# New Release: Ultralytics v8.4.164 **URL:** \ **Category:** Discussion\ **Tags:** releases, announcements, ultralytics-official\ **Created:** [September 28, 2026, 1:12pm UTC](https://community.ultralytics.com/t/new-release-ultralytics-v8-4-164/2244 "2026-09-28T13:12:34Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![glenn-jocher](https://sea1.discourse-cdn.com/flex001/user_avatar/community.ultralytics.com/glenn-jocher/32/83_2.png) [@glenn-jocher](https://community.ultralytics.com/u/glenn-jocher)\ **Post date:** [September 28, 2026, 1:12pm UTC](https://community.ultralytics.com/t/new-release-ultralytics-v8-4-164/2244/1 "2026-09-28T13:12:34Z")
# 🚀 Ultralytics v8.4.164 is here **Quick overview:** Ultralytics YOLO v8.4.164 makes FLOPs reporting more efficient, speeds up parts of export and CUDA video prediction, catches dataset issues earlier, and fixes several reliability bugs. **No model architectures are changed in this release.** ## ⚡ Performance and workflow improvements - **Lighter FLOPs reporting:** THOP 2.2.0 profiles at smaller strides, reducing the overhead of model information checks and training startup logging for affected models, including YOLO11 and YOLO26. [PR #26373](https://github.com/ultralytics/ultralytics/pull/26373) by [@glenn-jocher](https://github.com/glenn-jocher). - **Faster exports:** CoreML skips redundant trace checking, with reported trace times around 2.8–3× faster. [PR #26337](https://github.com/ultralytics/ultralytics/pull/26337) by [@amanharshx](https://github.com/amanharshx). The exporter also removes a duplicate dry-run forward pass in [PR #26334](https://github.com/ultralytics/ultralytics/pull/26334) by [@amanharshx](https://github.com/amanharshx). - **Smoother CUDA video prediction:** Frame prefetching can overlap loading with GPU processing, while batches stay within a single video to avoid mixed-FPS issues. [PR #26349](https://github.com/ultralytics/ultralytics/pull/26349) by [@JESUSROYETH](https://github.com/JESUSROYETH). - **Faster SAM processing:** `batched_mask_to_box` is reported to be 86% faster on CPU. [PR #26364](https://github.com/ultralytics/ultralytics/pull/26364) by [@Y-T-G](https://github.com/Y-T-G). ## 🗂 Dataset and input handling - OBB dataset scans now reject box-only labels earlier. [PR #26330](https://github.com/ultralytics/ultralytics/pull/26330) by [@Nicholas022400701](https://github.com/Nicholas022400701). - Detection training can use pose datasets by dropping keypoints during label verification. [PR #26357](https://github.com/ultralytics/ultralytics/pull/26357) by [@Nicholas022400701](https://github.com/Nicholas022400701). - Dataset scans reject fractional class IDs. [PR #26367](https://github.com/ultralytics/ultralytics/pull/26367) by [@Nikhi00718](https://github.com/Nikhi00718). - Valid `.jp2` images are no longer incorrectly marked corrupt during scans. [PR #26355](https://github.com/ultralytics/ultralytics/pull/26355) by [@cainiao33](https://github.com/cainiao33). - Multi-row CSV prediction sources now parse correctly. [PR #26360](https://github.com/ultralytics/ultralytics/pull/26360) by [@Nikhi00718](https://github.com/Nikhi00718). - Tar-family dataset download URLs now go through `safe_download`. [PR #26361](https://github.com/ultralytics/ultralytics/pull/26361) by [@cainiao33](https://github.com/cainiao33). - Segments fully outside an image return early from `segment2box`. [PR #26331](https://github.com/ultralytics/ultralytics/pull/26331) by [@raimbekovm](https://github.com/raimbekovm). ## 🛠 Reliability and bug fixes - Fixed memory growth in `Annotator(pil=True)`. [PR #26346](https://github.com/ultralytics/ultralytics/pull/26346) by [@Y-T-G](https://github.com/Y-T-G). - Prediction writers and sources are released when streams end early. [PR #26348](https://github.com/ultralytics/ultralytics/pull/26348) by [@cainiao33](https://github.com/cainiao33). - Tracker callbacks no longer run during plain prediction. [PR #26352](https://github.com/ultralytics/ultralytics/pull/26352) by [@aswanth-07](https://github.com/aswanth-07). - YOLOv9 distillation now handles different teacher and student head layouts. [PR #26338](https://github.com/ultralytics/ultralytics/pull/26338) by [@Nikhi00718](https://github.com/Nikhi00718). Distillation checkpoints also re-derive teacher feature indices when unpickled in [PR #26362](https://github.com/ultralytics/ultralytics/pull/26362) by [@cainiao33](https://github.com/cainiao33). - Export options apply to mixed-case and alias format names. [PR #26358](https://github.com/ultralytics/ultralytics/pull/26358) by [@MohammadHijjawi97](https://github.com/MohammadHijjawi97). - Stale TensorRT INT8 calibration caches are no longer reused. [PR #26368](https://github.com/ultralytics/ultralytics/pull/26368) by [@amanharshx](https://github.com/amanharshx). - `ObjectCropper` no longer crashes with OBB models. [PR #26359](https://github.com/ultralytics/ultralytics/pull/26359) by [@MohammadHijjawi97](https://github.com/MohammadHijjawi97). - Model parsing restores `Conv.default_act` after an override. [PR #26347](https://github.com/ultralytics/ultralytics/pull/26347) by [@cainiao33](https://github.com/cainiao33). - Resume keeps the checkpoint dataset, and export validation hints omit host paths. [PR #26335](https://github.com/ultralytics/ultralytics/pull/26335) by [@raimbekovm](https://github.com/raimbekovm). - Bracketed CLI values are joined after `=` merging. [PR #26365](https://github.com/ultralytics/ultralytics/pull/26365) by [@MohammadHijjawi97](https://github.com/MohammadHijjawi97). - An unused `labels` autolabel path was removed from `non_max_suppression`. [PR #26356](https://github.com/ultralytics/ultralytics/pull/26356) by [@cainiao33](https://github.com/cainiao33). ## 📚 Documentation and release infrastructure - Platform documentation now covers 21 export formats. [PR #26344](https://github.com/ultralytics/ultralytics/pull/26344) by [@glenn-jocher](https://github.com/glenn-jocher). - Rust inference documentation updates `ultralytics-inference` to 0.0.48 and adds quantization guidance. [PR #26345](https://github.com/ultralytics/ultralytics/pull/26345) by [@onuralpszr](https://github.com/onuralpszr). - Core AI export guidance now covers Linux and Platform, alongside duplicate-resource-name `409` responses. [PR #26343](https://github.com/ultralytics/ultralytics/pull/26343) by [@raimbekovm](https://github.com/raimbekovm). - A package audit updated docstrings and export documentation and arguments, and fixed identified bugs. [PR #26370](https://github.com/ultralytics/ultralytics/pull/26370) by [@glenn-jocher](https://github.com/glenn-jocher). - Publishing better handles PyPI outages and avoids repeated Slack alerts. [PR #26340](https://github.com/ultralytics/ultralytics/pull/26340) by [@glenn-jocher](https://github.com/glenn-jocher). - Jetson CI settings are isolated per runner in [PR #26366](https://github.com/ultralytics/ultralytics/pull/26366) by [@glenn-jocher](https://github.com/glenn-jocher), while superseded hardware runs are canceled to reduce CI time in [PR #26369](https://github.com/ultralytics/ultralytics/pull/26369) by [@glenn-jocher](https://github.com/glenn-jocher). - The CI status table now includes lite, OpenAPI, and skills in [PR #26372](https://github.com/ultralytics/ultralytics/pull/26372) by [@glenn-jocher](https://github.com/glenn-jocher), and `test_train` auto-selects idle GPUs at DDP launch in [PR #26374](https://github.com/ultralytics/ultralytics/pull/26374) by [@glenn-jocher](https://github.com/glenn-jocher). **Give v8.4.164 a try!** Explore the [release](https://github.com/ultralytics/ultralytics/releases/tag/v8.4.164) or [full changelog](https://github.com/ultralytics/ultralytics/compare/v8.4.163...v8.4.164), and let us know how the improvements work in your workflows. 🙌