Benchmark Almanac

Phylogenetics (Anthropic)

Claude Opus 4.7 79.6% leads since April 2026
Only in system cards

Models analyze phylogenetic data and tree diagrams, testing quantitative reasoning about tree structure and visual interpretation.

In-house Anthropic evaluation. The tasks are not public.

Made by
Anthropic
Released
February 2026
Kind
Research science
Level
Expert
Scored
Checked automatically
Answers
Short answer
Tasks
Kept private
Strongest model tested
Claude Opus 4.7 #30 on the capability index
Last in a system card
April 2026
Last model added
April 2026
3
Models scored in lab cards
3
System cards report it, from 1 lab

Claude Opus 4.7 leads with 79.6% among models released by April 2026

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.

The newest model with a score here came out in April 2026, and nobody has reported a newer one. Among the 20 highest-ranked models on the capability index, these have no score yet:

  1. 79.6 Claude Opus 4.7
  2. 61.3 Claude Opus 4.6
  3. 49.1 Claude Sonnet 4.6
  1. 1 Claude Opus 4.7 79.6%
  2. 2 Claude Opus 4.6 61.3%
  3. 3 Claude Sonnet 4.6 49.1%

Source: Labs’ model cards

#ModelScoreSettingDateSource
1 Claude Opus 4.7 79.6% Apr 2026 Lab model card
2 Claude Opus 4.6 61.3% Feb 2026 Lab model card
3 Claude Sonnet 4.6 49.1% Feb 2026 Lab model card

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

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

Anthropic
Lab claims Not tested since Apr 2026
Claude Opus 4.7 79.6%

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% 2026 Near the ceiling (85%) Claude Opus 4.7 Claude Opus 4.6 0% 20% 40% 60% 80% 100% 2026 Near the ceiling (85%) Claude Opus 4.7 Claude Opus 4.6

Source: Labs’ model cards

Labs report it only in system cards

We read the headline results of 522 launch posts from 52 labs, and none of them list this benchmark. Some system cards do, below.

3 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
Apr 16, 2026 Claude Opus 4.7 system card 79.6 Phylogenetics, no extended thinking (8.13.5) Capabilities
Feb 17, 2026 Claude Sonnet 4.6 system card 49.1 Phylogenetics, no extended thinking (2.21.1) Capabilities
Feb 5, 2026 Claude Opus 4.6 system card 61.3 Phylogenetics, no extended thinking (2.22) Capabilities

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