OpenAI introduced a new $100 per month ChatGPT Pro plan on April 9, 2026, positioned directly between its $20 Plus tier and $200 Pro plan, and priced identically to Anthropic's Claude Max offering. The move reflects a fundamental shift in how developers are using AI coding tools, moving away from simple line-by-line code generation toward autonomous agents that can orchestrate complex, multi-step workflows across applications for hours at a time .

The new tier arrives as OpenAI's Codex coding tool has exploded in popularity. On April 8, 2026, the day before the plan's announcement, OpenAI announced that Codex had crossed three million weekly users, representing a 5x increase over the preceding three months and 70% month-over-month growth . This surge in demand prompted the company to create a pricing tier specifically designed for developers who exhaust their usage limits on the Plus plan but don't need the full capabilities of the $200 tier.

What Makes the $100 Plan Different From ChatGPT's Other Tiers?

The new $100 Pro plan offers five times more Codex usage than the $20 Plus plan, with a temporary launch promotion through May 31, 2026, that doubles this advantage to ten times the Plus allocation . Both the $100 and $200 Pro tiers provide access to the same model suite, including the exclusive GPT-5.4 Pro model, unlimited use of GPT-5.4 Instant and GPT-5.4 Thinking, and all other features available on the higher-priced tier. The key difference between the two Pro plans is usage volume, not capability.

OpenAI's pricing structure now includes six distinct tiers :

• Free Account: Includes advertising and basic access to ChatGPT models
• Go Plan: Costs $8 per month for users seeking a lightweight paid option
• Plus Plan: Priced at $20 per month with standard Codex usage limits
• Pro Plan (New): The $100 monthly tier targeting developers with higher coding demands
• Pro Plan (Premium): The existing $200 monthly tier offering 20 times the Codex usage of Plus
• Business and Enterprise: Custom-priced plans for organizations, starting at $25 per user per month

The $100 plan is explicitly designed for what OpenAI describes as "longer, high-effort Codex sessions" that Plus subscribers hit the ceiling on before their billing cycle ends . This positioning reflects a recognition that a significant segment of developers needs more than the Plus plan offers but may not require the full resources of the $200 tier.

Why Is OpenAI Making This Move Now?

The timing of the new tier is directly tied to how developers are actually using Codex. In February 2026, OpenAI rolled out a dedicated Codex app for macOS designed to move beyond simple line-by-line code generation into what the company calls "agentic, multi-task coding workflows" . This architecture allows developers to orchestrate multiple agents in parallel, run background jobs, and handle instructions that span hours rather than seconds. These longer-running sessions demand significantly more computing resources than traditional code completion.

The competitive context is equally important. Anthropic's Claude Max 5x tier, which also costs $100 per month, includes elevated limits for Claude Code, Anthropic's terminal-based agentic coding product. Claude Code has become the fastest-growing part of Anthropic's commercial portfolio, with an estimated $2.5 billion in annualized revenue by early 2026 . Anthropic has been actively building a developer ecosystem around Claude Code, launching a marketplace for Claude-powered enterprise software in March 2026 with launch partners including Snowflake, Harvey, and Replit.

"Three million people are now using Codex weekly, up from two million a little under a month ago," stated Thibault Sottiaux, who leads the Codex product.

Thibault Sottiaux, Codex Product Lead at OpenAI

The week before OpenAI's announcement, Anthropic made a controversial move by banning third-party agents from Claude Pro and Max subscriptions, preventing subscribers from routing their plan's usage limits through external frameworks such as OpenClaw . Users wanting to continue using those tools must now pay separately under a new per-session "extra usage" system. OpenAI's announcement went in the opposite direction, increasing Codex availability at the $100 price point and doubling it temporarily to mark the launch. The contrast, at the identical price point, was visible enough that most coverage described the new plan as a direct response to Anthropic's developer subscriber base.

How to Choose Between ChatGPT's Pro Tiers for Your Coding Needs

Developers deciding between ChatGPT's Pro plans should consider their typical usage patterns and the nature of their coding tasks :

• Plus Plan ($20/month): Best for developers who use Codex for occasional code completion, quick snippets, and day-to-day programming tasks that don't require extended autonomous sessions
• Pro Plan $100/month: Ideal for developers running longer, autonomous engineering workflows that exhaust Plus limits before the billing cycle ends, but who don't need the maximum Codex allocation of the $200 tier
• Pro Plan $200/month: Designed for power users and teams running intensive, multi-hour agentic coding sessions with 20 times the Codex usage of Plus, offering the highest usage ceiling available

The $100 plan represents OpenAI's acknowledgment that the gap between $20 and $200 left a significant segment of developers without a compelling upgrade path. Many developers using Codex for autonomous workflows hit the Plus plan's limits well before their billing cycle ends, making the jump to $200 feel excessive. The new tier fills that gap precisely.

What This Reveals About the Future of AI-Assisted Development

The launch of the $100 plan and the explosive growth of Codex signal a fundamental shift in how developers will interact with AI coding tools. GPT-5.4, which launched in March 2026 and introduced native computer use directly into Codex and the API, is the clearest statement of where OpenAI sees the next phase of developer adoption going . The company is betting not on prompting, but on autonomous agents operating software, navigating file systems, and running multi-step workflows across applications for hours at a time.

OpenAI's $122 billion funding raise at an $852 billion valuation, completed in March 2026 and led by SoftBank, NVIDIA, and Amazon, provided the capital to make this bet . The company is generating $2 billion in revenue per month and has more than 50 million paid subscribers across its plans. The $100 plan is part of a deliberate effort to capture the growing segment of developers adopting agentic coding workflows and to compete directly with Anthropic's Claude Code ecosystem.

Whether the $100 plan moves enough developers away from Anthropic's Claude Max offering to make a measurable difference in subscriber metrics will become visible in both companies' next quarterly earnings reports. For now, the plan represents OpenAI's clearest signal yet that the future of developer-focused AI is not about faster responses or better prompts, but about autonomous agents that can work independently for extended periods, handling complex engineering tasks with minimal human intervention.