---
title: "Sources: Anthropic declined to submit Mythos 5.1 to the UK AISI for pre-release testing, prompting UK fears that US AI labs are aligning with US protectionism (Financial Times)"
type: signal
url: https://frontiernewswire.com/s/sources-anthropic-declined-to-submit-mythos-5-1-to-the-uk-aisi-for-pre-6dea4387
published: 2026-09-09T06:20:01.000Z
byline: "Source: TECHMEME"
---

# Sources: Anthropic declined to submit Mythos 5.1 to the UK AISI for pre-release testing, prompting UK fears that US AI labs are aligning with US protectionism (Financial Times)

Source: TECHMEME · Published 2026-09-09 · Canonical: https://frontiernewswire.com/s/sources-anthropic-declined-to-submit-mythos-5-1-to-the-uk-aisi-for-pre-6dea4387

Financial Times : Sources: Anthropic declined to submit Mythos 5.1 to the UK AISI for pre-release testing, prompting UK fears that US AI labs are aligning with US protectionism — Decision to exclude Aisi has prompted fears inside British government of protectionist shift among tech groups.

In this story: [UK AI Security Institute](https://frontiernewswire.com/companies/uk-ai-security-institute), [Mythos 5.1](https://frontiernewswire.com/models/mythos-5-1)

## Sources

- [Read the original at TECHMEME](https://www.techmeme.com/260909/p4#a260909p4)

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