New Release: Ultralytics v8.3.239

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:rocket: Ultralytics v8.3.239 is live!

Quick overview: v8.3.239 makes SAM 3 text prompting truly plug-and-play :puzzle_piece:, adds real-time disk/network throughput to SystemLogger() :chart_increasing:, cleans up noisy warnings :bell_with_slash:, and broadens ONNX export support (including Jetson JetPack 6) :package:—plus improved contributor attribution in the docs :handshake:.

Upgrade anytime with pip install -U ultralytics.

:puzzle_piece: New Features

SAM 3 text prompting is now plug‑and‑play :speech_balloon:

Text prompting with SAM 3 is simpler and more standard:

  • Switched from the custom SAM3 tokenizer to CLIP’s built-in SimpleTokenizer()
  • Removed the need to download/pass bpe_simple_vocab_16e6.txt.gz
  • SAM3SemanticPredictor and SAM3VideoSemanticPredictor no longer accept bpe_path
  • If clip isn’t installed, Ultralytics will auto-install it from the Ultralytics CLIP repo
  • Docs and navigation updated accordingly

Implemented in PR Use CLIP tokenizer functionality and remove the need of bpe_simple_vocab for SAM3 by @Y-T-G.

Minimal example:

from ultralytics import SAM

model = SAM("sam3.pt")
results = model.predict("image.jpg", texts=["person", "dog"])

:chart_increasing: Improvements

SystemLogger() now supports real-time I/O throughput

SystemLogger.get_metrics() now supports rates=True to report disk/network MB/s:

  • Disk: read_mbs, write_mbs
  • Network: recv_mbs, sent_mbs

This is especially helpful for spotting dataset loading bottlenecks or slow storage/networked filesystems.

Added in PR SystemLogger rate mode by @glenn-jocher, plus follow-up updates in PR SAM3 and SystemLogger() improvements by @glenn-jocher.

from ultralytics.utils import SystemLogger

logger = SystemLogger()
metrics = logger.get_metrics(rates=True)
print(metrics)

Cleaner, more focused logs :bell_with_slash:

Warning suppression is now centralized to reduce repeated noise during training/export runs, and TensorBoard graph logging is more resilient with a clearer fallback + single informative warning.

Shipped in PR Centralize warning suppression by @glenn-jocher.

ONNX export support expanded (including Jetson JetPack 6) :package:

ONNX requirements were updated to support newer versions (up to <2.0.0, including 1.20.0), removing older caps and simplifying Jetson environments.

Delivered in PR feat: :package: update onnx version to 1.20.0 by @onuralpszr.

:bug: Bug Fixes / Maintenance

Docs & contributor attribution improvements :books::handshake:

Docs now better credit contributors with expanded GitHub author mappings, avatars, aliases, and team mappings.

Merged in PR Restore GitHub authors with avatars and usernames by @glenn-jocher.

CI upkeep :toolbox:

GitHub Actions updated: actions/download-artifact bumped v6 → v7.

Handled in PR Bump actions/download-artifact from 6 to 7 by @dependabot[bot].

:link: Release links

You can review the full release details in the Ultralytics v8.3.239 release page, and browse all changes in the v8.3.238…v8.3.239 full changelog.

:raising_hands: Try it & share feedback

Give v8.3.239 a spin—especially if you use SAM 3 prompting, TensorBoard, or ONNX export on Jetson—and let us know what you find (wins, regressions, or ideas). Community feedback helps keep Ultralytics YOLO sharp for everyone.