OpenAI Launches $100 ChatGPT Pro Plan with GPT-5.4 and Enhanced Codex Access

OpenAI released a new $100 per month Pro plan for ChatGPT, directly competing with Anthropic's Claude Max at the same price point. The tier offers five times more Codex usage than the existing Plus plan, with a temporary promotion doubling this advantage until May 31, 2026. Both the $100 and $200 Pro tiers provide access to the exclusive GPT-5.4 Pro model with native computer use and agentic capabilities for autonomous software navigation, along with unlimited use of GPT-5.4 Instant and GPT-5.4 Thinking. The launch follows OpenAI's strategic expansion beyond Microsoft partnerships, with internal memos highlighting "staggering" demand for their services on Amazon Bedrock.