Observed Signal · May 11, 2026 · Funding · Source: AI Secret · Impact: 3/5 · Sentiment: Neutral
Chip Makers Back RadixArk $100M Seed Round
AI Secret reports that NVIDIA, AMD, and Intel co-invested in a $100 million seed round for RadixArk at a $400 million valuation; RadixArk operates SGLang, an open-source inference engine reportedly deployed across 400,000+ GPUs and used by major cloud and AI firms. The newsletter also highlights OpenAI’s ChatGPT Futures program (26 builders given $10,000 each and frontier model access), and Anthropic’s unreleased Claude Mythos preview, which reportedly discovered thousands of zero‑day vulnerabilities (including 271 Firefox flaws), prompting calls from US financial regulators to bank CEOs. The items signal shifts in AI infrastructure investment, decentralised inference tooling, and accelerated vulnerability discovery by large models.
Major chipmakers co-investing in a neutral inference-layer company signals meaningful shifts in AI infrastructure and compute economics; combined with Anthropic’s model-driven vulnerability discovery and OpenAI’s developer programs, the developments matter to AI infrastructure and platform strategies across industries.
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Key Takeaways & Evidence Grounding
- RadixArk raised a $100 million seed round at a $400 million valuation backed by NVIDIA, AMD, and Intel.
- RadixArk is behind SGLang, an open-source inference engine reportedly deployed across 400,000+ GPUs and used by Google, Microsoft, xAI, Oracle, NVIDIA, and AMD.
- Anthropic’s unreleased Claude Mythos Preview reportedly found thousands of zero-day vulnerabilities, including 271 Firefox flaws, a 27-year-old OpenBSD bug, and a 17-year-old FreeBSD RCE; US Fed and Treasury officials reportedly called bank CEOs following the findings.
- OpenAI launched its first ChatGPT Futures class, awarding 26 young builders $10,000 each and frontier model access; one participant, Matteo Paz, used ~200TB of NEOWISE data to flag 1.9 million infrared variable objects, including about 1.5 million previously unknown candidates.
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AI infra decacorns: Fireworks, Baseten, OpenRouter $113M
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