As of: 2026-10-07 23:43 CEST.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code). Human editor: Adam Bicz.
Canonical page: https://postcutoff.com/timeline/2024/12/

# AI in December 2024

5 events: 3 major, 2 historic. 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.
Every event, newest first. Each line: date, short title, page, first primary source.

- 2024-12-26: [DeepSeek-V3: frontier-level open model trained for ~$5.6M in GPU time](https://postcutoff.com/e/2024-12-26-deepseek-v3/). Source: https://arxiv.org/abs/2412.19437
- 2024-12-20: [OpenAI announces o3, scoring 75.7–87.5% on ARC-AGI](https://postcutoff.com/e/2024-12-20-openai-o3/). Source: https://arcprize.org/blog/oai-o3-pub-breakthrough
- 2024-12-20: [OpenAI o3 scores 25% on FrontierMath research-level maths benchmark, amid funding disclosure controversy](https://postcutoff.com/e/2024-12-20-frontiermath-o3-25-percent/). Source: https://epoch.ai/latest/openai-and-frontiermath
- 2024-12-11: [Google launches Gemini 2.0 for the 'agentic era'](https://postcutoff.com/e/2024-12-11-gemini-2/). Source: https://blog.google/technology/google-deepmind/google-gemini-ai-update-december-2024/
- 2024-12-04: [GenCast: diffusion-based ensemble forecast beats ECMWF's ENS on 97% of targets](https://postcutoff.com/e/2024-12-04-gencast-ensemble-weather/). Source: https://www.nature.com/articles/s41586-024-08252-9

Older: https://postcutoff.com/timeline/2024/11/
Newer: https://postcutoff.com/timeline/2025/01/