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AI Daily Brief — 6 September 2025

A China-dominated weekend Saturday. Moonshot shipped Kimi K2-0905. Zhipu/Z.ai targeted displaced Claude users. DeepSeek’s rate-card flipped. Anthropic’s Friday China ban drove weekend follow-through.

Top stories

  • Moonshot AI releases Kimi K2-Instruct-0905 (open weights). Incremental update to trillion-parameter MoE. Context expanded 128K → 256K. 384 experts with 32B activated per token. Sharper agentic-coding scores; noticeably better front-end code. New high-speed API at 60-100 tok/sec. Released prior evening Beijing time, spread across English AI-dev channels Saturday. via Simon Willison
  • Moonshot pitches K2-0905 as Claude Sonnet 4 alternative for Chinese devs. Reporting framed K2-0905 as direct response to Anthropic’s day-old China cutoff. Pitched coding capabilities “matching Claude Sonnet 4”. API as drop-in for displaced Claude users in China. via AIbase
  • Zhipu (Z.ai) opens “Special Migration Plan” for Claude API users to GLM-4.5. Ports Claude API users to GLM-4.5 by swapping base URL (Anthropic-protocol compatible). Package: 20M free tokens for new users, developer coding plan billed at roughly 1/7th of Claude’s price with 3x usage, 1:1 technical support. Reuters wire pickups, English startup press through Sep 6. via Startup Wired
  • Weekend coverage of Anthropic’s China-controlled-firm ban. Friday Sep 5 policy update barring service to any entity >50% owned by parties in “unsupported regions” drove news cycle through Saturday. Focused on Beijing’s irony-soaked social-media reaction, FT-confirmed “low hundreds of millions” revenue hit, downstream effects in Gulf where Chinese-linked subsidiaries also lose access. SCMP framed practical impact as unlikely to “move the needle” on Chinese AI capability. via SCMP
  • DeepSeek API pricing reset takes hold. Aug 21 announcement (with V3.1 release) ended off-peak/nighttime discounts and rebased API rate card effective Sep 5, 16:00 UTC. Sep 6 was first full day on unified rate: V3.1 Chat at ~$0.21/MTok input, $0.79/MTok output. Output costs effectively up >50% vs prior off-peak floor. via DeepSeek

Who shipped

Moonshot shipped K2-0905. Zhipu shipped migration plan. DeepSeek shipped a price reset.

Open-source pulse

Bartz v. Anthropic $1.5B settlement enters preliminary-approval window — Friday Sep 5 was court-set deadline for filing motion for preliminary approval covering ~500K pirated works. Weekend legal-press writeups walked authors through ~$3,000-per-work payout, claim mechanics, fact that deal does NOT license future Anthropic use. via Norton Rose Fulbright

Money, infra & hardware

Anthropic’s China ban triggers backlash among China-research staff — at least one internal departure (researcher who quit over hardening anti-China stance) and revived debate about US AI companies setting de-facto foreign policy. via ChinaTalk

Quiet corners

Quiet on US frontier-lab front: no OpenAI / Google DeepMind / Meta releases dated Sep 6. September’s flagship US moments (Sora 2, Claude Sonnet 4.5, Stargate “5 new sites”, ChatGPT Pulse, Gemini Robotics 1.5) all came later in month. Day’s narrative belonged to China and to weekend follow-through on Friday’s Anthropic news.

By the numbers

  • 1T / 256K / 384 / 32B — K2-0905 params / context / experts / active
  • 60-100 tok/sec — K2-0905 high-speed API throughput
  • 20M / ~1/7 — Zhipu free tokens / Claude pricing ratio
  • ~$0.21 / $0.79 — DeepSeek V3.1 Chat per MTok input/output
  • 50% — Anthropic China-ban ownership threshold

Compiled by AI Feed’s editor from verified web sources for 6 September 2025.