Show HN: How Stale Is Your AI? Release age and training cutoff for 20 models

A recent analysis, "How Stale Is Your AI?", examines the release dates and training cutoffs for 20 AI models from various labs including Meta, Anthropic, Mistral AI, Google DeepMind, OpenAI, Alibaba, xAI, and DeepSeek. The data, checked on 2026-09-16, reveals models like Llama 4 released on Apr 5, 2025, with an Aug 2024 cutoff, and GPT-6 Astra released on Sep 3, 2026, with an Apr 30, 2026 cutoff. Several models, such as Mistral Large 3 and Muse Glimmer, have "Not established" training cutoffs.

This report is the only one to compile release dates and training cutoffs for 20 specific AI models, linking each data point to its original lab document.