OpenAI Codex lead Thibault Sottiaux, or Tibo, announced another full usage reset on Oct. 15 Taipei time as his 28-day challenge reached Day 10. It was the third reset day in the stretch, following earlier resets on Day 6 and Day 8.
At 12:55 p.m. Taipei time on Oct. 15, Sottiaux posted on X: 「Day 10/ Reset」. He also wrote, 「The reports of my reset button being lost are greatly exaggerated」.
Third reset replaces a product improvement
Sottiaux launched the 28-day challenge in the early hours of Oct. 5, Taipei time. Under the rule he posted then, each day would bring either 「one thing that is a clear improvement and relevant for most codex/work users」 or a full reset.
In practice, a full reset restores usage limits for ChatGPT Work and Codex across both the five-hour quota and the weekly quota.
As of Oct. 15, the challenge had run for 10 days. Day 6 on Oct. 11, Day 8 on Oct. 13, and Day 10 on Oct. 15 all ended with full resets, with one day between each of those reset announcements.
What shipped from Day 3 to Day 10
Across the eight days from Day 3 through Day 10, five days produced improvements and three days delivered full resets. Dates below follow the Taipei-time posting day.
- Day 3, Oct. 8: ChatGPT rolled out GPT-6 to all users, while paid accounts received one extra banked reset.
- Day 4, Oct. 9: users could make adjustments while a task was running, with the model responding in real time, and GPT-6.1 Sol Ultrafast was introduced.
- Day 5, Oct. 10: the Codex desktop app began suggesting a user’s next input, and usage under the Pro plan did not count against limits.
- Day 6, Oct. 11: full reset.
- Day 7, Oct. 12: GPT-6.1 Sol default context length was raised from 272,000 to 500,000 tokens.
- Day 8, Oct. 13: full reset.
- Day 9, Oct. 14: data stored on disk by the ChatGPT and Codex desktop apps was projected to fall by 60%.
- Day 10, Oct. 15: full reset.
Context length increase and desktop storage change
The Day 7 update lifted GPT-6.1 Sol’s default context length from 272,000 to 500,000 tokens, an increase of about 80%.
Sottiaux said that change would reduce how often long conversations need to be compressed. Users can still adjust the setting themselves, with the maximum reaching 1 million tokens.
The Day 9 change was described by Sottiaux as a 「Small ship」. According to the report, it came after heavy users said disk space had become a problem. The stated result was that data stored on disk by the ChatGPT and Codex desktop apps was expected to decline by 60%.
Banked reset versus full reset
On Day 3, when GPT-6 was rolled out to all ChatGPT users, paid accounts also received a banked reset.
According to PC Watch, a full reset immediately refills usage caps for everyone across the five-hour and weekly windows. A banked reset is stored in an account first, allowing the user to apply it later. The report said the Day 3 banked reset was issued to paid accounts as part of a milestone marking 40 million active users.
Where the challenge stands now
The 28-day plan, announced on Oct. 5 Taipei time, commits Sottiaux to posting either a noticeable improvement for most Codex and ChatGPT Work users or a full reset each day.
By Oct. 15, 10 days had been completed. Three of those days — Day 6, Day 8, and Day 10 — were reset days, while the others brought product changes.
