v4.8.3

New features

• Support converting UMT5 models from Hugging Face Transformers (#2103) by @the-cross-art

Fixes and improvements

• Support Transformer models where each layer has its own relative attention bias by @the-cross-art
• Fix Windows ROCm Translator hangs and DLL loading (#2106) by @0xDELUXA
• Fix crashes when loading model files from Python file-like objects (#2110) by @Purfview
• Upgrade pybind11 to 2.13.6 for CPython 3.14 allocator safety (#2108) by @cepeter
• Guard exhausted candidates in CUDA TopK stage 2 (#2104) by @mzggr0914
• Fix Windows shutdown deadlocks and memory leaks with the Ruy backend (#2076) by @timo9378
• Add Clang ThreadSanitizer testing (#1986) by @3manifold
• Improve ROCm wheel testing and release checks; upgrade build actions to Node.js 24 (#2112) by @jordimas
• Add local CUDA and ROCm release validation with CI wheels and commit status reporting by @jordimas