Claude Fable 5.2 Launches on Arena Agent Evaluation
Arena announced that Anthropic's Claude Fable 5.2 has entered Arena and is available to try in Agent Arena, with scores to be announced later. Agent Arena evaluates models based on millions of real long-horizon agent tasks submitted by users worldwide; models can call web search, file system, and terminal tools to complete complex workflows, and the leaderboard uses a causal tracing method to measure a model's performance relative to the average model. Fable 5.2 is also now available in Code Arena's WebDev, Text, Vision, Search, and Document.
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SelectedAI score 72
Arena has launched the agent evaluation entry for Claude Fable 5.2, where you can first learn about how its long-horizon tasks and tool-calling scenarios are evaluated.
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View original postIntroducing 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. https://t.co/jP0AutLxXb
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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. https://t.co/jP0AutLxXb
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Claude Fable 5.2 by @AnthropicAI is now in the Arena. Head to Agent Arena to test it out, scores coming soon!
In Agent Arena, we measure models on millions of real-world, long-horizon agentic tasks from a global community of users. Models can access web search, filesystem, and terminal tools to complete complex workflows. The leaderboard measures model performance on outcomes relative to the average model using a causal tracing methodology.
Fable 5.2 is also available in Code Arena: WebDev, Text, Vision, Search and Document.