reasoning mode

OpenAI has released GPT-6.1 Sol Pro, which runs the same underlying GPT-6.1 Sol model with reasoning.mode set to 'pro' for higher-accuracy responses on complex tasks. It costs several times more per request than standard GPT-6.1 Sol and is priced at $2/$10 per 1M input/output tokens with a 1.1M token context window.

GPT-6 Astra Pro, now listed on OpenRouter, is the existing GPT-6 Astra model configured to run with reasoning.mode set to 'pro' for higher-quality output on complex tasks. It carries a 1M-token context window and tiered pricing from $5/$25 to $20/$100 per million input/output tokens depending on the serving tier.