Download Latest Version v8.4.117 - Route spatial Albumentations by type and carry masks, polygons and keypoints through it (#25633) source code.zip (3.4 MB)
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v8.4.116 - Raise minimum _opencv-python_ to 4.7.0 (#25702) source code.tar.gz 2026-08-07 2.6 MB
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🌟 Summary

🚀 v8.4.116 improves installation reliability, expands YOLOE and Platform workflows, strengthens tracking and export support, and refreshes YOLO26 documentation.

📊 Key Changes

  • 🔧 OpenCV compatibility fix — current PR [#25702] by @Y-T-G
  • Raises the minimum opencv-python version from 4.6.0 to 4.7.0.
  • Keeps the exclusion for 4.13.0.90, which is affected by a FIPS self-test crash.
  • Removes an outdated ONNX DNN backend requirement check.

  • This aligns the dependency with cv2.imdecodemulti, which Ultralytics uses internally.

  • 🧠 Reusable YOLOE prompt embeddings

  • Adds save_prompt_embeddings() and load_prompt_embeddings() for storing text or visual prompt configurations in NPZ files.
  • Profiles are validated against the source YOLOE model and can be reused before exporting to formats such as ONNX, OpenVINO, TensorRT, CoreML, LiteRT, and RKNN.

  • Exported models remain standard single-input models and do not require the NPZ file at runtime.

  • 📚 Improved model guidance

  • Reworks the model index into a task-and-mode comparison table.
  • Positions YOLO26 as the recommended model for new projects, with YOLO11 as a mature production alternative.
  • Clarifies support for YOLO12, OBB, SAM models, YOLOE, YOLO-World, RT-DETR, and other model families.

  • Adds a YOLO26 custom-dataset training video and highlights monocular depth estimation.

  • 🎯 Broader and safer tracking support

  • Documents and supports OBB tracking alongside detection, segmentation, and pose.
  • Rejects unsupported semantic and depth tracking tasks with a clear error before processing begins.
  • Skips unnecessary camera-motion compensation work when gmc_method: none.

  • Keeps OC-SORT observation history bounded on all track lifecycle paths.

  • 📦 More efficient model export

  • Streams ONNX and QNN calibration data instead of retaining all transformed images in memory.
  • Reduces calibration memory usage substantially for large datasets.

  • Updates anchor creation to use CoreML-friendly tensor operations, improving dynamic CoreML export compatibility.

  • 🧪 Depth and segmentation fixes

  • Excludes ground-truth depth values outside the configured valid range during calibration, keeping calibration consistent with validation metrics.
  • Fixes FP16 segmentation with class-agnostic NMS.
  • Preserves YOLOE one-to-one classifier weights during linear probing, preventing a severe accuracy drop.

  • Makes pose activation-map gradients compatible with autograd and torch.compile.

  • 🖼️ Visualization and analytics improvements

  • Restores percentage labels in analytics pie charts.

  • Speeds up semantic-mask overlay rendering by replacing repeated full-image scans with a palette lookup.

  • ☁️ Expanded Ultralytics Platform workflows

  • Adds documented custom metadata support for datasets, images, projects, and models.
  • Supports nested metadata, metadata search, NDJSON image metadata, and Dataset Ingest API uploads.
  • Refreshes Platform integration screenshots and documents native Platform support for YOLOv8 and YOLOv5.

  • Refactors Platform callbacks to load only where needed, reducing unnecessary imports in prediction, validation, and export paths.

  • 🛡️ Reliability and infrastructure

  • Makes downloads atomic, preventing concurrent test or application processes from reading partially written files.
  • Updates CI runner images to Node.js 24 for compatibility with newer tooling.
  • Refreshes OpenVINO benchmark data across Intel CPUs and NPUs.
  • Improves documentation deployment detection when configuration defaults change.

🎯 Purpose & Impact

  • ✅ Fewer installation failures: Users relying on OpenCV image decoding now receive a compatible version automatically.
  • 🚀 Simpler YOLOE deployment: Prompt configurations can be prepared once and reused across multiple export targets.
  • 💾 Lower memory usage: Large ONNX and QNN calibration jobs are more practical, especially on limited-memory systems.
  • 🎥 More capable tracking: OBB tracking is now clearly supported, while unsupported tasks fail with actionable messages instead of obscure runtime errors.
  • 📈 Better model fine-tuning: YOLOE linear probing and depth calibration now preserve pretrained performance more reliably.
  • 🧩 Improved deployment compatibility: Dynamic CoreML exports and FP16 segmentation workflows are more robust.
  • 🔍 Better Platform organization: Custom metadata helps teams track provenance, review status, equipment, projects, and deployment context.
  • 📖 Clearer onboarding: The refreshed model documentation makes it easier to choose the right Ultralytics model and understand its supported modes.

What's Changed

New Contributors

Full Changelog: https://github.com/ultralytics/ultralytics/compare/v8.4.115...v8.4.116

Source: README.md, updated 2026-08-07