NEW YORK — OpenAI has released its latest ChatGPT update on April 9, 2026, introducing GPT-5.3 Instant Mini as a smarter fallback model and launching a new $100-per-month Pro subscription tier, even as the company faces mounting public criticism, subscription cancellations and security concerns.

The incremental but meaningful improvements aim to enhance everyday conversations and give power users more capacity for advanced coding tasks through the Codex tool. GPT-5.3 Instant Mini replaces the previous fallback model and delivers more natural dialogue, stronger writing and better contextual awareness without appearing in the main model picker.

Users who hit rate limits on the primary GPT-5.3 Instant model will now encounter this refined mini version, which OpenAI says outperforms its predecessor across multiple use cases. The update also expands support for shared Outlook mailboxes and calendars in the Outlook Email and Calendar apps, allowing delegated access for reading, organizing, sending mail and managing events.

Simultaneously, OpenAI introduced a new $100 monthly Pro plan positioned as a direct challenge to rival Anthropic's Claude offerings. The tier provides five times more Codex usage than the existing $20 Plus plan and includes higher overall limits for demanding professional workflows. Existing Plus and Pro users received adjustments to how Codex credits are allocated.

The April 9 rollout comes just days after OpenAI added ChatGPT integration with Apple CarPlay on April 2, enabling hands-free voice conversations while driving. Enterprise and education customers will receive the CarPlay feature in coming weeks.

These technical enhancements arrive against a backdrop of significant controversy. Reports indicate that more than 2.5 million users have either canceled their ChatGPT subscriptions or publicly pledged to stop using the service following OpenAI's decision to integrate its models with U.S. military systems. App uninstalls reportedly spiked nearly 300% in a single day, and rival Anthropic's Claude briefly topped the App Store charts.

Protests erupted outside OpenAI's offices in San Francisco, reflecting broader unease about the rapid commercialization and military applications........

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