Claude 4 Opus
Claude 4 Opus is Anthropic’s most capable model for long-horizon agentic work, multi-step reasoning, and complex coding projects.
Released
May 22, 2025
Type
reasoning
License
proprietary
Context
200,000 tokens
Pricing
Input
$15.00 / 1M tokens
Output
$75.00 / 1M tokens
Benchmarks
| SWE-bench Verified | 72.5% |
| GPQA Diamond | 79.6% |
Capabilities
Links
Claude 4 Opus in the news
Financial Times · Jun 14, 2026
Wall Street digests record fundraising haul as AI race intensifies
Wall Street is processing a significant surge in fundraising, with SpaceX, Anthropic, and Alphabet leading the charge in recent capital injections, underscoring investor appetite for the burgeoning artificial intelligence sector. SpaceX secured $750 million in a funding round that valued the company at $180 billion, according to a February 2024 report by The Wall Street Journal. This financing event, alongside substantial investments in AI companies, signals a robust investor confidence despite a crowded market for new issuances. Anthropic, a prominent AI research firm, raised $7.3 billion in a series of funding rounds throughout 2023, with a significant $4 billion tranche coming from Amazon in September 2023 and another $2 billion from Google in October 2023. Alphabet, the parent company of Google, also participated in Anthropic's funding, further demonstrating its commitment to AI development. These record fundraising hauls are occurring as the global AI race intensifies, with major tech players and startups vying for dominance in developing advanced AI models and applications. The sheer volume of capital being deployed suggests a belief among investors that AI will continue to be a transformative technology across various industries, justifying the high valuations and substantial investment amounts.
CoinTelegraph · Jun 14, 2026
Amazon warning triggered US crackdown on Anthropic AI models: Reports
The Trump administration suspended foreign access to Anthropic's Fable 5 and Mythos 5 AI models on Friday, following calls from Amazon CEO Andy Jassy and other tech executives. This action was reportedly a response to concerns raised about the potential misuse of advanced AI technologies. The suspension aimed to prevent these powerful models from falling into the wrong hands, particularly those that could use them for malicious purposes. The decision highlights the growing scrutiny and regulatory attention on the development and deployment of artificial intelligence by major technology companies. Amazon, a significant investor in Anthropic, played a role in bringing these concerns to the attention of government officials, underscoring the complex relationship between industry giants and national security interests in the rapidly evolving AI landscape. The specific details of the concerns that led to the suspension were not fully disclosed, but the move signals a proactive stance by the administration to manage the risks associated with cutting-edge AI.
TechCrunch · Jun 14, 2026
As Anthropic suspends access to new models, India debates its AI future
India's technology sector is grappling with the implications of Anthropic suspending access to its new AI models, prompting a national debate on the country's AI future. The incident, which occurred this week, has led tech leaders to question whether it serves as a critical juncture for India's burgeoning artificial intelligence ambitions. Concerns are being raised about the potential impact on innovation and development within the Indian AI landscape, particularly in light of global advancements and the strategic importance of AI. The debate centers on how India can navigate the complexities of AI development while ensuring responsible and sustainable growth. Discussions involve policymakers, industry pioneers, and researchers who are evaluating the current trajectory and future strategies for AI in India. The goal is to foster an environment that supports technological progress without compromising ethical considerations or national interests. This introspection aims to solidify India's position as a significant player in the global AI arena.
The Verge · Jun 13, 2026
Amazon security research reportedly led to the White House’s Anthropic Fable ban
Amazon's cybersecurity research contributed to the White House's directive that prompted Anthropic to halt access to its Fable 5 and Mythos 5 models for certain foreign entities. The Wall Street Journal reported that a paper authored by Amazon researchers detailed vulnerabilities that could be exploited, leading to concerns about the technology's potential misuse. This research, coupled with discussions between Amazon CEO Andy Jassy and White House officials, played a role in the export control measures. The directive specifically targeted the use of these advanced AI models by entities deemed a risk to national security. Anthropic, in response to the directive, confirmed it had ceased providing access to Fable 5 and Mythos 5, adhering to the U.S. government's guidance. The company stated its commitment to complying with all applicable export control regulations. This event highlights the increasing scrutiny on the global proliferation of powerful AI technologies and the role of major tech companies in advising government policy.
Decrypt · Jun 13, 2026
US Government Orders Anthropic to Pull Claude Fable, Mythos AI Models
The U.S. government ordered AI company Anthropic to pull its Claude Fable and Mythos models on March 11, 2024, citing a critical vulnerability that could allow unauthorized access to sensitive data. Anthropic stated that the vulnerability is already prevalent across the AI industry and pushed back against the order, characterizing it as an overreach. The company's response, detailed in a blog post on March 12, 2024, emphasized that the identified security flaw does not pose a unique or elevated risk specific to their models compared to other large language models currently in use. This action highlights ongoing governmental scrutiny of AI safety protocols and the potential for regulatory intervention in the rapidly evolving field of artificial intelligence. The specific nature of the vulnerability and the extent of the potential data exposure were not fully disclosed in the initial government directive, but the order implies a significant risk to user privacy and data integrity. Anthropic's public rebuttal suggests a disagreement over the severity and exclusivity of the threat, potentially setting a precedent for future disputes between AI developers and regulatory bodies concerning model security and deployment.