Anthropic выпустила Claude Opus 5 — почти уровень Fable 5 и сильнее в программировании

Anthropic released Claude Opus 5 on July 23, 2026 — a new flagship model that, according to the company, is "close to the capabilities of Claude Fable 5 in many areas" and notably stronger at complex programming tasks.

What Claude Opus 5 can do

Claude Opus 5 is Anthropic's newest model, unveiled on July 23, 2026; the company's main focus was complex programming, where the new version performs noticeably better than its predecessors. At the same time, Anthropic compares Opus 5 not with the previous Opus, but with its more powerful model, Fable 5.

"Opus 5 is close to the capabilities of Claude Fable 5 in many areas,"

Anthropic's release states.

• Release date — July 23, 2026
• According to Anthropic, Opus 5 is "close to the capabilities of Fable 5 in many areas"
• Key improvement — complex coding tasks
• Fable 5 is the public model of the Mythos class
• Fable 5 and Mythos 5 were taken offline for several weeks, then returned with strengthened cyberdefenses

Why Fable 5 was taken offline

Fable 5, together with Mythos 5, was removed from public access for several weeks over concerns raised by the US government, and was later reinstated with stricter cyberdefenses than before — as The Verge notes. Fable 5 is the public face of the Mythos class of models, and it was the one that drew the government's displeasure.

The return of Fable 5 was accompanied by strengthened defenses: Anthropic restored access to the model only after adding cybersecurity mechanisms more powerful than the original ones. Against this backdrop, the launch of Opus 5, which the company directly compares to Fable 5, looks like an attempt to give users a model of comparable power without some of the risks of the Mythos-class flagship.

The backdrop of the release

The release of Claude Opus 5 came at a tense moment for the industry. A week before the announcement, Anthropic was in the midst of another direct standoff with the US government, and a few days before July 23, 2026, the industry was rattled by a security incident at OpenAI that dominated discussions across the tech sector.

Anthropic rolled out Opus 5 during this very period — right after the negotiations around Fable 5 and amid industry-wide anxiety over AI security. The company is betting that a powerful but better-protected model is the right answer both for regulators and for developers who need Fable-5-level power.

What this means

Anthropic is expanding its Claude lineup under regulatory pressure: Opus 5 delivers capabilities close to the flagship Fable 5, but is positioned as a more controllable and safer option. For developers, it's another powerful tool for complex coding; for the market, it's a signal that model cybersecurity now directly affects what labs release and when.

Frequently asked questions

How does Claude Opus 5 differ from Fable 5?

According to Anthropic, Opus 5 is "close to the capabilities of Fable 5 in many areas," but its key advantage is complex programming tasks. Fable 5, meanwhile, remains the more powerful public model of the Mythos class.

Why was Fable 5 taken offline?

Fable 5, together with Mythos 5, was removed from public access for several weeks over concerns raised by the US government. The model was later brought back online with cyberdefenses stronger than the original ones.