Threads Video and Image Sizes 2026

Threads and Instagram share the same infrastructure, which makes cross-posting straightforward for image and video size requirements. But there are practical differences in how content performs on each platform.

What stays the same: Video specs are identical (9:16, 1080x1920px, H.264, up to 5 minutes, 1GB). Image specs are the same (1080x1080px square, up to 10 images per post, 5MB per image). A single export works for both.

What changes: Character limit. Threads allows 500 characters per post. Instagram captions allow 2,200 characters but only show the first ~125 in the feed. On Threads, the entire 500-character post is visible without truncation — this changes how you write. Threads rewards conversational, complete thoughts rather than caption hooks with "...more."

Link handling: Instagram does not allow clickable links in feed post captions. Threads supports links in post text that display as preview cards. This is a significant difference — Threads posts can drive direct website traffic in a way Instagram feed posts cannot.

Hashtags: Instagram hashtags still provide some discoverability benefit. Threads hashtags currently have limited algorithmic weight. Don't bother copy-pasting Instagram hashtag stacks to Threads.

Audience: Threads is text-forward and conversation-driven. Instagram is visual-first. The same image can perform well on both, but a text-only Threads post has no Instagram equivalent. Threads rewards opinions, threads (multi-post sequences), and direct engagement.

Threads launched its official API in 2024, enabling third-party tools to schedule and publish posts. This matters for creators who want to automate their Threads image and video posting alongside other platforms.

What the API supports: Text posts, image posts (up to 10 images), video posts (1 video per post), and carousel posts. Replies and thread chains are also supported. The API follows the same Threads image and video size requirements as manual posting.

Authentication: Threads uses Meta's OAuth 2.0 flow. The same login that connects Instagram to a third-party scheduler can be used for Threads with a separate permission scope. They are independent connections even though they use the same Meta account.

Rate limits: The Threads API allows up to 250 API calls per hour. For normal scheduling use, this is not a constraint. Bulk import workflows that create many posts at once need to throttle requests.

Availability: Threads API access requires a Meta developer account. Xroad Studio's Threads integration handles the OAuth connection — you connect your account once and can schedule Threads posts alongside your other platforms from the same dashboard. No separate developer setup needed. The platform itself is at threads.net.

Threads and X compete directly for the same audience: people who want short-form text with media. The key differences in 2026: Threads has 500-character posts vs X's 280 (standard), Threads has no paid subscription required for longer posts, and Threads' algorithm is more transparent about what it distributes.

X has a larger existing audience and stronger breaking-news culture. Threads has faster growth and more predictable organic reach. The practical answer: post to both. They take identical content — same video, same caption adapted for 500 vs 280 characters.

Xroad Studio posts to both Threads and X simultaneously from one upload, handling any format differences automatically. Threads is available at threads.net.