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o1

openaiopenai/o1

First-generation reasoning model. Uses chain-of-thought for complex problems in science, coding, and math. Succeeded by o3 — kept available for workloads pinned to o1.

Context Length
200K
Max Output
100K
Input Priceper 1M tokens
$16.20/ 1M tokens
Output Priceper 1M tokens
$64.80/ 1M tokens

Modalities

textimage→text

Capabilities

Vision

Pricing Breakdown

TypeRate
Input$16.20 / 1M tokens
Output$64.80 / 1M tokens

Supported Parameters

max_tokenstoolstool_choiceresponse_formatreasoningstop

API Usage Examples

Use the global api.therouter.ai endpoint shown below for new integrations; the legacy China accelerated endpoint is retired.

cURL
curl https://api.therouter.ai/v1/chat/completions   -H "Content-Type: application/json"   -H "Authorization: Bearer $THE_ROUTER_API_KEY"   -d '{
    "model": "openai/o1",
    "messages": [
      {"role": "user", "content": "Summarize the key points from this input."}
    ]
  }'
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