model releaseOpenAI
OpenAI Releases GPT-5.6 Luna Pro with Extended Reasoning Mode at $1/$6 Per Million Tokens
OpenAI has released GPT-5.6 Luna Pro, a reasoning-enhanced variant of GPT-5.6 Luna with a 1 million token context window. The model is priced at $1 per million input tokens and $6 per million output tokens, with a knowledge cutoff date of February 2026.