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Ox Alpha

Free 1M-context reasoning model for long coding sessions.

Ox Alpha is a reasoning model aimed at coding and sustained agentic work, with a 1M token context window and up to 128K tokens of output. It reads images alongside text and calls tools. The model is published under OpenRouter's Stealth programme, so its developer is not disclosed and the preview can end without notice.

Best for

Long coding sessionsAgentsLarge-codebase review

Strengths

  • ▸1M-token context
  • ▸Reasoning
  • ▸Tool calling

Use Ox Alpha via AnyModel

One OpenAI-compatible endpoint — just set the model id:

curl https://anymodel.org/v1/chat/completions \
  -H "Authorization: Bearer $ANYMODEL_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "am/ox-alpha",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
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