Who can use Claude Mythos 5 after the Commerce Department restored access?

Claude Mythos 5 is available to 100+ trusted partners named in 'Annex A' of Commerce Secretary Howard Lutnick's June 26 letter to Anthropic. The list covers Fortune 500 companies and US government agencies. Both US staff and foreign-national employees at those entities can use Mythos 5 without a separate export license. Everyone else still cannot.

Why was Claude Mythos 5 blocked in the first place?

The Commerce Department imposed export controls on Claude Mythos 5 and Claude Fable 5 on June 12, 2026, after Amazon and other companies warned the models could be jailbroken for malicious use and reportedly accessed by entities linked to China. Anthropic disabled both models worldwide that night and later sued the administration.

Is Claude Fable 5 also unblocked?

Claude Fable 5, the broadly available version of Mythos with built-in safety classifiers, remains under review. Commerce Secretary Lutnick's June 26 letter restored only Mythos 5 access and only for Annex A partners. Anthropic has not given a Fable 5 restoration timeline.

What did Anthropic agree to in exchange for restored Mythos 5 access?

Anthropic agreed to work with the US government on protocols and standards for future model releases. Commerce Secretary Lutnick said 'appropriate safeguards are in place to permit certain trusted partners to access' Claude Mythos 5, citing 'significant progress' in two weeks of negotiations between the company and federal officials.

Anthropic · 2026-06-26 · major

Claude Mythos 5 restored — US Commerce lifts block for 100+ trusted partners

Claude Mythos 5 is back for 100+ pre-approved US institutions after the US Commerce Department lifted its two-week export block. Anthropic can now ship Mythos 5 to the Annex A trusted-partner list without a license.

Commerce restores Claude Mythos 5 to 100+ Annex A trusted partners after two weeks dark — Fable 5 still under review.

Quick facts

Maker	Anthropic
Model	Claude Mythos 5
Action	Partial export-block lift
Eligible entities	100+ US institutions on Annex A
License requirement	None for Annex A entities
Fable 5 status	Still under review
Announced	June 26, 2026

What is it?

Claude Mythos 5, Anthropic's most capable model, is back online for a fixed list of 100+ trusted US institutions and their foreign-national employees. Commerce Secretary Howard Lutnick wrote to Anthropic on June 26, 2026 saying the export block is lifted for entities named in 'Annex A' of his letter. Two weeks ago the same office had ordered Anthropic to suspend Mythos 5 worldwide.

How does it work?

The arrangement is a narrow exemption from the original export-control directive. Annex A names 100+ US companies and federal agencies that Anthropic can serve without a separate deemed-export license each time. Foreign-national employees at those entities are covered as well. Mythos 5 stays restricted for everyone else, and Anthropic commits to working with the government on protocols and standards for future model releases.

Why does it matter?

Mythos 5 is Anthropic's top-end tier, a notch above Claude Opus 4.8 and aimed at heavy cyberdefense and research work. For 14 days every paying customer was cut off worldwide. With the Annex A exemption, Fortune 500 firms and federal agencies on the list get Mythos 5 access back, and Anthropic returns to revenue on the model. The weaker Fable 5 stays under review with no announced timeline.

Who is it for?

Fortune 500 partners and US federal agencies on Annex A

Frequently asked questions

Who can use Claude Mythos 5 after the Commerce Department restored access?: Claude Mythos 5 is available to 100+ trusted partners named in 'Annex A' of Commerce Secretary Howard Lutnick's June 26 letter to Anthropic. The list covers Fortune 500 companies and US government agencies. Both US staff and foreign-national employees at those entities can use Mythos 5 without a separate export license. Everyone else still cannot.
Why was Claude Mythos 5 blocked in the first place?: The Commerce Department imposed export controls on Claude Mythos 5 and Claude Fable 5 on June 12, 2026, after Amazon and other companies warned the models could be jailbroken for malicious use and reportedly accessed by entities linked to China. Anthropic disabled both models worldwide that night and later sued the administration.
Is Claude Fable 5 also unblocked?: Claude Fable 5, the broadly available version of Mythos with built-in safety classifiers, remains under review. Commerce Secretary Lutnick's June 26 letter restored only Mythos 5 access and only for Annex A partners. Anthropic has not given a Fable 5 restoration timeline.
What did Anthropic agree to in exchange for restored Mythos 5 access?: Anthropic agreed to work with the US government on protocols and standards for future model releases. Commerce Secretary Lutnick said 'appropriate safeguards are in place to permit certain trusted partners to access' Claude Mythos 5, citing 'significant progress' in two weeks of negotiations between the company and federal officials.

Try it

Mythos 5 access via Anthropic for Annex A entities only