Chartography — No Tools
Chart understanding and reasoning evaluated without tool access. Kept separate from chartography-with-tools because tool use changes the task. Anthropic's Fable 5.2 system card reports max-effort, five-run averages on its own runs.
Models ranked
1
tracked on this benchmark
Score band
73.4 – 73.4
best → lowest tracked
Snapshot trend
—
need ≥2 snapshots
Leaderboard
Tracked models ranked by Accuracy (higher is better).
Configuration: claude-fable-5-2 (max effort, mean of 5 runs, no tools)
Notes: Anthropic self-reported (lab-published). System card + launch table, retrieved 2026-11-09. Does not move /best rankings (self-reported / raon rule). Launch table and §8.13.1: 73.4% without tools at max effort, average of five runs, Anthropic's own runs. Medium-effort 66.4% is mentioned in the launch-post chart caption and is not this row. New slug: catalog only had chartography-with-tools.
How to read this benchmark
This benchmark scores models where higher is better. Use scores for directional filtering and shortlisting, not universal quality ranking; then validate pricing, context window, provider availability, and fit for your workload.
Trust this score when
- There is a fresh timestamped snapshot (or multiple snapshots) for this benchmark.
- The model list covers the same version family you can actually deploy today.
- Top candidates overlap with your required routing and feature requirements.
Be cautious when
- There is only one benchmark snapshot or the dataset appears stale.
- The benchmark metric direction is opposite of your decision objective.
- The score difference between options is narrow and likely within implementation variance.
Related benchmarks
Last reviewed: Nov 9, 2026