I'll confess that my model of the state of the AI race isn't very good, and I'm looking to improve it. Anthropic seems to have a commanding lead, with its flagship model, Claude Opus 4.8, generally outpacing competing models by a significant margin and two more secretive models not appearing to have counterparts at competing companies.

China seems to consistently be a few months to a year behind the American companies' most recent models, and the American frontier companies tend to be 1-3 months behind the leader at any given time, but I haven't seen something like Mythos/Fable before, so I'm having a hard time figuring out what it means for the industry. Is its success just a matter of scale, such that OpenAI, Google, or XAI could invest in a much larger model and see similar results, or is there some combination of proprietary knowledge and employee experience at Anthropic that can't be easily replicated?

I know XAI is a bet on horizontal integration with Twitter (as a source of data) and Tesla (as an applications department that can more directly coordinate with AI researchers), so maybe they aren't excessively concerned. What about OpenAI? They used to have an identity as the consumer-facing AI company, but Anthropic might well have already closed the gap there.