xAI changelog: September 2025

3 releases from Sep 15 to September 15, 2025

Everything xAI shipped in September 2025, collected from official xAI sources. Each entry is dated and links to the page it came from.

September 2025 at a glance

September 2025 was xAI's 3rd busiest month of the 11 we had tracked by then: 3 releases, close to its monthly average of 3. That was 1 release more than August 2025. Most were API (2), followed by Developer Tools (1).

Releases

+1 vs August 2025

Rank of 11 months

3rd

Average 2.7 a month

Most shipped

API

2 releases

Notable xAI launches in September 2025

APISep 15
Responses API GA
Responses API general availability for stateful processing
Source: xAI Release Notes
APISep 15
Responses API
You can now use our stateful Responses API to process requests.
Source: xAI Release Notes
Developer ToolsSep 15
Responses API is generally available
You can now use our stateful Responses API to process requests.
Source: xAI Release Notes

All xAI releases in September 2025

Newest first. Each entry links to the official page it came from.

September 20253 releases

Sep 15

Responses API is generally available

You can now use our stateful Responses API to process requests.

Grok APIDeveloper ToolsSource: xAI Release Notes

Sep 15

Responses API GA

Responses API general availability for stateful processing

Grok APIAPISource: xAI Release Notes

Sep 15

Responses API

You can now use our stateful Responses API to process requests.

Grok APIAPISource: xAI Release Notes

Where September 2025 sits

xAI releases per month, for September 2025 and the 10 months before it. A taller bar means more releases that month; the dated entries for each month are on its own page.