Grok - AI Chat & Video v1.3.66 quietly paywalls core features with severe usage limits, April 2026

The official App Store release notes for version 1.3.66 vaguely cite "- Improvements to Chat, Voice and Imagine".^[1] Behind this generic changelog, the publisher executed a major backend overhaul of the app's usage quotas. Free users now face aggressive throttling, with Expert mode and the Imagine feature placed behind the SuperGrok subscription tierGlossarySubscription TierA distinct subscription level with its own price and feature set — typically 2-4 tiers (e.g., Free / Plus / Pro / Premium) covering different willingness-to-pay segm.... The update fundamentally shifts the app from a freemiumGlossaryFreemiumA business model where the app is free to install and use at a baseline level, with premium features, ad removal, or higher quotas gated behind a one-time or recurri... conversational tool to a strictly pay-to-use model for advanced functions.

The transition immediately broke established workflows for the free user base. Features that functioned normally in previous versions now trigger a persistent "High Demand" error, which acts as a hard block rather than a temporary server delay. Users report being unable to access Expert mode entirely, while voice mode suffers from artificial interruptions designed to prompt upgrades.

Reddit users on r/grok report that these AI modes are now subject to a strict 24-hour reset timer, suggesting the "High Demand" message functions as a deliberate paywall strategy.^[2]

The sudden restriction of free features caused the app's rating to fall from 3.74 to 2.4 stars, a steep drop of 1.34 stars. Prior to the update, users praised the free access, with a 5-star reviewer on version 1.3.64 noting it was a "Fantastic AI Video Maker... free to use." Following the April 21 release, sentiment shifted entirely toward the forced monetization. "To use the app you literally have to pay," stated a 1-star reviewer on version 1.3.66. Another user criticized the constant upselling, writing that "everyday when I try to use it says use super grok."

The publisher likely introduced these limits to manage the massive compute costs required to run heavy AI models at scale. The explosive growth of the free tier likely strained server capacity, prompting X Corp. to deprioritize unpaid accounts and aggressively monetize the user base through the SuperGrok tiers.

Grok currently serves an audience of nearly 3.4 million downloads in the last 30 days across the US iOS market. The financial and reputational stakes of this monetization update are immense. The sudden paywalling of core features threatens to alienate a massive segment of this established audience. This friction will potentially drive casual users to competitors like Claude or ChatGPT, a migration path explicitly threatened in several post-update reviews.

The severe rating drop suggests that Grok's user acquisition and retentionGlossaryRetention (D1 / D7 / D30)The percentage of users from a cohort who return to the app N days after install. D1 = day-1 retention, D7 = 7-day, D30 = 30-day. The single most important non-reven... will likely suffer over the coming weeks unless X Corp. relaxes the free tier limits. The aggressive pushGlossaryPush NotificationA message delivered to a user's device from your app's server — the single biggest re-engagement lever in mobile, when done well, and a fast path to uninstall when d... toward SuperGrok subscriptions appears to be a calculated risk that may increase short-term revenue, but it could permanently damage the app's reputation among casual users. Competitors like Anthropic and OpenAI will likely benefit from this exodus of frustrated users seeking reliable free alternatives.