The clearest frame I've seen on this comes from these guys @midbrain_ai. Their point: the brain doesn't run one memory system. It runs three. – Episodic: what happened (raw traces) – Semantic: what it means (abstracted patterns) – Procedural: how I now behave (baked into the
AI
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Economic trade-offs in AI agent memory: retrieval vs. procedural
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Layer 3 is where the economics flip. Retrieval memory costs tokens on every call. The preference gets looked up, injected, re-reasoned — every time. Procedural memory costs zero tokens at inference. The behavior lives in the weights. The agent just acts correctly. At scale,
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ChatGPT Images 2.0 Autonomously Added Humorous Sign Text
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Important: it has been confirmed that ChatGPT Images 2.0 added the "Why are you like this" sign of its own accord
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GPT-5.5 Improves Codex Efficiency With Fewer Tokens
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GPT-5.5 uses significantly fewer tokens for the same Codex tasks. In general, you should expect better capability with fewer tokens vs GPT-5.4, not an increase!
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DeepSeek V4 Offers Cheapest Models Near Frontier Performance
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More of my notes on DeepSeek V4 – the really big news is the pricing: both DeepSeek-V4-Flash and DeepSeek-V4-Pro are the cheapest models in their categories while benchmarking close to the frontier models from other providers https://
simonwillison.net/2026/Apr/24/de
epseek-v4/
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DeepSeek launches V4 models on par with GPT-5.4
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DeepSeek released a set of new open-source models from the long-awaited V4 family that perform on par with GPT-5.4 and Opus 4.6. – DeepSeek-V4 Preview
– DeepSeek-V4-Pro
– DeepSeek-V4-Flash V4 models are available on APIs and DeepSeek Chat! Testing time -
Trustworthy AI software built through incremental development and careful review
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The people actually building software users trust with AI are doing it incrementally with heavy review at every step. That's not the story that gets posted because it sounds like normal engineering with a faster autocomplete.
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ChatGPT’s tone and vibe improved according to users
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is it just me does chatgpt's vibe feels better? Feels like the tone, the vibe changed a bit (for the better). But im not 100% certain.
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xhigh GPU settings excessive for most practical AI applications
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yah xhigh is overkill for almost all use cases.