Anthropic 发布 Claude Fable 5.2（Max），登顶 Agent Arena
Anthropic 的新模型 Fable 5.2 在 Agent Arena 拿了第一，净改进 30.4%，比第二名 Opus 5.5 高一大截，API 价格还降了 20%。写代码和跑智能体的开发者可以关注，成本党也可以对比下 Gemini 4 Carbon。
Anthropic 发布 Claude Fable 5.2（Max），在 Agent Arena 榜单上以 +30.4% 的净改进登顶第一，约为第二名 Claude Opus 5.5（+19.5%）的 1.6 倍。评测基于全球社区贡献的 4700 个真实智能体会话，该模型同时在 Code、Chat、Work 三个分类均列第一。
相比上一代 Fable 5.1（Max），排名从第 5 升至第 1，净改进从 +14.8% 提升至 +30.4%，单任务中位成本从 $7.7 降到 $7.3。细分信号上，用户满意度相关指标提升最大：Praise vs. Complaint 达 +73%（第二名仅 +41%），Steerability +33%，Confirmed Success +22%。API 定价从每百万输入/输出 tokens $10/$50 降至 $8/$40，降幅 20%。
横向对比上，Gemini 4 Carbon（High）以 +17.0% 净改进列第三但单任务成本仅 $1.5，GPT-6-Astra（Max）以 +14.5% 列第六、成本 $6.0/任务。与 Fable 5.1 相比，Code 从第 6 升至第 1（+19.8%），Work 从第 4 升至第 1（+15.8%），Chat 从第 6 升至第 1（+12.0%）。
Big news: Claude Fable 5.2 (Max) by @AnthropicAI takes #1 in Agent Arena with an unprecedented lead: +30.4% net improvement, about 1.6x the #2 model Opus-5.5, across 4.7k real-world agentic sessions from our global community. It's also #1 in Code, Chat and Work. A major leap over Claude Fable 5.1 (Max) - Rank: #5 → #1 , Net improvement: +14.8% → +30.4% - Median cost per task: $7.7 → $7.3 (6% lower). The API pricing $10/$50 → $8/$40 per million input/output tokens (20% lower) vs. The Frontiers - #1 Claude Fable 5.1 (Max): +30.4% | $7.3/task - #2 Claude Opus 5.5 (Max):+19.5%) | $5.5/task - #3 Gemini 4 Carbon (High):+17.0%) | $1.5/task - #6 GPT-6-Astra (Max): +14.5% | $6.0/task Breaking down performance across signals: Fable 5.2 improves over 5.1 across all four reported signals, with particularly large gains in user satisfaction and steerability. - #1 Praise vs. Complaint , +73%, biggest jump vs +41% the next model. - #1 Steerability: +33% - #1 Confirmed Success: +22% - #3 Bash Reliability: +14% #1 across all major categories - #1 Code: +34% - #1 Work: +31% - #1 Chat: +27% - Versus Fable 5.1: Code #6 → #1 (+19.8 %), Work #4 → #1 (+15.8 %), Chat #6 → #1 (+12.0%). Huge congrats to the @AnthropicAI team on this incredible release! Claude @claudeai Introducing Claude Fable 5.2 and Claude Mythos 5.2, designed to tackle the most daunting technical challenges. They’re capable collaborators on ambitious projects in many fields, and show improvements in areas like coding, reasoning, and vision.
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 Claude Fable 5.2, Anthropic, Agent Arena, 智能体.
Source attribution: curated from lmarena.ai (@lmarena_ai).
