X Introduces New grok-4.1 Models with Enhanced Image Input Pricing and Tool Calling Features
What happened
Between the Oct 11, 2025 and Jan 5, 2026 captures of X's pricing page, Pulse recorded 6 changes: grok-3 model removed from main pricing table; Image Input pricing capability added to grok-4.1-fast models at $0.20/M tokens; grok-3-mini model removed from main pricing table; Tool calling feature enhanced with Agent Tools API supporting both server-side and client-side tool calling; grok-4-1-fast-reasoning model added: $0.20/M tokens input, $0.50/M tokens output, 2M context; grok-4-1-fast-non-reasoning model added: $0.20/M tokens input, $0.50/M tokens output, 2M context. Pulse files it as a packaging change (plan removed, feature added, feature change, new plan) 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.
X's previous recorded change was "X Introduces Grok-4 Flagship Model with 256k Context Window and New Enterprise Features" (Q3 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.
- — · PlanRemovedgrok-3 modelNo grok-3 model
- Image Input · FeatureAdded
BeforeNo Image Input pricing capability
AfterImage Input pricing capability
- — · PlanRemovedgrok-3-mini modelNo grok-3-mini model
- — · FeatureFeature change
Tool calling feature enhanced with Agent Tools API supporting both server-side and client-side tool calling
- — · PlanAdded
BeforeNo grok-4-1-fast-reasoning model
Aftergrok-4-1-fast-reasoning model
- — · PlanAdded
BeforeNot listed
Aftergrok-4-1-fast-non-reasoning model
| Plan | Field | Before | After | Change |
|---|---|---|---|---|
| — | Plan | grok-3 model | No grok-3 model | Removed |
| Image Input | Feature | No Image Input pricing capability | Image Input pricing capability | Added |
| — | Plan | grok-3-mini model | No grok-3-mini model | Removed |
| — | Feature | Tool calling feature enhanced with Agent Tools API supporting both server-side and client-side tool calling | Feature change | |
| — | Plan | No grok-4-1-fast-reasoning model | grok-4-1-fast-reasoning model | Added |
| — | Plan | Not listed | grok-4-1-fast-non-reasoning model | 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 Oct 11, 2025 and Jan 5, 2026; the change is marked in the lower part of the page, where the grok-3 model no longer appears.
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X, the last 90 days
Full history- 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
- Q4 2025packagingX Introduces New grok-4.1 Models with Enhanced Image Input Pricing and Tool Calling Features · this change
- Q3 2025packagingX Introduces Grok-4 Flagship Model with 256k Context Window and New Enterprise 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 January 2026?
No list-price increase was recorded between Oct 11, 2025 and Jan 5, 2026. The change Pulse detected was a packaging change: plan removed, feature added, feature change, new plan.
What changed on X's pricing page between Oct 11, 2025 and Jan 5, 2026?
Plan: grok-3 model → No grok-3 model, removed; Image Input feature: No Image Input pricing capability → Image Input pricing capability, added; plan: grok-3-mini model → No grok-3-mini model, removed; Tool calling feature enhanced with Agent Tools API supporting both server-side and client-side tool calling; plan: No grok-4-1-fast-reasoning model → grok-4-1-fast-reasoning model, added; plan: Not listed → grok-4-1-fast-non-reasoning model, added. Pulse compared the captures it took on Oct 11, 2025 and Jan 5, 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 Grok-4 Flagship Model with 256k Context Window and New Enterprise Features" in Q3 2025; X has been tracked since 2025-10-11.