GPT-6.1 Sol matches Opus 5.5 within 4 points at one-eighth the cost per task
ArtificialAnlys · x · 2026-10-28
Per-task costs diverge sharply at the frontier: Claude Opus 5.5 (max) costs $10.04 per Intelligence Index task, GPT-6 Astra (max) $6.24, and GPT-6.1 Sol (max) just $1.27 — scoring within 4 points of Opus 5.5 at roughly one-eighth the cost, making it the standout value pick among flagship models.
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