Benchmark Almanac

WANDR

Claude Fable 5.2 82.1% leads since November 2026
In use

500 wide-search tasks: find tens to hundreds of entities and facts, then return structured records with citations.

Made by
Perplexity
Released
July 2026
Kind
Deep research
Level
Everyday
Scored
Graded by a model
Answers
Agent task
Tasks
All public
Strongest model tested
Claude Fable 5.2 #1 on the capability index
Last in a launch post
November 2026
Last model added
November 2026
4
Models scored in lab cards
1
Launch post lists it, from 1 lab
4
System cards report it, from 1 lab

Claude Fable 5.2 leads with 82.1%

Best score per model as labs report them in their own cards. Labs pick their own settings, so these compare less cleanly than independent runs.

  1. 1 Claude Fable 5.2 82.1%
  2. 2 Claude Opus 5.5 72.3%
  3. 3 Claude Sonnet 5.5 70%
  4. 4 Claude Haiku 5.5 49.9%

Source: Labs’ model cards

#ModelScoreSettingDateSource
1 Claude Fable 5.2 82.1% Nov 2026 Lab model card
2 Claude Opus 5.5 72.3% Sep 2026 Lab model card
3 Claude Sonnet 5.5 70% Sep 2026 Lab model card
4 Claude Haiku 5.5 49.9% Oct 2026 Lab model card

2 models have held number one in labs’ own numbers since its release in July 2026

Lab claims count from the day the card came out, independent runs from the model’s release.

Anthropic
Lab claims 2 leaders

Source: Labs’ model cards

Scores over time

All the scores we have, one dot each, so a model tested at several settings appears more than once.

Reported by the lab in its model card Best so far
0% 20% 40% 60% 80% 100% 2027 Near the ceiling (85%) Claude Fable 5.2 Claude Opus 5.5 0% 20% 40% 60% 80% 100% 2027 Near the ceiling (85%) Claude Fable 5.2 Claude Opus 5.5

Source: Labs’ model cards

One lab put it in a launch post in the last six months

Launch posts from every lab that has listed it, one tick per post. Tall colored ticks include it, and short gray ones leave it out.

Anthropic
DateLaunch postScoreAs the post writes it
Nov 9, 2026 Claude Fable 5.2 82.1 Agentic search WANDR (relaxed score), max effort (launch table and Table 8.1.A)

4 system cards report it, from 1 lab

Besides launch posts, we read the system cards, model cards and technical reports labs publish with a release. They report far more, including safety and frontier-risk tests.

DateDocumentScoreAs the document writes itSection
Nov 9, 2026 Claude Fable 5.2 system card 82.1 WANDR relaxed score, soft F1, max effort, 500 tasks, 980k-token budget, offline web index and Claude Opus 4.6 judge. Not comparable with the original live-web harness (Table 8.1.A and Section 8.11.3) Capabilities
Oct 7, 2026 Claude Haiku 5.5 system card 49.9 WANDR, soft F1 at max effort, frozen web index, printed on chart (Figure 8.8.3.A) Capabilities
Sep 28, 2026 Claude Sonnet 5.5 system card 70 WANDR soft F1 at max effort, modified offline version (8.11.3, Figure 8.11.3.A) Capabilities
Sep 22, 2026 Claude Opus 5.5 system card 72.3 WANDR soft F1 at max effort, modified offline version with frozen index, printed on chart (8.11.3, Figure 8.11.3.A) Capabilities

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