Fable 5.2 在 FrontierCode 2.0 上与 Opus 5.5 打平且成本约一半
如果你在用 Claude Code 写代码，这个数据挺有用：Fable 5.2 开 Xhigh 比 Opus 5.5 拉满还强，开 High 只要一半价格就打平 Max。跑批量代码任务、在乎 API 账单的团队值得换算一下成本。
Anthropic 公布 Fable 5.2 在 FrontierCode 2.0 编码基准上的早期测试结果：High 档位的成绩与 Opus 5.5 的 Max 档位大致持平，而单任务成本约为后者的一半。Xhigh 档位则拿下了所有已发布模型中的最高分，创下该基准上的新纪录。Claude 应用和 Claude Code 中默认档位为 Medium，用户可以按需调整 effort 级别来平衡成本和表现。
从机制上看，Fable 5.2 通过档位（Medium/High/Xhigh）控制推理投入的算力，同一模型在不同档位下表现差异明显。这次公布的对比显示，用更高档位跑低一代模型，可能比用 Max 档位跑上一代旗舰更划算，对按任务计费的 API 用户意味着直接的账单变化。做编码智能体和批量代码任务的团队，现在可以在 Fable 5.2 Xhigh 与 Opus 5.5 Max 之间按成本曲线做选择。
In early testing on FrontierCode 2.0, Fable 5.2 at High effort scored about level with Opus 5.5 at Max effort, for roughly half the cost per task. At Xhigh effort, it scored the highest of any released model tested. Medium is the default in Claude apps and Claude Code.📊 290 ⚡
This report is categorized under AITOP's "Models" desk, focusing on US frontier AI labs and Silicon Valley technology leaders. Within our cross-regional analytical framework, it directly maps to US-China foundation model benchmarks and commercialization comparison and AI developer toolchains, coding agents, and engineering workflows. Key entities and technical topics under continuous tracking include Fable 5.2, Opus 5.5, Claude Code, FrontierCode.
Source attribution: curated from Claude (@claudeai). Cross-source corroboration: 11 independent sources have covered this development (including kimmonismus, 宝玉, Artificial Analysis), confirming industry-wide signal strength.
