GPT-5.6 offers several balances of capability and cost

OpenAI released the GPT-5.6 family, with Sol as its flagship, Terra as a balanced option, and Luna aimed at lower-cost work. The announcement emphasizes token efficiency, tool use, and professional tasks, and describes an ultra setting that coordinates parallel agents for demanding work.

Context

Choosing a model becomes a workload decision rather than a single ranking. The useful comparison includes the completed result, review time, and total usage across retries or parallel workers. A lower token count is helpful only if the outcome still meets the same requirements.