In response to government cybersecurity concerns, Anthropic has equipped its newly released model with enhanced cyber safeguards, surpassing those of its previous Opus iteration.
Anthropic officially launched its latest artificial intelligence model, Claude Opus 5, on Thursday. This release follows a period of intense dialogue with the US government regarding AI safety and comes just days after a significant security incident involving OpenAI captivated the tech industry.
According to a company statement, Opus 5 demonstrates capabilities that "come close to the capabilities of Claude Fable 5 in many domains" and offers substantial improvements in handling complex coding tasks. Claude Fable 5, a public-facing Mythos-class model, previously drew government scrutiny, leading to its temporary removal from service alongside Mythos 5, before being reinstated with even more robust cybersecurity measures.
The issues surrounding Fable 5, coupled with subsequent weeks of negotiations between Anthropic and the government, heralded a new era of AI regulation under the Trump administration. This regulatory shift was further underscored when OpenAI's GPT-5.6 underwent a roughly two-week trial period, initially rolling out in a limited preview exclusively to government-approved entities.
Anthropic is emphasizing strengthened cybersecurity safeguards with the introduction of Opus 5.
When questioned about whether Opus 5 had been reviewed by the Trump administration prior to its public unveiling, Anthropic spokesperson Danielle Ghiglieri informed The Verge, "We continue to work with our government partners to conduct their own independent testing of our models. This includes Opus 5."
Anthropic is strategically positioning Opus 5 for its enterprise clientele, touting its suitability for knowledge work and biological applications, and designating it as the ideal everyday model. Fable 5, conversely, remains recommended for the most ambitious projects and long-horizon AI agent development. The company explicitly stated in its release that Opus 5 boasts stronger cybersecurity safeguards than its predecessor, Opus 4.8, and is "the most aligned Opus model and is the least susceptible to being tricked into misuse."
With this new model's launch, Anthropic appears to subtly address recent controversies, including allegations of hidden usage caps that have spurred at least one lawsuit, and the broader "AI money squeeze" debate concerning how AI labs' operational costs are being passed to customers. Notably, Opus 5 maintains the same pricing as its predecessor at $5 input and $25 output per million tokens, with Anthropic highlighting it as "half the price" of Fable 5 and "slightly cheaper" than OpenAI’s GPT-5.6.
Customers now have the option to select "Fast mode" for Opus 5, a feature debuting today in research preview, which offers enhanced speeds at double the standard price. Additionally, users can opt-in for automatic fallbacks to a lower-tier model should Opus 5 decline a request due to its inherent safeguards.
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