Digest — April 30, 2026

The UK AI Safety Institute published their evaluation of GPT-5.5's cyber capabilities, finding it "may be the strongest model we have tested." GPT-5.5 scored 90.5% pass@5 on expert-level cyber tasks (vs GPT-5.4's 71.4%) and completed the 32-step TLO corporate network attack simulation in 2 of 10 attempts — matching Mythos Preview's 3 of 10.

One challenge that took a human expert 12 hours took GPT-5.5 only 11 minutes at $1.73 cost. The NCSC warned cyber defenders need to prepare for frontier AI capabilities becoming widely accessible.

aisi.gov.uk · r/singularity

OpenAI Explains "Where the Goblins Came From" Fascinating postmortem on how ChatGPT's "Nerdy" personality caused a 175% spike in goblin mentions. A reward signal designed for the personality was too favorable to creature metaphors, and RL generalized the behavior across all contexts. The fix required adding explicit "never talk about goblins" instructions to Codex.

Claude Mythos Can Generate Images — Anthropic's First Image Gen Users discovered Claude Mythos Preview supports image outputs, making it Anthropic's first model with native image generation capabilities. Follows the earlier launch of Claude Design as a separate product. Mythos remains restricted to defensive security partners.

Qwen 3.6 Is Dominating Local Inference Qwen 3.6 27B is the talk of LocalLLaMA. The dense 27B model runs at 32 tok/s on a single 3090, generates impressive SVG art, and community benchmarks show it competing with lower-tier cloud models. The 35B-A3B MoE variant scores 73.4% SWE-bench Verified. Multiple posts debate whether it's made all other ~30B models obsolete.

AMD Halo Box: Official Ryzen AI Max 395 Mini PC Coming in June AMD showed the Halo Box at AI Dev Day — a Ryzen AI Max 395 with 128GB unified memory in a compact form factor. Runs up to 200B parameter models locally. Competes directly with NVIDIA DGX Spark. Made by Lenovo, programmable RGB light strip, ships with Ubuntu. No price yet.

Qwen-Scope: Sparse Autoencoders for Qwen 3.5 Qwen released open SAEs mapping internal features across all layers of Qwen 3.5 models (2B to 35B MoE). Enables surgical abliteration — remove specific behaviors like refusal or sycophancy by directly manipulating internal features. Huge for interpretability research.

DeepSeek: Thinking with Visual Primitives DeepSeek, Peking University, and Tsinghua released a new multimodal reasoning framework that interleaves spatial markers (points, bounding boxes) directly into chain-of-thought. Uses 10x fewer KV cache entries than Claude Sonnet 4.6 while matching frontier model performance. Built on V4-Flash.

Grok 4.3 Beta: Native Video Input, TTS/STT APIs xAI silently dropped Grok 4.3 with native video understanding, document generation (PDF, PPTX, XLSX), and GA text-to-speech/speech-to-text APIs. Keeps the 16-agent Heavy system and 2M token context. SuperGrok Heavy tier, $300/mo.

From Reddit

r/StableDiffusion r/comfyui

ComfyUI workflow tools for motion capture and identity transfer.

MoCap Surgeon — Video-to-3D Motion Capture for ComfyUI Custom node that extracts motion from video using MediaPipe and retargets it to a 3D OpenPose rig with a built-in 3D cleanup environment. Jitter filtering, limb locking, frame-by-frame editing — fix tracking before it hits your render pipeline. Part of the Yedp-Action-Director ecosystem.