---|---|
| Provider | OpenAI |
| Context window | 128,000 tokens |
| Operations | CHAT_COMPLETIONS |
| Modalities | text, image, audio |
Pricing
An 8% platform margin applies to credit top-ups; model usage prices are not separately marked up.
| Operation | Metric | Unit | Price |
|---|---|---|---|
| CHAT_COMPLETIONS | INPUT_TEXT | PER_1M_TOKENS | $1.25 |
| CHAT_COMPLETIONS | OUTPUT_TEXT | PER_1M_TOKENS | $10.00 |
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-5.1","messages":[{"role":"user","content":"Hello"}]}'Related models
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- GPT-5.6 Terra Pro openai/gpt-5.6-terra-pro
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- GPT-5.5 Pro openai/gpt-5.5-pro