Why AI model releases feel nonstop

Another day, another frontier AI model announcement—actually two of them, one from Anthropic and one from OpenAI. It feels like new model releases are accelerating, and they are, but many of the new releases are models that repackage (and often reprice) the capabilities of earlier flagship models. Both of Tuesday’s releases are examples. OpenAI announced GPT-6 Sol and GPT-6 Luna—faster, more affordable models that bring the advances behind its flagship GPT-6 Astra “to everyday work.” Anthropic announced Claude Opus 5.5, which it says matches the performance of its flagship Claude Fable 5.1 model on most work and costs around 40% less to run than its predecessor, Claude Opus 5. (On Monday, SpaceXAI launched its Grok 4.7 model, which the company says excels at coding and knowledge work and can run longer tasks and verify its outputs. But Grok 4.7 is a legitimately new flagship model with new performance and capabilities, not an optimized version of an earlier model.) Anthropic’s release cadence for frontier models has roughly doubled during 2026, from a model every 46 days in the first half to every 26 days so far in the second; OpenAI’s release cadence has increased from every 46 d…