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AI Daily Brief — 30 September 2025

Month-end packed five landmark stories. OpenAI launched Sora 2 plus a standalone invite-only iOS social app — synchronized dialogue and SFX, sharper physics (basketball rebounds off the backboard), multi-shot consistency, and a “cameos” feature dropping verified users into any scene. Z.ai released GLM-4.6 (355B MoE, MIT, 200K context) at near-parity with Claude Sonnet 4 on multi-turn coding. Ant Group open-sourced Ring-1T-preview, the world’s first trillion-parameter reasoning model, scoring 92.6 on AIME-25 and 94.69 on Codeforces (Ant claims that beats GPT-5). Meta Ray-Ban Display hit US retail at $799 (with Neural Band EMG wristband), monocular 600×600 in-lens display, sold out in 48 hours. Crusoe’s Abilene Stargate campus officially went live serving Oracle/OpenAI, and Cerebras Systems closed a $1.1B Series G at $8.1B.

Top stories

  • OpenAI launches Sora 2 + social app. Invite-only iOS social app (TikTok-style feed of AI-generated video), synced dialogue/SFX, sharper physics, multi-shot consistency, “cameos” feature dropping verified users into scenes via short identity capture. US + Canada rollout. via OpenAI
  • Z.ai ships GLM-4.6. 355B-parameter MoE under MIT, targeting agentic coding. Input window raised to 200K, 128K max output. On CC-Bench multi-turn coding: 48.6% win rate vs Claude Sonnet 4 using ~15% fewer tokens than GLM-4.5. Integrated with Claude Code, Cline, Roo Code, Kilo Code. via Z.ai
  • Ant Group open-sources Ring-1T-preview. First trillion-parameter open reasoning model, built on Ling 2.0. AIME-25: 92.6 (top among open). Codeforces: 94.69 (Ant claims surpasses GPT-5). First place open-source on LiveCodeBench and ARC-AGI-v1. via TechNode
  • Meta Ray-Ban Display ships at $799. Best Buy, LensCrafters, Sunglass Hut, Ray-Ban stores. Monocular 600×600 in right lens, 20° FOV, 30-5000 nits, 90Hz. Neural Band EMG wristband included. Black + Sand. Sold out in 48 hours; international launch subsequently delayed. via Meta
  • Crusoe Abilene Stargate campus officially live. First-phase 980,000 sq ft / 200MW+ IT load serving Oracle Cloud Infrastructure for OpenAI workloads. NVIDIA GB200 racks delivered since June. Full campus target: ~4M sq ft / 1.2GW across 8 buildings by mid-2026. via Crusoe
  • Cerebras closes $1.1B Series G at $8.1B. Co-led by Fidelity and Atreides Management, positioning wafer-scale CS-series chips as the NVIDIA alternative for large-model inference and training. via TechFundingNews
  • Claude Sonnet 4.5 rolls into Vertex AI + GitHub Copilot preview. One day after the Sep 29 launch, Sonnet 4.5 landed on Google Cloud Vertex AI and entered public preview for GitHub Copilot — leading OSWorld at 61.4%, SOTA on SWE-bench Verified, sustained 30+ hour focus, unchanged $3/$15 per Mtoken. via Google Cloud

Who shipped

OpenAI shipped Sora 2 + Sora social app. Z.ai shipped GLM-4.6. Ant Group open-sourced Ring-1T-preview. Meta shipped Ray-Ban Display at retail. Crusoe brought Abilene online. Google updated Imagen virtual try-on. Cerebras closed mega-round.

Open-source pulse

Chinese open-source dominated. Z.ai GLM-4.6 (MIT, 355B MoE) and Ant Ring-1T-preview (1T-parameter reasoning model) landed same day — the largest open-weight reasoning model ever released. DeepSeek V3.2-Exp from Sep 29 with Sparse Attention continued to roll through the community as the inference-cost story.

Money, infra & hardware

Cerebras’s $1.1B at $8.1B is the day’s structural funding event. Crusoe Abilene’s go-live concrete-evidences the Stargate buildout — Oracle GB200 racks serving OpenAI workloads at 200MW+ today, on track for 1.2GW by mid-2026. Meta Ray-Ban Display retail launch reframes consumer AI hardware: $799 inclusive price with EMG wristband, sold out in 48 hours.

Quiet corners

Anthropic publicly committed during September to halting sales to majority-Chinese/Russian/Iranian/N. Korean-owned entities — one of the more explicit export-stance moves among frontier labs. No standout arXiv breakouts beyond Sonnet 4.5’s system card from the day prior.

By the numbers

  • 1T — Ring-1T-preview parameters (first open trillion reasoning model)
  • 200K / 128K — GLM-4.6 input / output context
  • $799 — Meta Ray-Ban Display retail (with Neural Band)
  • $1.1B / $8.1B — Cerebras Series G size / post-money
  • 200MW+ — Crusoe Abilene first-phase IT load now live
  • 48 hours — how long Ray-Ban Display stock lasted
  • Most-mentioned company: OpenAI
  • Quietest segment: EU AI Act

Compiled by AI Feed’s editor from verified web sources for 30 September 2025.