Benchmark Almanac

Phylogenetics (Anthropic)

Claude Opus 4.7 79.6% leads since Apr 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 Feb 2026 Research science Tasks kept private Last in a system card Apr 2026 Last model added Apr 2026
Level
Expert Specialists with years of training, often over hours of work
Scored
Checked automatically A program checks the result against an answer key, unit tests or the expected final state.
Answers
Short answer A number, word or short string matched to a key.
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 Apr 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 Apr 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%
#ModelScoreSettingDateSource
1 Claude Opus 4.7 79.6% Apr 2026 Model card
2 Claude Opus 4.6 61.3% Feb 2026 Model card
3 Claude Sonnet 4.6 49.1% Feb 2026 Model card

2 models have held number one since its release in Feb 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%

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

Labs report it only in system cards

We read the headline results of 479 launch posts from 51 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
16 Apr 2026 Claude Opus 4.7 system card 79.6 Phylogenetics, no extended thinking (8.13.5) Capabilities
17 Feb 2026 Claude Sonnet 4.6 system card 49.1 Phylogenetics, no extended thinking (2.21.1) Capabilities
5 Feb 2026 Claude Opus 4.6 system card 61.3 Phylogenetics, no extended thinking (2.22) Capabilities

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