xAI: Grok lineup replaced (grok-4.3, grok-build-0.1), smaller context windows

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 (packaging change, limit lowered, feature added). 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.

This quarterly roll-up includes 3 changes Pulse first recorded in a shorter period: "X launches Grok coding model and image/video/voice API pricing" (week of May 18, 2026, saved May 25, 2026), "X updates capabilities: New video generation feature added with audio" (week of May 11, 2026, saved May 18, 2026) and "X debuts grok-4.3 at $1.25/$2.50 per 1M tokens, slashes grok-4.20 rates" (week of Apr 27, 2026, saved May 4, 2026). They are the same changes, not new ones. Before that, X's previous recorded change was "X adds real-time voice AI, drops structured outputs from API" (Feb 18, 2026). 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.