{"schema":"postcutoff/timeline-list@1","as_of":"2026-10-07T23:43:00+02:00","url":"https://postcutoff.com/timeline/2024/12/","md":"https://postcutoff.com/timeline/2024/12/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"Adam Bicz","policy":"https://postcutoff.com/about/"},"license":null,"period":{"year":"2024","month":"2024-12"},"counts":{"all":5,"major":3,"historic":2},"coverage":"Researched afterwards, not logged live, so this count is a floor, not a complete record. Our agents began logging news as it happened on 29 September 2026.","events":[{"id":"2024-12-26-deepseek-v3","url":"https://postcutoff.com/e/2024-12-26-deepseek-v3/","date":"2024-12-26","date_precision":"day","short_title":"DeepSeek-V3: frontier-level open model trained for ~$5.6M in GPU time","deck":null,"takeaway":"Upended assumptions about the cost of frontier AI and China's position; it was the base for DeepSeek-R1 weeks later.","category":"open-source","category_label":"Open source","importance":5,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":2,"official":2,"filed":"2026-09-29","updated":"2026-09-29","orgs":["DeepSeek"]},{"id":"2024-12-20-openai-o3","url":"https://postcutoff.com/e/2024-12-20-openai-o3/","date":"2024-12-20","date_precision":"day","short_title":"OpenAI announces o3, scoring 75.7–87.5% on ARC-AGI","deck":null,"takeaway":"Convinced many observers that reasoning models were on a steep trajectory; ARC Prize called it a genuine step-change.","category":"benchmark","category_label":"Benchmarks","importance":5,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":2,"official":2,"filed":"2026-09-29","updated":"2026-09-29","orgs":["OpenAI","ARC Prize"]},{"id":"2024-12-20-frontiermath-o3-25-percent","url":"https://postcutoff.com/e/2024-12-20-frontiermath-o3-25-percent/","date":"2024-12-20","date_precision":"day","short_title":"OpenAI o3 scores 25% on FrontierMath research-level maths benchmark, amid funding disclosure controversy","deck":null,"takeaway":"It was the first sign that research-level maths was yielding to reasoning models, and an early lesson in benchmark governance and conflicts of interest.","category":"science","category_label":"Science & math","importance":3,"confidence":"high","status":{"key":"disputed","labels":["Disputed"]},"sources":3,"official":1,"filed":"2026-09-29","updated":"2026-09-29","orgs":["OpenAI","Epoch AI"]},{"id":"2024-12-11-gemini-2","url":"https://postcutoff.com/e/2024-12-11-gemini-2/","date":"2024-12-11","date_precision":"day","short_title":"Google launches Gemini 2.0 for the 'agentic era'","deck":null,"takeaway":"Marked Google's return to competitive parity and the industry's pivot to agents.","category":"model-release","category_label":"Model releases","importance":4,"confidence":"high","status":{"key":"confirmed","labels":["Confirmed"]},"sources":2,"official":1,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Google DeepMind"]},{"id":"2024-12-04-gencast-ensemble-weather","url":"https://postcutoff.com/e/2024-12-04-gencast-ensemble-weather/","date":"2024-12-04","date_precision":"day","short_title":"GenCast: diffusion-based ensemble forecast beats ECMWF's ENS on 97% of targets","deck":null,"takeaway":"GenCast (Nature, Dec 2024) is a diffusion model producing probabilistic 15-day ensemble forecasts.","category":"science","category_label":"Science & math","importance":3,"confidence":"high","status":{"key":"confirmed","labels":["Result confirmed"]},"sources":2,"official":2,"filed":"2026-09-29","updated":"2026-09-29","orgs":["Google DeepMind"]}],"older":"https://postcutoff.com/timeline/2024/11/","newer":"https://postcutoff.com/timeline/2025/01/"}