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) with a neutral direction. Pulse's latest capture (Oct 12, 2026) lists grok-4.3 at $1.25 per 1M input tokens + $2.5 per 1M output tokens, grok-build-0.1 at $1 per 1M input tokens + $2 per 1M output tokens, grok-imagine-image-quality at $0.01 per input image + $0.05 per output image (1K resolution), grok-imagine-image at $0 per input image + $0.02 per output image (1K resolution) and grok-imagine-video at $0.01 per input second of video + $0 per input image.
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, fal, Voxel51, Upstage and Together AI also changed their AI & Machine Learning pricing pages. Those moves are listed further down, and the Pulse Agent can compare them side by side.
- — · FeatureRemoved
BeforeStructured outputs capability
AfterNo Structured outputs capability
- Voice API · FeatureAddedNo Voice API capabilityVoice API capability
| Plan | Field | Before | After | Change |
|---|---|---|---|---|
| — | Feature | Structured outputs capability | No Structured outputs capability | Removed |
| Voice API | Feature | No Voice API capability | 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.
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X, the last 90 days
Full history- May 29, 2026improvedX launches Grok coding model and image/video/voice API pricing
- May 19, 2026improvedX updates capabilities: New video generation feature added with audio.
- May 5, 2026decreaseX debuts grok-4.3 at $1.25/$2.50 per 1M tokens, slashes grok-4.20 rates
- Feb 18, 2026improvedX 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.comAug 4You.com: Web Search API now freemium (free 100/day + $5/1k after)
- falOct 19fal doubles Flux 3 Image edit price to $0.048 per megapixel
- Voxel51Oct 19Voxel51 slashes Custom-tier compute hours 71% as it adds free plan
- UpstageOct 19Upstage API deepens Solar Pro 4 promo to 70% off through Oct 19
- Together AIOct 19Together AI lists Muse Spark Open, Reflection Beam, Nemotron 3.5 Super VL
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: Structured outputs capability → No Structured outputs capability, removed; Voice API feature: No Voice API capability → Voice API capability, added. 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.