Claude Opus 5.5 vs GPT-6.1 Sol for coding agents

Originally published on the QuickSilver Pro blog. On QuickSilver Pro, Claude Opus 5.5 costs $1.00 / $5.00 per million tokens and GPT-6.1 Sol costs $2.00 / $10.00. Both are sold for agentic coding, so for anyone running a coding agent the question is which one gets the work done, how fast, and for how much. We tested this on 2026-10-27. Both models... Weiterlesen: Claude Opus 5.5 vs GPT-6.1 Sol for coding agents