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.

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)