Write, pick and schedule X posts with ChatGPT
Ask ChatGPT for ten versions, keep the three you would actually post, and let it spread them across the week on X. Postika checks the 280-character limit on each.
X publishing specs
Limits Postika checks before scheduling
| Caption length | 280 docs.x.com |
|---|---|
| Images per post | 4 docs.x.com |
| Image formats | JPG, PNG, GIF, WEBP docs.x.com |
| Video formats | H.264, AAC docs.x.com |
| Min video length | 0.5 s docs.x.com |
| Max video length | 20 min docs.x.com |
| Video resolution | 32x32–1280x1024 px docs.x.com |
| Aspect ratios | 1:3–3:1 docs.x.com |
| Max file size | JPG/PNG/WEBP 5 MB · GIF 15 MB · MP4 8 GB docs.x.com |
| Alt text | 1000 docs.x.com |
Official limits from the network's documentation (checked November 5, 2026). Postika enforces its own limits where they are lower.
Step by step
- 1
Tell ChatGPT the topic and the angle you want.
- 2
Ask for several variations under 280 characters.
- 3
Choose the ones to keep and tell ChatGPT the days and times.
- 4
ChatGPT schedules them in Postika (or leaves them for approval if you prefer).
Example prompts
- Give me 10 X posts about why small shops should collect emails. Under 240 characters each, no hashtags. Number them.
- Schedule numbers 2, 6 and 9 on Tuesday, Wednesday and Thursday at 08:45.
- Write an X post for our product launch with the link and leave it pending approval at 16:00 today.
- Turn this customer quote into an X post with attribution, under 280 characters. Draft.
- What's scheduled on X tomorrow? If nothing, write and schedule one post about our Friday opening hours at 10:00.
X limits in Postika
| Rule | Postika |
|---|---|
| Text | 280 characters |
| Images | Up to 4 (added in the app) |
| Video | One per post (added in the app) |
| Text-only | Allowed |
| Threads | Not supported |
Text-only posts mean ChatGPT can create X posts in schedule mode and they go out on time. Postika still defaults to approval, so if you want posts to go out without review, say "schedule" in the prompt. Media is always added in the Postika app. Full notes: X scheduling.
Variations, then a schedule
ChatGPT is quick at producing variations, which suits X: a hook that works is often the fifth version, not the first. Ask for a numbered list, pick your favorites, and then ask ChatGPT to schedule only those. Because ChatGPT can read your calendar with list_posts, ask it to avoid days that already have an X post.
If you post the same message elsewhere, have ChatGPT adapt it rather than copy it: Threads allows 500 characters, LinkedIn 3,000. See cross-posting and ChatGPT for Threads. For condensing long documents into posts, the Claude X guide has a different workflow.
What to expect from Postika on X
Postika publishes your posts and keeps your calendar. It does not show impressions, reply to mentions or repost content automatically. If you want to measure clicks, add UTM parameters to links with the UTM builder. X is included in every plan from €29/month (pricing).
Using approval on X even though you don't need it
Text-only X posts could all be scheduled directly, but keeping approval for anything that mentions a price, a date or another company is a good habit. It takes seconds to approve in the calendar, and it catches the one post where the model guessed a date or invented a detail. For routine posts (a weekly tip, a link to your newsletter), switch to schedule once you trust the prompt.
Turn ChatGPT into your social media scheduler
- 1
In Postika, create a project and connect the channels you want ChatGPT to use.
- 2
In ChatGPT, open Settings → Apps & Connectors → Advanced settings and turn on Developer mode.
- 3
Back in Apps & Connectors, click Create. Paste
https://postika.app/api/mcpand choose OAuth as the authentication. - 4
Click Create, then click Allow in the Postika window that opens.
- 5
In a new chat, enable the Postika connector from the composer and ask "Which channels do I have in Postika?" to confirm it works.
Frequently asked questions
Can ChatGPT post on X (Twitter)?
Yes, through Postika. Once connected, ChatGPT can create, schedule or publish X posts on the accounts you connected in Postika.
Can ChatGPT schedule a Twitter thread?
Not in Postika, which publishes single posts. Schedule several standalone posts instead.
Can ChatGPT attach an image to an X post?
Not through the connector. Create the post pending approval and add up to 4 images in Postika.
Keep reading
- Schedule posts on X (Twitter)Schedule posts on X (Twitter) with up to 4 images. Postika checks the 280-character limit and publishes at the right time in your project's time zone.
- Turn ChatGPT into your social media schedulerConnect ChatGPT to Postika in developer mode and let it write, schedule and list posts on Instagram, LinkedIn, X and 6 more networks, with your approval.
- Get Claude to say it in 280 characters and schedule it on XLet Claude condense long docs into 280-character X posts and schedule them in Postika. Text-only posts publish without opening the app. No threads.
- A month of LinkedIn posts from one ChatGPT chatUse ChatGPT to plan a month of LinkedIn posts for your LinkedIn account and schedule them in Postika. 3,000 characters, up to 9 images.
- Reuse your best ideas on Threads with ChatGPTLet ChatGPT shorten your Instagram captions and other posts into Threads posts under 500 characters and schedule them in Postika. Text-only allowed.