Who makes Claude Plugin Evals?

Claude Plugin Evals is made by Anthropic.

Does Claude Plugin Evals work in the EU?

Unverified. No explicit evidence found. Last verified 14 Nov 2026.

Where was Claude Plugin Evals shown?

In 1 creator video by Matthew Berman. Most recently by Matthew Berman on 23 Sept 2026, at 30:14 in "Anthropic went CRAZY (Opus 5.5)".

Claude Plugin Evals

by Anthropic

Anthropic tooling to check whether Claude skills and plugins are up to date with the newest model and update them.

UnverifiedPlatforms & Infra CodingLibrary

Updated 14 Nov 2026EU status checked 14 Nov 2026Last shown 23 Sept 2026

Claude Plugin Evals at a glance

What is Claude Plugin Evals?: Claude Plugin Evals is a library from Anthropic. Anthropic tooling to check whether Claude skills and plugins are up to date with the newest model and update them.
Who makes Claude Plugin Evals?: Claude Plugin Evals is made by Anthropic.
Does Claude Plugin Evals work in the EU?: Unverified. No explicit evidence found. Last verified 14 Nov 2026.
How much does Claude Plugin Evals cost?: Pricing unknown.
Where was Claude Plugin Evals shown?: In 1 creator video by Matthew Berman. Most recently by Matthew Berman on 23 Sept 2026, at 30:14 in “Anthropic went CRAZY (Opus 5.5)”.

Sources: creator videos at the linked timestamps. EU status is information, not legal advice; see how we check.

About

Claude Plugin Evals is a tool from Anthropic that was reported as released alongside Opus 5.5. According to a creator review, it lets users check whether their skills and plugins still work well with the newest Claude model and update them so they do not constrain the model's capabilities.

No official page could be retrieved, so details on how it is accessed, its interface, what it measures and its exact name are unconfirmed. The name and description rest on a single creator statement. Pricing, licensing and source availability are unknown.

Key features

Checks whether skills and plugins are up to date with the newest Claude model
Helps update skills and plugins so they don't limit the model
Released alongside Opus 5.5 (per creator report)

1 moment

As seen on YouTube

Watch the moment: the exact second top creators show it. Videos load only when you press play, via youtube-nocookie.com.

Matthew Berman23 Sept 2026

Anthropic went CRAZY (Opus 5.5)

Released alongside Opus 5.5. It lets users check whether their skills and plugins are up to date with the newest model and update them so they don't constrain it.

30:14Open on YouTube