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GPT-6 Astra release date and price: $10 per 1M input tokens
OpenAI released GPT-6 Astra on September 3, 2026. The API costs $10 per million input tokens and $50 per million output tokens, with a 1.05M-token context window.
GPT-6 Astra
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GPT-6 Astra vs Claude Opus 5.5: $10 vs $4 per million input tokens
Opus 5.5 costs 60% less per token and scores 58 to Astra's 57 on Artificial Analysis's index, but Astra is cheaper per index task.