X adds real-time voice AI, drops structured outputs from API
What happened
Between the Feb 9, 2026 and Feb 18, 2026 captures of X's pricing page, Pulse recorded 2 changes: Structured outputs capability removed from the API capabilities section; Added Voice API capability: build real-time voice agents with speech-to-text, text-to-speech, and conversational AI. Marked as New. Pulse files it as a product change (feature change). Pulse's latest capture (Nov 9, 2026) lists grok-4.7 at $0.50 per 1M input tokens (cached) + $6 per 1M output tokens, grok-4.20-0309-reasoning at $2.50 per 1M output tokens + $0.40 per 1M input tokens (cached, long context), grok-imagine-video at $0.07 per output second (720p) + $0.01 per input second of video, grok-4.6 at $6 per 1M output tokens + $0.50 per 1M input tokens (cached) and grok-4.5 at $0.60 per 1M input tokens (cached, long context) + $2 per 1M input tokens.
X's previous recorded change was "X Introduces New grok-4.1 Models with Enhanced Image Input Pricing and Tool Calling Features" (Q4 2025). X has been tracked since 2025-10-11.
In the same window You.com, Synthesia, Read AI and Topaz Labs also changed their AI & Machine Learning pricing pages. Those moves are listed further down, and the Pulse Agent can compare them side by side.
- Removed—Feature
BeforeStructured outputs capability
AfterNot listed
- AddedVoice APIFeatureNot listedVoice API capability
| Plan | Field | Before | After | Change |
|---|---|---|---|---|
| — | Feature | Structured outputs capability | Not listed | Removed |
| Voice API | Feature | Not listed | Voice API capability | Added |
Values as written on X's public pricing page in the two captures Pulse compared; where the page states no number, the cells give the wording before and after.
Evidence
The two captures Pulse comparedFull-page captures of X's pricing page (x.ai) from Feb 9, 2026 and Feb 18, 2026; the change is marked around the middle of the page, where the Structured outputs capability no longer appears.
Sign in to see the evidence
The two full-page captures with this change marked up are free with an account.
X, the last 90 days
Full history- May 29, 2026PackagingX launches Grok coding model and image/video/voice API pricing
- May 19, 2026ImprovementX updates capabilities: New video generation feature added with audio.
- May 5, 2026Price decreaseX debuts grok-4.3 at $1.25/$2.50 per 1M tokens, slashes grok-4.20 rates
- Feb 18, 2026Feature changeX adds real-time voice AI, drops structured outputs from API This change
- Q4 2025PackagingX Introduces New grok-4.1 Models with Enhanced Image Input Pricing and Tool Calling Features
Across AI & Machine Learning in the same window
All AI & Machine Learning changes- You.comOct 26You.com adds Inference Router API to run open-weight models via one endpoint
- You.comAug 4You.com: Web Search API now freemium (free 100/day + $5/1k after)
- SynthesiaNov 9Synthesia swaps Syren AI time cap for tiered video quotas, cuts Basic assets
- Read AINov 9Read AI: EU & CA hosting added to Enterprise+ plan
- Topaz LabsNov 9Topaz Labs ends web sale: Pro back to $599/yr, Video $299, Image $199
Questions about this change
Did X raise prices in February 2026?
No list-price increase was recorded between Feb 9, 2026 and Feb 18, 2026. The change Pulse detected was a product change: feature change.
What changed on X's pricing page between Feb 9, 2026 and Feb 18, 2026?
Feature removed: Structured outputs capability; Voice API feature added: Voice API capability. Pulse compared the captures it took on Feb 9, 2026 and Feb 18, 2026; the before/after table above lists each item as written on the page.
How often does X change its pricing?
Pulse recorded 1 other pricing-page change for X in the 90 days before this one; the previous change was "X Introduces New grok-4.1 Models with Enhanced Image Input Pricing and Tool Calling Features" in Q4 2025; X has been tracked since 2025-10-11.