xAI: Grok lineup replaced (grok-4.3, grok-build-0.1), smaller context windows
What happened
Between the Mar 30, 2026 and Jun 30, 2026 captures of X's pricing page, Pulse recorded 3 changes: Replaced grok-4.20-reasoning/non-reasoning ($2.00/$6.00) and grok-4-1-fast ($0.20/$0.50) with grok-4.3 ($1.25/$2.50) and grok-build-0.1 ($1.00/$2.00); Imagine and Voice API pricing now itemized. Context window reduced from 2M tokens (all prior flagship models) to 1M (grok-4.3) and 256k (grok-build-0.1). Added File management capability - upload and search/reason over PDFs, spreadsheets, and presentations. In detail: Flagship API model lineup fully replaced: grok-4.20-reasoning/non-reasoning ($2.00/$6.00) and grok-4-1-fast ($0.20/$0.50) removed; grok-4.3 ($1.25/$2.50) and grok-build-0.1 ($1.00/$2.00) added. Imagine and Voice API pricing now itemized on the page; Context window reduced across flagship models: prior lineup offered 2M tokens; new grok-4.3 offers 1M and grok-build-0.1 offers 256k; Added File management capability: upload documents and let Grok intelligently search and reason over PDFs, spreadsheets, presentations, and more. Pulse files it as a packaging change (package change, limit decrease, feature added) with a downward 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.
It lands 36 days after X's previous change, "X launches Grok coding model and image/video/voice API pricing" (May 29, 2026). Before that Pulse recorded "X updates capabilities: New video generation feature added with audio" (May 19, 2026) and "X debuts grok-4.3 at $1.25/$2.50 per 1M tokens, slashes grok-4.20 rates" (May 5, 2026). 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.
- grok-4.3, grok-build-0.1, Voice API · PackagingPackage change
Flagship API model lineup fully replaced: grok-4.20-reasoning/non-reasoning ($2.00/$6.00) and grok-4-1-fast ($0.20/$0.50) removed; grok-4.3 ($1.25/$2.50) and grok-build-0.1 ($1.00/$2.00) added. Imagine and Voice API pricing now itemized on the page.
- grok-4.3, grok-build-0.1 · LimitLimit decrease
Context window reduced across flagship models: prior lineup offered 2M tokens; new grok-4.3 offers 1M and grok-build-0.1 offers 256k.
- — · FeatureAdded
BeforeNo File management capability
AfterFile management capability
| Plan | Field | Before | After | Change |
|---|---|---|---|---|
| grok-4.3, grok-build-0.1, Voice API | Packaging | Flagship API model lineup fully replaced: grok-4.20-reasoning/non-reasoning ($2.00/$6.00) and grok-4-1-fast ($0.20/$0.50) removed; grok-4.3 ($1.25/$2.50) and grok-build-0.1 ($1.00/$2.00) added. Imagine and Voice API pricing now itemized on the page. | Package change | |
| grok-4.3, grok-build-0.1 | Limit | Context window reduced across flagship models: prior lineup offered 2M tokens; new grok-4.3 offers 1M and grok-build-0.1 offers 256k. | Limit decrease | |
| — | Feature | No File management capability | File management 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 Mar 30, 2026 and Jun 30, 2026; the change is marked around the middle of the page, where File management capability now appears.
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X, the last 90 days
Full history- Aug 24, 2026packagingX drops grok-4.5, adds Imagine image/video models and free Playground perk
- Aug 5, 2026packagingx.ai: Speech-to-Speech Voice API pricing changed from flat rate to starting-at
- Jul 13, 2026packagingX swaps flagship model — grok-4.5 costs more, sees less, drops coding model
- Jul 4, 2026improvedxAI: Grok lineup replaced (grok-4.3, grok-build-0.1), smaller context windows · this change
- 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
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 June 2026?
No list-price increase was recorded between Mar 30, 2026 and Jun 30, 2026. The change Pulse detected was a packaging change: package change, limit decrease, feature added.
What changed on X's pricing page between Mar 30, 2026 and Jun 30, 2026?
Flagship API model lineup fully replaced: grok-4.20-reasoning/non-reasoning ($2.00/$6.00) and grok-4-1-fast ($0.20/$0.50) removed; grok-4.3 ($1.25/$2.50) and grok-build-0.1 ($1.00/$2.00) added. Imagine and Voice API pricing now itemized on the page; Context window reduced across flagship models: prior lineup offered 2M tokens; new grok-4.3 offers 1M and grok-build-0.1 offers 256k; feature: No File management capability → File management capability, added. Pulse compared the captures it took on Mar 30, 2026 and Jun 30, 2026; the before/after table above lists each item as written on the page.
How often does X change its pricing?
Pulse recorded 3 other pricing-page changes for X in the 90 days before this one; the previous change was "X launches Grok coding model and image/video/voice API pricing" on May 29, 2026; X has been tracked since 2025-10-11.