OpenAI and Anthropic have launched a competitive battle in the AI coding tool market, each offering incentives to attract developers. On May 14, OpenAI CEO Sam Altman announced that enterprise users switching to Codex within 30 days will receive two months of free access, supported by a seamless migration tool. Simultaneously, Anthropic increased the weekly usage limit for its Claude Code by 50% for various user tiers, valid until July 13. This strategic move by both companies highlights the intense competition in the AI coding sector, which has seen rapid growth in 2026. OpenAI's Codex aims to leverage its ecosystem, including ChatGPT and GPT-5, to gain market share, while Anthropic focuses on enhancing user experience and computational resources. Both companies are preparing for potential IPOs later this year, emphasizing user base expansion over immediate profitability.