A recent social media post by user Lisan al Gaib has advised ChatGPT Plus subscribers to "use all of your o4-mini-high and o3 quota today." The "pro tip" shared on the platform suggests an urgency for users to maximize their current usage of OpenAI's advanced reasoning models before a potential reset or change.Additionally, the o3 and o4-mini-high models are premium AI capabilities offered to ChatGPT Plus users, designed for complex reasoning tasks, coding assistance, and advanced problem-solving. While o3 is known for its deep analytical rigor, o4-mini-high is optimized for faster, cost-efficient reasoning, particularly in technical domains. These models come with specific usage limits to ensure equitable access and system performance.OpenAI significantly increased these usage limits for ChatGPT Plus subscribers in April 2025, effectively doubling the previous quotas. Under the updated policy, the o3 model now allows for up to 100 messages per week, while the o4-mini model supports up to 300 messages per day. The o4-mini-high model, tailored for coding, typically offers a daily limit of 50 messages.Official OpenAI documentation clarifies that o3 quotas reset on a weekly basis, whereas o4-mini and o4-mini-high quotas reset daily. Therefore, the advice to "use all of your o3 quota today" would primarily be relevant if the current day marks the end of a user's weekly cycle. For o4-mini-high, maximizing daily usage aligns with its daily reset schedule.While the tweet provides a user-generated tip, subscribers are encouraged to consult official OpenAI resources for the most accurate and up-to-date information on their specific usage limits and reset schedules. This ensures optimal utilization of their subscription benefits and avoids any misunderstandings regarding quota management.