Arena 分析 Agent Arena 每任务成本：GPT-6.1 Sol 为 1.91 美元
Lower cost per task doesn’t always come from lower token prices.
Arena 在 Agent Arena 上统计，OpenAI 的 GPT-6.1 Sol (Max) 每任务成本为 1.91 美元，比 Claude Opus 5.5 (Max) 的 12.51 美元低 85%，比 GPT-6 Astra (Max) 的 14.93 美元低 87%。Arena 指出，这两项成本优势的来源并不相同：相对 Astra，Sol 的优势主要来自更低的 token 单价；相对 Opus，则主要来自每任务消耗更少的 token。每任务成本按输入、输出和缓存读取 token 的数量乘以各自单价计算，Arena 通过对比价格与 token 用量来定位成本下降的原因。
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原文拆解了每任务成本的构成，说明低价既可能来自 token 单价，也可能来自更少的 token 消耗。
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正文
Lower cost per task doesn’t always come from lower token prices.
On Agent Arena, GPT-6.1 Sol (Max) by @OpenAI costs $1.91 per task: - 85% less than #1 Claude Opus 5.5 (Max) by @AnthropicAI at $12.51 - 87% less than #3 GPT-6 Astra (Max) by @OpenAI, at $14.93
But these savings come from different places.
Against Astra, Sol’s cost advantage comes primarily from lower token prices. Against Opus, it comes primarily from using fewer tokens per task.
How do we derive this?
Agent Arena tracks real costs of users’ tasks. Cost per task is the tokens a model uses times the price of each token, across input, output and cache-read tokens. By comparing pricing and token counts, we can identify what drives the cost reductions.