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OpenAI

GPT-5.1

GPT-5.1 from OpenAI — 128K-token context, multimodal vision, function calling.

Context Window

128.0K

tokens
Max Output

16K

tokens
Input / 1M

$1.25

per 1M tokens
Output / 1M

$10.00

per 1M tokens

Capabilities

Vision
Function Calling
Streaming
JSON Mode
System Prompt
Tool Use

Pricing Comparison

Quick Start

curl
curl -X POST https://api.nemorouter.ai/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer sk-nemo-..." \
  -d '{
    "model": "gpt-5.1",
    "messages": [
      {"role": "system", "content": "You are a helpful assistant."},
      {"role": "user", "content": "Hello!"}
    ],
    "max_tokens": 256
  }'

Replace sk-nemo-... with your Nemo Router API key. Use gpt-5.1 as the model identifier.