GPT-6 Sol reshapes the Agent Arena Pareto frontier

Arena.ai @arenaOriginally posted 2026.09.26

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GPT-6 Sol (Max) by @OpenAI has reshaped the Agent Arena Pareto frontier with a +7.7% net improvement at $0.75 median cost/task! It sits just 0.60 percentage points below Claude Fable 5 (High) (+8.3%) while costing 56% less per task ($0.75 vs. $1.72). Dive into the Agent Arena Pareto frontier details at the link below. Congrats to the @OpenAI team on this release!

This post quotes another post: “GPT-6 Sol (Max) enters Agent Arena at #6”