Opus 4.8, Fable 5, and the arrival of Andrej Karpathy
Over the past 30 days, Anthropic has demonstrated radical technological progress that directly lays the groundwork for its public debut. On May 28, 2026, the company officially released Claude Opus 4.8, the most powerful publicly available version of the model, featuring significant improvements in benchmarks and the ability to proactively flag uncertainties in analyses. Opus 4.8 is available at the same price as the previous version: $5 per million input tokens and $25 per million output tokens. Just 11 days after the release of Opus 4.8, on June 9, 2026, Anthropic released Claude Fable 5, the first publicly available version of the Mythos model, which was previously considered too dangerous for public use. Fable 5 is a modified version of Mythos with restrictions that block responses in high-risk areas such as cybersecurity, biology, chemistry, and model distillation, with Opus 4.8 taking over in these cases. May 2026 was also significant for human capital, as on May 19, Andrej Karpathy, co-founder of OpenAI and former head of AI development at Tesla for Full Self-Driving, joined the Anthropic team as a member of the pre-training team. Karpathy will lead a new group focused on using Claude to automate pre-training research, a key area as AI companies seek to automate various aspects of AI development. This move carries symbolic significance, as one of the world’s most renowned AI researchers is leaving OpenAI to join a direct competitor, signaling an escalation in the battle between Claude and ChatGPT.
Financial Fundamentals and Record Revenue Growth
Anthropic’s financial fundamentals are the direct reason why an IPO is now a reality. In a February 2026 funding round, the company raised $30 billion, bringing its valuation to $380 billion, more than double the $183 billion valuation it held in September 2025. Just a few days before filing for its IPO, in a new funding round in May 2026, Anthropic raised $65 billion, pushing its valuation to $965 billion. Anthropic’s revenue is growing explosively, and the company plans to more than double its annual revenue to $26 billion in 2026, an annual growth rate that is a direct prerequisite for an IPO. In 2026, total revenue reached $14 billion, with Claude Code alone generating $2.5 billion or more. The company has over 300,000 commercial and enterprise customers, which is a massive base for the public market. Anthropic’s investor base is elite, as its backers include Alphabet and Amazon, while Microsoft and Nvidia announced plans to invest up to $15 billion in November 2025. This combination of investors, big tech firms plus AI hardware giants, is a direct guarantee of stability for the IPO. [1]
The First Major AI IPO
Anthropic’s IPO would rank among the biggest tech events in history, as the company could raise more than $60 billion. For the artificial intelligence sector, this would be a watershed moment that could trigger a significant expansion of investment in this industry on public markets. The first major IPO of an AI company could directly impact the tech sector, the NASDAQ index, and tech stocks, which is also important for stock market trading. The geopolitical dimension is also important, as Anthropic is seeking to smooth relations with the White House ahead of its planned IPO while strengthening the protection of critical infrastructure such as banks, hospitals, and emergency services. Stronger ties to Washington may, in the short term, alleviate concerns that tensions with the government will harm the company’s business prospects. Another important signal was that on April 6, 2026, OpenAI, Anthropic, and Google joined forces to prevent the unauthorized copying of their most advanced artificial intelligence models, particularly by Chinese competitors, through the non-profit organization Frontier Model Forum. This, too, shows that the artificial intelligence sector has become part of U.S. national security priorities. [2]
IPO Timing and Competition with OpenAI
The timing of the IPO is crucial for business decisions. Bloomberg reported this week that Anthropic is considering going public as early as October 2026, with Goldman Sachs, JPMorgan Chase, and Morgan Stanley in early discussions as potential underwriters. Most analysts expect a public debut in the second half of 2026, likely in the fourth quarter. At the same time, Anthropic has beaten OpenAI to the punch in the race to go public, setting up a direct battle between Claude and ChatGPT in the public markets. Wall Street analysts expect OpenAI to announce its own IPO at any time in 2026. Although Anthropic officially states that no final decision has been made regarding an IPO, CFO Sarah Friar noted that an IPO is not in the immediate plans, as the company has not yet reached a final decision. What is clear, however, is that Anthropic is preparing for the possibility of becoming a publicly traded company and is conducting preliminary discussions with investment banks. [3]
[1,2,3] Forward-looking statements are based on assumptions and current expectations, which may be inaccurate, or on the current economic environment, which may change. Such statements do not guarantee future results. They involve risks and other uncertainties that are difficult to predict. Actual results may differ materially from those expressed or implied in any forward-looking statements.
Sources:
https://finance.yahoo.com/news/anthropic-plans-ipo-early-2026-004854547.html
https://www.anthropic.com/news/claude-opus-4-8
https://www.cbsnews.com/news/anthropic-ipo-confidential-filing-claude-ai/
https://www.axios.com/2026/04/24/google-amazon-anthropic-investment
