Dario says we should pace the frontier.
Anthropic, approximately 6 business days later:
> Opus 5.5 Sept 22
> Sonnet 5.5 Sept 28
> Haiku 5.5 coming next.
To be fair, “pace” is apparently doing a lot of work here 😂
Anthropic launched Opus 5.5 on Sept 22, then Sonnet 5.5 on Sept 28. Sonnet is 30%+ faster than Sonnet 5 and up to 30% cheaper for most workloads. Anthropic says Haiku 5.5 is coming in the next few weeks.
And today OpenAI has DevDay, so naturally everyone is waiting to see what gets thrown into the arena next. There are definitely multiple announcements/rumors floating around, but the official DevDay page is still keeping the details broad.
The funniest part of the AI industry right now is that everyone agrees we should slow down…and then someone ships a better model before lunch.
But underneath the memes, something important is happening:
Model cycles are getting absurdly short.
Opus 5 → Opus 5.5.
Sonnet 5 → Sonnet 5.5.
GPT-6 Astra → Sol/Luna → whatever comes next.
If your product strategy depends on one model staying ahead for even six months, good luck.
The real game is increasingly becoming: build above the models, not around one of them.
Models will keep changing.
The orchestration, context, verification and workflows around them are where things get interesting.
Welcome to “pacing the frontier” 😭