Cost Tracking
Every API response now includes the exact cost of the request via a cost_in_usd_ticks field in the usage object. Works across chat completions, Responses API, image generation, video generation, and streaming.
xAI changelog: April 2026
5 releases from to
Everything xAI shipped in April 2026, collected from official xAI sources. Each entry is dated and links to the page it came from.
April 2026 at a glance
April 2026 was xAI's 2nd busiest month of the 12 months to then: 5 releases, about 1.6× its monthly average of 3. That was 3 releases fewer than March 2026. Most were API (4), followed by Model (1).
Releases
5
-3 vs March 2026
Rank of 12 months
2nd
Average 3.1 a month
Most shipped
API
4 releases
Notable xAI launches in April 2026
- Model
Grok Voice Think Fast 1.0
You can now use grok-voice-think-fast-1.0 with the Speech to Speech API. To get started, check out the Speech to Speech docs. For more details, see our blog post .
Source: xAI Release Notes - API
Cost Tracking
Every API response now includes the exact cost of the request via a cost_in_usd_ticks field in the usage object. Works across chat completions, Responses API, image generation, video generation, and streaming.
Source: xAI Release Notes - API
Files API TTL
You can now set an expiration policy on uploaded files using expires_after or an explicit expires_at timestamp. Expired files are automatically deleted.
Source: xAI Release Notes
All xAI releases in April 2026
Newest first. Each entry links to the official page it came from.
April 20265 releases
Files API TTL
You can now set an expiration policy on uploaded files using expires_after or an explicit expires_at timestamp. Expired files are automatically deleted.
Grok Voice Think Fast 1.0
You can now use grok-voice-think-fast-1.0 with the Speech to Speech API. To get started, check out the Speech to Speech docs. For more details, see our blog post .
Speech to Text API GA
General availability of xAI Speech to Text API
Speech to Text API
The xAI Speech to Text API is now generally available. Transcribe audio to text in 25 languages with batch and streaming modes.
Where April 2026 sits
xAI releases per month, for April 2026 and the 11 months before it. A taller bar means more releases that month; the dated entries for each month are on its own page.
Other companies in April 2026
14 of the companies we track shipped in April 2026; xAI ranks 6th by number of releases.
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