SGLang vs vLLM

SGLang is a serving engine for large language models, and the three entries captured here are all .post patch releases rather than feature versions. Their content is narrow and specific: GLM 5.2 failing under prefill/decode disaggregation and context parallelism, DeepSeek V4 emitting garbled text during single-token decode on B200/B300 hardware, NaN outputs from FlashInfer TRT-LLM FP4 MoE kernels on long inputs, and a FlashInfer version bump to fix its JIT cubin downloader.

What these patches describe is the real cost of supporting frontier architectures early: each new model family brings its own interaction with speculative decoding, sliding-window KV allocation, quantised MoE kernels and disaggregated serving, and the failures surface as wrong output rather than crashes. The recurring FlashInfer dependency issues point to a kernel layer moving as fast as the models above it. Because only .post tags are captured, none of the actual feature releases appear, so this feed shows the stabilisation work and none of the shipping.

Expect further .post patches tracking whichever model family lands next; a read on SGLang's feature direction isn't possible until the minor releases themselves appear in this feed.