Anthropic's S-1 shows $41M in revenue in 2023, the year GPT-4 came out. In just the first half of 2026, its revenue was $16.29B, nearly 400x more. Simile CEO Joon Sung Park (@joon_s_pk) says AI simulation right now is in its GPT-4 era: "Simulation is basically in its GPT-4, GPT-4.5 era, where the technology's here to make an impact." “I see the simulation space as one that’s going to reach its maturity to a point where, in about 1.5-2 years, it will be where coding agents as an industry are…