GitHub is merging its separate Copilot chat tools into one thing: the GitHub Copilot Unified Agent Experience, rolling out no earlier than September 28, 2026. The short version — your chat history stops auto-deleting after a month, code reviews switch to a slower default that burns more credits, and Business or Enterprise seats become prepaid on October 1. None of it requires you to do anything, which is exactly why it’s worth five minutes of your attention now.
- The Unified Agent Experience merges Copilot Chat on github.com, GitHub Mobile, and the cloud coding agent into one interface starting September 28, 2026.
- Chat data retention jumps from 28 days to the life of your account — opting out drops Copilot Chat on web and mobile entirely, not just the new merged view.
- The default code review effort shifts from “Lite” to “Balanced” on the same date, which uses more AI Credits and Actions minutes per review.
- Copilot Business and Enterprise seats move to prepaid billing on October 1, 2026; new signups reopened September 1 with stricter account vetting.
- GitHub says list prices for AI Credits aren’t changing — but heavier defaults mean plenty of teams will burn through their allotment faster anyway.
What Actually Merges in the Unified Agent Experience
Right now, Copilot Chat on github.com, the GitHub Mobile app, and the cloud-based coding agent behave like three separate tools with three separate memories. The Unified Agent Experience collapses them into one continuous thread, so a conversation you start on your phone is supposed to pick up exactly where you left off at your desk.
That’s the pitch. The tradeoff shows up in data retention, and in how opting out works: GitHub hasn’t built a partial off-switch. Decline the unified experience and you lose Copilot Chat on web and mobile too, not just the merged version of it.
Your Chat History Now Sticks Around Forever
Under the current system, Copilot deletes your chat logs automatically after 28 days. Under the new one, GitHub keeps that history for the life of your account — indefinitely, unless you close the account entirely.
For a solo developer pasting the occasional snippet in, that’s probably not a big deal. For a team pasting proprietary code, API keys, or client data into Copilot Chat, it’s worth checking with whoever owns your org’s data policy before the September 28 cutover. Admins get a review window, but the setting is enabled by default. It echoes a pattern that’s shown up elsewhere this year too — Microsoft’s own Copilot merge on Windows raised similar questions when it folded several separate assistants into one, with fewer settings than people expected to control what got remembered.
Prepaid Seats and a Stricter Signup Process
Copilot Business and Enterprise plans currently let you add a seat mid-cycle and get a prorated refund if you remove it later. That flexibility ends on October 1, 2026: seats become prepaid at the start of each billing cycle, and revoking one early no longer refunds you anything.
New signups, which had been paused, reopened September 1 — but with tighter account vetting before access is granted. It’s a similar playbook to OpenAI briefly pausing new ChatGPT Pro sign-ups earlier this year while it caught up on capacity: tighten the front door first, adjust billing second. According to GitHub’s own changelog, list prices for seats and AI Credits stay exactly where they are — it’s the billing flexibility that disappears, not the price tag.
Old vs. New: Every Change Side by Side
Three changes, three different effective dates, and three different reasons to check your settings before they flip. Here’s how the old and new defaults compare.
| Change | Old Behavior | New Behavior | Effective Date |
|---|---|---|---|
| Chat data retention | Deleted after 28 days | Kept for the life of the account | Sept 28, 2026 |
| Code review default | “Lite” effort | “Balanced” effort (more credits used) | Sept 28, 2026 |
| Business/Enterprise seats | Pay-as-you-go, prorated refunds | Prepaid each cycle, no refunds | Oct 1, 2026 |
| New signups | Paused | Reopened with stricter vetting | Sept 1, 2026 |
If you only act on one row in that table, make it chat retention. It’s the one default that changes what happens to data you’ve already typed, not just what you’ll type going forward.
Frequently Asked Questions
When does the GitHub Copilot Unified Agent Experience roll out?
No earlier than September 28, 2026, per GitHub’s own changelog. Admins can review their org’s policies before then, but the merged experience is enabled by default once it reaches your account.
Will I lose my old Copilot chat history?
No. Existing conversations stay put. What changes is that new chats no longer auto-delete after 28 days — they’re kept for as long as your account exists.
Can I opt out of the Unified Agent Experience?
Yes, but not partially. There’s no setting that keeps just one surface, like desktop, while declining the rest — opting out removes Copilot Chat access on web and mobile as well.
Does GitHub Copilot cost more starting October 1?
List prices for seats and AI Credits aren’t changing. What changes is billing timing (prepaid, no prorated refunds) and a review default that uses more credits per run — so your actual spend can rise even though the price list looks the same.
Do these changes affect free or individual Copilot accounts?
The prepaid seat change only hits Business and Enterprise plans. The chat retention and code review default changes reach further across Copilot’s surfaces, so individual users should double-check their own settings too.
None of these three changes is dramatic on its own, and that’s exactly why they’re easy to miss until they’ve already taken effect. The one actually worth blocking time for is chat retention — quietly flipping from “deletes in a month” to “keeps forever” is the kind of change that should ask you to opt in, not force you to opt out. If your team pastes anything sensitive into Copilot Chat, spend the five minutes before September 28 to check what your org’s setting is actually doing.
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