GPT-5.6 Sol is the flagship model in OpenAI's GPT-5.6 series. $2.50 per million input tokens, $15 per million output tokens. 1,050,000 token context window, maximum output of 128,000 tokens. Higher uptime with 3 providers. Includes independent benchmarks from Artificial Analysis.
It’s excellent if you can keep it in hand, but holy hell is it tough to get it to stay between the lines. I’ve gone back to 5.5, it’s just way less handholding. And 5.5 gets things done well enough, in about a tenth of the time.
Sol is good on Ultra for orchestrating if you specify the models you want it to use for subagents. Other than that, it’s too much work.
It’s excellent if you can keep it in hand, but holy hell is it tough to get it to stay between the lines. I’ve gone back to 5.5, it’s just way less handholding. And 5.5 gets things done well enough, in about a tenth of the time.
Sol is good on Ultra for orchestrating if you specify the models you want it to use for subagents. Other than that, it’s too much work.