Model Tracker

SAM 3.1

SAM 3.1 is an AI model made by Meta. Meta released it on 27 March 2026. It is generally available. Its weights are open.

In inglese

Released: 27 March 2026 — ai.meta.com, read 16 October 2026
Status: Generally available — github.com, read 16 October 2026
Takes: Text, Image, Video — huggingface.co, read 16 October 2026
Returns: Not confirmed: two readings disagree: image, video and text
Open weights: Yes — github.com, read 16 October 2026
Licence: Not confirmed: two readings disagree: SAM License and other
Context window: Not confirmed: The official SAM 3.1 pages reviewed do not print a context-window value in tokens.
Longest answer: Not confirmed: The official SAM 3.1 pages reviewed do not print a standard maximum output length in tokens.
Knowledge cutoff: Not confirmed: The official SAM 3.1 pages reviewed do not state a knowledge-cutoff date.
API price, input: Not confirmed: No standard API input price for SAM 3.1 is printed on the official Meta pages reviewed.
API price, output: Not confirmed: No standard API output price for SAM 3.1 is printed on the official Meta pages reviewed.
Where: Not confirmed: two readings disagree: weights, app and api, weights
Parameters: Not confirmed: The official repository prints a parameter count for SAM 3, but the SAM 3.1 pages reviewed do not state a parameter count for SAM 3.1 specifically.
Model card: https://huggingface.co/facebook/sam3.1 — huggingface.co, read 16 October 2026

Questions

Meta released SAM 3.1 on 27 March 2026.

Yes: it is generally available, as Meta states it.

Yes: Meta publishes the weights of SAM 3.1 for download.

SAM 3.1: Faster and More Accessible Real-Time Video Detection and Tracking With Multiplexing and Global Reasoning (read 16 October 2026)
SAM 3: Segment Anything with Concepts (read 16 October 2026)
Release Notes (read 16 October 2026)
facebook/sam3.1 (read 16 October 2026)
LICENSE (read 16 October 2026)