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OpenAI

GPT-6 Astra

OpenAI's most capable model for complex, demanding work.

GPT-6 Astra is OpenAI's flagship reasoning and agentic-coding model: the top of the Codex line for multi-step engineering, deep debugging and long autonomous sessions, with reasoning effort up to max. Pick it when Sol is not enough. Served by ChatGPT Pro accounts, so capacity is limited.

Best for

Codex CLIHard engineering tasksAgents

Strengths

  • ▸Strongest reasoning in the GPT line
  • ▸Complex multi-step coding
  • ▸Reasoning up to max

Use GPT-6 Astra 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": "gpt-6-astra",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
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