How to pronounce RadixAttention

RadixAttention is most commonly pronounced "ray diks uh ten shun" (/ˈreɪdɪks əˌtɛnʃən/). This is the widely-used reading among engineers, though edge cases exist.

SGLang's automatic KV-cache reuse mechanism — a radix tree over the KV cache for prefix sharing; coined by LMSYS (2024). Compound of "radix" + "attention". STRESS: RAY-diks-uh-TEN-shun (primary on RAY, secondary on TEN). "radix" is /ˈreɪdɪks/ (RAY-diks, the standard dictionary form per Wiktionary/Cambridge), NOT "ra-dicks" or "ra-tix"; final cluster is "-ks" not "-tx". Often mispronounced by non-native devs as "ratix"/"radicks". Alt /ˈrædɪks/ (RAD-iks) is a secondary variant.

Alternate readings you might hear:

• "rad iks uh ten shun" /ˈrædɪks əˌtɛnʃən/

Source: LMSYS Org Blog — "Fast and Expressive LLM Inference with RadixAttention and SGLang"

Pronouncing project and product names correctly avoids the small but persistent friction of being gently corrected during standups, conference Q&As, and team calls. Hearing the word a few times locks in the right reading better than reading IPA ever will. Pronounce is a community-maintained dictionary — every entry tagged with a confidence level and (where possible) a citable source.