| 1. Claude Fable 5 (High) |
| 2. Claude Opus 5 (Max) |
| 3. Claude Opus 5 (High) |
| 4. GPT 5.6 Sol (xHigh) |
| 5. Kimi K3 (Max) |
The BriefMore than 1,200 of the people who actually build frontier AI, meaning the largest and most capable models, signed a public statement called Pacing the Frontier. It asks the US government to help create international tools that could deliberately slow down AI that writes and improves its own code. They are not asking for a pause now. They are asking that the ability to pause exist later, in case the technology starts moving faster than the people building it can follow. The signature list is the part that makes this different from the open letters you have seen before: Anthropic's CEO, OpenAI's chief scientist and chief research officer, Google DeepMind's co-founder, and Meta AI's chief scientist all put their own names on it, and both OpenAI and Anthropic backed it as companies within hours of publication.
Level UpStop using one model for everything. This week, take the three AI tasks you run most and split them: let your most expensive model do the planning and the judgment calls, and route the repetitive execution to a cheap fast tier. Google's newest Flash release is the clearest illustration of why the math changed, it does more per token and costs about 17 percent less on output than the version it replaces. The gap between good enough to execute and frontier quality is now mostly a budget decision rather than a capability one. Write down what each of your tasks actually needs before you pay frontier prices for all of it. What Google's new Flash tier costs