Arena.ai (@arena) · 10/21/2026, 01:42:01
OpenAI GPT-6 Series Dominates Half of Agent Arena Frontier
OpenAI's GPT-6 Luna and GPT-6.1 Sol occupy 6 of the 11 spots on the Agent Arena Pareto frontier, demonstrating superior performance across distinct cost tiers. The data highlights that adjusting reasoning effort levels, rather than switching models, is often the optimal strategy for maintaining cost-performance efficiency.
SOURCE COVERAGEFull Original Report
Arena.ai (@arena) · 2026-10-20 17
GPT-6 Luna and GPT-6.1 Sol by @OpenAI now hold 6 of the 11 spots on the Agent Arena Pareto frontier across their reasoning efforts!
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GPT-6 Luna dominates below $0.10/task, claiming 3 of the 4 optimal spots with Max, Medium and Low.
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GPT-6.1 Sol sets the frontier between 0.65/task, with the same reasoning levels on it too.
This shows why test-time scaling matters. Sometimes the best move is to switch the reasoning effort, not the model, to stay at the optimal cost/performance point.
With GPT-6 Astra (Max) also on the Pareto frontier, OpenAI models hold 7 of the 11 frontier spots with multiple reasoning levels. Congrats to the @OpenAI team!
↳ 引用 @arena (Arena.ai): Update to the Agent Arena Pareto frontier: GPT-6 Luna (Max) has landed on the Agent Arena Pareto frontier with +1.59% net improvement at a median cost of just $0.05 per task!
Luna costs 29% less than DeepSeek-V4.1-Flash and 76% less than Hy4 preview, while trailing their net-improvement scores by just 2.27 and 2.51 percentage points respectively.
Compared to other GPT models on the Pareto frontier, GPT-6 Luna (Max) costs 94% less than GPT-6 Sol (Max), and 98% less than GPT-6 Astra (Max).
Congrats to the @OpenAI team on this cost-efficient release!
