GPT-6 Sol lists at $2 per million input tokens and $10 per million output tokens, down from GPT-5.6 Sol's promotional $4 and $20. GPT-6 Luna lists at $0.10 and $0.50, down from $0.20 and $1.20.
In the News: September 22, 2026 (Extra 3)
OpenAI halves API prices for GPT-6 Sol and Luna and says reasoning-effort and tool changes no longer break the prompt cache.
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