Anthropic
Anthropic

Claude Fable 5.2

Release Date 2026-11-09(Knowledge cutoff 2026-06)1M IN · 128K OUTProprietary ModelAPI availableClaude Max 5x and up
Overall4.5Top 1%
AutomationResearching
Docs & office3.5Top 23%
CodingResearching

Claude Fable 5.2 is Anthropic's most capable model in the Claude Fable line, aimed at the most demanding technical work. It accepts text, images, and files as input and replies in text, so you can hand it a long report, a screenshot, or a set of documents and ask questions about them. It can hold a book-length document in a single pass, which means you can give it an entire contract or codebase-sized material and ask about a specific clause or detail.

It suits teams and individuals working on hard coding, careful multi-step reasoning, and image-based analysis, where accuracy matters more than speed or cost. Compared with its predecessor Fable 5.1, Anthropic reports gains in coding, reasoning, and vision. It is a premium, closed model with proprietary access, so it is priced at the high end and is best reserved for tasks that justify that cost.

API cost

Official price
$8IN$40OUT
SourceAnthropic official docs

Real-world usage

No.37New entry0.3% share · 303B tokens/wk
303B11/9
SourceOpenRouterLast updated

Output Speed

Averageper 2,000 tokens
75tok/s
First Output 4.6stotal: 31.2s
SourceOpenRouterLast updated

Expert Performance Evaluation

64.6Reasoning effort: Max84.9 / 100

By effortLow 53.9Medium 56.4High 61.8Extra High 62.2Max 64.6

More about AA Intelligence Index v5

41.3%82.9 / 10086.9 / 100

More about Remote Labor Index

81.5 / 100Reasoning effort: Extra High80.1%32.1%46.2%5.0%85.1 / 10069.5%

More about LiveBench 2.0 Data Analysis

94.0%Reasoning effort: Max94.5 / 10055.7%

More about SimpleQA Verified

2510Reasoning effort: High79.2 / 10019.0%93.8%60.0%69.9%

More about ALE-Bench

35.7%Reasoning effort: Extra High99.7%95.1%100.0%100.0%88.8 / 10098.5%93.8%94.9%79.0%90.0%99.2%70.6

By effortLow 29.4%Medium 30.9%High 32.9%Extra High 35.7%Max 35.4%

More about CritPt

Can it spot the wrong step from assembly photos?Furniture AssemblyTop 3%#1
90.0%Reasoning effort: Max

More about Furniture Assembly

Specialized fields

90.5%Reasoning effort: Max1313819535

More about EBR-bench

See each evaluation’s detail page for its source and last updateData sources & removal requests