Record-breaking round and who's behind it

The funding was led by four prominent Silicon Valley investors: Altimeter Capital, Dragoneer, Greenoaks, and Sequoia Capital. The round also included Capital Group, Coatue, GIC (Singapore's sovereign wealth fund), D1 Capital Partners, ICONIQ, and Fidelity. It also includes $15 billion from previously committed investments by cloud giants — of which $5 billion from Amazon, which remains Anthropic's primary cloud and training partner.

A new development is the entry of semiconductor manufacturers Micron, Samsung, and SK Hynix — companies whose memory and storage chips are critical for running models. These are strategic infrastructure partners that will help Anthropic scale its computing capacity to meet growing demand. And demand is enormous: the company announced that its annual run-rate revenue in May exceeded $47 billion.

Claude is available on all three major clouds for the first time

An important milestone is that Claude has become the first frontier model simultaneously available on Amazon Web Services, Google Cloud, and Microsoft Azure. This alone shows how deeply Anthropic has already penetrated the enterprise ecosystem. AWS remains the primary cloud partner, but the company recently also signed a deal with Google and Broadcom for 5 gigawatts of next-generation TPU capacity and with SpaceX for access to GPUs in the Colossus 1 and 2 supercomputers.

For European and Czech companies, this means Claude is no longer tied to a single cloud platform. If your company runs on Azure, Google Cloud, or AWS, you have direct access to the model via the API.

Claude Opus 4.8: A smaller leap, but an important shift in honesty

Alongside the funding announcement, Anthropic released Claude Opus 4.8 — a new version of its most powerful model. The price remains the same as its predecessor: $5 per million input tokens and $25 per million output tokens. The fast mode is now three times cheaper than before.

The improvements aren't as dramatic as with previous generations, but note one thing: according to internal tests, Opus 4.8 is four times less prone to "overlooking" errors in its own code. Early testers from companies like Cursor, Devin (Cognition), Databricks, Hebbia, and Thomson Reuters confirm that the model better recognizes uncertainty and less frequently makes false claims with exaggerated confidence.

In agent benchmarks, Opus 4.8 even beats GPT-5.5 — on the Online-Mind2Web test for browser control it achieved 84%, on the Super-Agent benchmark it was the only one to complete all cases, and on Terminal-Bench 2.1 for programming tasks it scored 78.9%. For the very first time, the model broke the 10% threshold on the rigorous Legal Agent Benchmark for legal practice.

Opus 4.8 handles Czech very well — just like its predecessors. Claude is among the models with the strongest support for Slavic languages, and Czech traditionally achieves high quality with it, whether for translations, text summaries, or content creation.

Mythos heading to all customers

Anthropic also confirmed that Mythos — its most powerful model to date with advanced cybersecurity capabilities — will be available to all customers within weeks, not just selected partners under Project Glasswing. It is precisely Mythos that has raised the greatest concerns among experts and politicians in recent months, because it can find vulnerabilities in software at a pace that human teams cannot replicate.

The announcement comes at a time when Anthropic is also engaged in a legal dispute with the Pentagon. The U.S. Department of Defense labeled the company as a supply chain risk — according to Anthropic, an unconstitutional retaliation for refusing to grant the military unrestricted access to its models.

SpaceX, IPO, and the trillion-dollar club

Anthropic isn't the only AI giant heading for the stock market. SpaceX, which absorbed Elon Musk's xAI in February, could reportedly begin trading as early as June 12, 2026, with a target valuation of approximately $1.75 trillion, according to Reuters. OpenAI and Anthropic both plan their own IPOs later this year. Together, all three companies could create a combined market value exceeding $4 trillion — more than Germany's GDP.

For investors, this is an opportunity, but also a risk: valuations are growing at a pace unprecedented in tech history. OpenAI reached its current value in ten years, Anthropic in five. Yet both companies are still investing massively in infrastructure, and profitability remains nowhere in sight.

What this means for Czech companies and users

Growing competition between Anthropic, OpenAI, and Google means one thing: models are getting faster, cheaper, and more accessible. Claude is now available through the web interface at claude.ai, via the API on all major clouds, and thanks to Claude Code also as a developer tool. Czech companies that use Claude — such as Ecomail, which integrated it into its email marketing tool — thus benefit from every generational improvement without needing to change anything.

In the context of the EU AI Act, it's important that Anthropic has placed safety at the forefront from the start. The company has a detailed Responsible Scaling Policy, model cards (system cards) with safety test results, and for Mythos, it is even delaying public release until additional cybersecurity safeguards are completed. This is exactly the kind of approach that European regulation requires.