Developers say GPT-6 Sol is a Terra-class model, not a 5.6 Sol replacement, and some are going back to 5.6
r/OpenAI (369 upvotes)·low signal
A 369-upvote r/OpenAI post says GPT-6 Sol is much less thorough than GPT-5.6 Sol and is priced like 5.6 Terra, which leaves a gap between Sol and the compute-heavy Astra. The top reply says they went back to 5.6 Sol for most tasks and plans to add a Claude Code subscription to try Opus 5.5. The Andon Labs data shows Sol is cost-efficient on long-horizon tasks, so the complaint is mostly about depth on single tasks.