ultralytics 8.4.57

v8.4.57 - `ultralytics 8.4.57` Python 3.13 CI (#24640)

on Python PyPI

🌟 Summary

🚀 Ultralytics v8.4.57 is mainly a Python 3.13 readiness release, making CI and export workflows more robust across platforms, while also adding a meaningful RT-DETR CoreML export upgrade and a semantic segmentation mask alignment fix.

📊 Key Changes

• 🐍 Python 3.13 CI is now the main focus of this release

  • CI testing moved to Python 3.13 across Linux, Windows, macOS, ARM, GPU, and benchmark jobs.
  • Added official Python 3.13 package support metadata.
  • Updated dependency rules for export-related packages like TensorFlow, ONNX, CoreML, NumPy, and protobuf.

• 🛡️ Export and slow-test CI became much more resilient

  • Added a dedicated slow-test runner script with better diagnostics.
  • CI now captures clearer logs for crashes, memory/resource issues, and dependency conflicts instead of failing silently.
  • Extra isolation was added for export tests to reduce flaky failures caused by parallel runs.

• 🚫 Python 3.13 compatibility guards were added for unsupported export stacks

  • TensorFlow export is blocked on macOS + Python 3.13 due to upstream wheel issues.
  • TensorFlow.js export is blocked on Python 3.13 because its current dependency stack is not yet compatible.
  • Axelera export is skipped on Python 3.13 for now.
  • DEEPX CI validation stays on Python 3.12 because its compiler wheels are not yet available for 3.13.

• 📦 RT-DETR CoreML export improved significantly

  • RT-DETR-L can now export to CoreML mlprogram more reliably.
  • Core parts of the decoder were adjusted to preserve precision, especially where FP16 could cause output drift.
  • New tests were added to validate RT-DETR CoreML export.

• 🎯 Semantic segmentation masks are now better aligned

  • Fixed a subtle issue where masks could appear slightly offset because of sub-pixel LetterBox padding.
  • Predictions are now resized more carefully before padding removal, leading to cleaner masks on the original image.

• 📚 Docs and platform updates

  • Added new Ultralytics Platform integrations docs for importing from Ultralytics HUB and Roboflow.
  • Large refresh of DEEPX documentation and branding consistency.
  • Fixed doc inaccuracies and broken links across Comet, TensorRT, Edge TPU, TF.js, ExecuTorch, OBB docs, and more.
  • Explorer legacy snippets were corrected to use YOLO11 models that actually match the pinned older package version.

🎯 Purpose & Impact

• ✅ Better future-proofing for users on new Python versions

  • If you’re moving to Python 3.13, this release makes Ultralytics much more prepared for that transition.
  • Users should see more predictable installation, testing, and export behavior.

• 🔍 Much easier debugging for maintainers and advanced users

  • CI failures should now be more informative instead of abruptly dying with little explanation.
  • This helps speed up fixes and makes release quality stronger over time.

• 📤 Safer export experience across many backends

  • Instead of letting unsupported combinations fail mysteriously, Ultralytics now blocks or skips them with clearer reasoning.
  • That means less wasted time for users trying unsupported exports.

• 🍎 RT-DETR deployment on Apple ecosystems gets more practical

  • CoreML export improvements make RT-DETR more usable for iPhone, iPad, and Apple device workflows.
  • This is one of the biggest model-related improvements in the release.

• 🖼️ Semantic segmentation results should look cleaner

  • Users working with segmentation may notice more accurate mask placement, especially around edges and padding-sensitive cases.

• 🌐 Easier migration into the Ultralytics Platform

  • New docs for importing from Ultralytics HUB and Roboflow make it simpler to bring existing datasets and assets into the Ultralytics Platform 📥

Overall, v8.4.57 is less about introducing a brand-new model and more about stability, compatibility, and deployment polish 🛠️✨—especially for Python 3.13, export workflows, and RT-DETR/CoreML users.

What's Changed

• Enable RT-DETR CoreML export and protect decoder ops from FP16 drift by @artest08 in #24510
• docs: Fixing text for DEEPX brand rules & guidlines by @deepx-dgkim in #24535
• Fix semantic segmentation mask offset from sub-pixel LetterBox padding by @lmycross in #24619
• Fix race condition in test_export by @Laughing-q in #24609
• Fix 404 links in Comet and TensorRT docs by @glenn-jocher in #24634
• Add DEEPX vs PyTorch benchmarks pic by @lakshanthad in #24636
• Correct OBB angle range note in docs by @raimbekovm in #24534
• Improve readability of distance calculation documentation by @Sunny11092003 in #24625
• Fix classify CustomizedValidator example augmenting the val set by @raimbekovm in #24532
• Use yolo11n in explorer legacy snippets to match 8.3.11 pin by @raimbekovm in #24548
• Change CI OS from cpu-latest to ubuntu-latest by @glenn-jocher in #24641
• Docs: Platform Integrations by @sergiuwaxmann in #24642
• ultralytics 8.4.57 Python 3.13 CI by @glenn-jocher in #24640

New Contributors

• @Sunny11092003 made their first contribution in #24625
• @deepx-dgkim made their first contribution in #24535

Full Changelog: v8.4.56...v8.4.57