• Accel Partners announced an investment in RadixArk, an AI infrastructure startup focused on open source systems for AI model training and inference.
• RadixArk is built around SGLang, an open source inference engine, with plans to expand tooling across post-training and large-scale deployment.
• Funding described as backing to support development of SGLang and Miles open source projects, with longer-term plans for commercial products spanning model development lifecycle.

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