AI Daily Dev — July 31, 2026

OpenAI Cuts GPT-5.6 Luna 80% After Sol Rewrites Its Own Inference Stack

Luna drops from $1/$6 to $0.20/$1.20 per million input/output tokens; Terra falls 20% to $2/$12.
Sol's price is unchanged, but a new Fast mode lands in the API with the same $5/$30 pricing.
OpenAI credits Sol itself for rewriting production GPU kernels in Triton and Gluon, cutting serving costs ~20%.
Cuts arrive three weeks after the GPT-5.6 launch; Sam Altman announced them on X as 'major price cuts today'.

models openai.com

Three-model suite: a Vision-Language-Action model, Embodied Reasoning (ER 2), and an on-device variant.
Coordinates feet-to-fingertips motion, chains hundreds of steps, and adapts to a new robot body in hours.
92% success unscrewing a light bulb; demos include tying delicate knots and multi-robot collaboration.
Demis Hassabis: robots 'can now reason through every movement to manage tasks that weren't possible before'.

research deepmind.google

1.5–2.0x transcription accuracy vs Deepgram Nova 3 and ElevenLabs Scribe v2 across 24 languages; gap widens to ~10x in noisy conditions.
60% fewer reasoning tokens than Think Fast 1.0 for the same conversational reliability.
Available now in the xAI API and Grok Voice Agent Builder beta.
Callers pinned to 'grok-voice-latest' auto-migrate on August 5.

models x.ai

CVE-2026-59726 ('RufRoot') exposes 233 tools — shell, DB ops, memory writes — via an unauthenticated MCP bridge open to the network by default.
Unauthenticated RCE, provider API key theft, and 'memory poisoning' that persists across patching.
Fixed in 3.16.3; Noma Labs disclosed June 30 with a working PoC and maintainers shipped a patch inside 24 hours.
Every version before 3.16.3 is affected — pin, upgrade, or lock the MCP bridge behind auth today.

tools thehackernews.com

Open-source Apache-2.0 CLI: HTTP proxy, browser exploitation, Python sandbox, CI/CD hooks.
Refuses to file a finding without a working proof-of-concept payload — no 'possible' bugs.
43.4k stars this week, hit #1 on GitHub Trending on July 3, adding ~10k stars per week.
v1.3.1 shipped with official GitHub Actions support for in-pipeline scans.

open-source github.com

Q2 revenue $60.8B, +28% YoY; EPS $6.18 missed the $7.17 consensus by nearly 14%.
Capex reached $31.1B in Q2 alone — 1.8x Q2 2025 — dragging free cash flow down 91% to $784M.
Full-year capex floor raised to $130–145B, up from $125–145B; announced a $10B+ BlackRock JV to build a data-center campus in El Paso, Texas.
Q3 revenue guide: $61–64B.

industry thenextweb.com