AlphaSignal
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| Platform |  | Pricing | Only free issues | Publishes | Daily |
|---|---|---|---|---|---|
| Issues | 77 | Founded | 5 years ago | Last Issue | 8 days ago |
| Active | |||||
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alphasignalai.substack.comLatest Issues
How Anthropic's Jacobian Lens Reads What a Model Is About to Say
In ~6 mins: the one-matrix-per-layer lens Anthropic open-sourced, the few-dozen-concept “J-space” it reads, the swap test that flips a model’s answer, the eval-awareness ablation that turned a 0% blackmail rate into 7%, and how to...
The missing middleware: Why AI at scale requires model routers
Building a prototype with the strongest frontier model is easy. Scaling that prototype to process tens of millions of tokens is a fast track to API bankruptcy and latency bottlenecks.
The reality of modern AI engineering is that capable op...
GPT-5.6 Sol, Fable 5, Grok 4.5 and GLM 5.2 competed on the same math
In ~8 mins: the trap-filled prompt all four had to survive, the 2.667x defect hiding in the cheapest model, a 255x compute cut with a memory bill nobody prices, and who should actually care.
All live HTML demos are down below with gu...
GPT-5.6 Sol Aced Our Coding Test, the One That It Couldn't Cheat
In ~5 mins: a perfect run from a model METR just caught cheating, the hidden-test setup that makes it un-gameable, a 15x spread in cost per fix, why the two priciest models missed an easy bug, and who should actually switch.
GPT-5.6 Sol...
We Ran Grok 4.5 Against Sonnet 5 and GLM 5.2
In ~4 mins: a perfect launch-day score, the hidden-test setup behind it, the reasoning tax that split the field, a 3x gap in cost per fix, and who should actually switch.
Artificial Analysis!!
Grok 4.5 shipped on July 8 with interesting...
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The newsletter for AI developers. We help you stay up to date with the latest research, repos, and models.
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