Claude利用制限をリセット、OpenAIも追従—生成AI企業が相次ぎ上限撤廃

On July 16 (Japan time), Anthropic announced that it was resetting the usage limits on Claude, its flagship AI service, removing both the 5-hour and 1-week restrictions that had previously applied. The move came as part of a broader competitive maneuver in the generative AI market. Within hours of Anthropic's announcement, Thibault Sottiaux, an executive at rival firm OpenAI, posted on X (formerly Twitter) that OpenAI would also reset weekly usage limits on ChatGPT Work, its desktop PC application, and on Codex, its AI-powered coding tool. This tit-for-tat response underscores the high-stakes rivalry between the two companies as they battle for user attention and retention. The reset announcements were not isolated incidents. Both Anthropic and OpenAI had already conducted similar limit resets on July 9, just one week earlier, making the July 16 resets the second round of this 'reset competition' in as many weeks. The rapid cadence of these policy changes highlights how closely the two firms are tracking each other's strategic moves and how willing they are to adjust their terms of service to maintain competitive parity.

The rapid sequence of usage-limit resets by Anthropic and OpenAI within a single week reflects the intensifying competition for market share in the generative AI space. By removing constraints on how much users can access their services, both companies are signaling a shift in strategy: rather than rationing access, they are competing on the basis of unrestricted availability. The near-simultaneous nature of these announcements—with OpenAI responding to Anthropic's move within hours—indicates that each company is closely monitoring the other's moves and reacting swiftly to avoid losing users to competitors. This pattern of tit-for-tat policy changes suggests that the competitive dynamics of the AI market are driving companies toward more generous user terms as a differentiator.

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