GPT-6.1 Sol beats Opus 5.5 on cost-performance balance, argues dev who caught Opus in logic traps
haider1 · x · 2026-10-25
The author argues GPT-6.1 Sol remains the best model for cost-performance balance, citing an Artificial Analysis comparison: Sol's Max tier costs just $0.72/task (GDPval-AA 1,596, 38k tokens), far cheaper than GPT-6 Astra ($3.26 max) and Opus 5.5 ($5.98 max, 119k tokens, but the highest raw scores with Intelligence 58 and 81-96 tok/s output). In the author's testing, Opus 5.5 — Anthropic's strongest model yet — still falls into logical traps, so he reserves it for specific reviewing tasks rather than daily driving.
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