Worked check: Carbon’s 59 on Index v5 is DeepMind’s report, and Carbon is not on the public API yet — door, price, and call-ability stay separate.

A frontier model here means the system the lab puts at the top of its own lineup. The useful facts are the date, who can call it, and the price or the tier. A rank without the test name and the measurer is an advertisement.

Argon is on the paid API, with a price that Google dates through November 30. Carbon is priced like Argon's introduction at $2 and $10, and DeepMind says it leads Intelligence Index v5 at 59, but it is not on the public API yet. Muse Wonder is callable now, and the Muse app is still on the previous model. GPT-6 can compose controls in ChatGPT, and Work and Codex did not move in that release. Those are different doors, not one leaderboard. The same class of model is now inside security research. Wiz says Gemini 4 Argon and GPT-5.6 Sol helped turn a decade-old PHP memory bug into a demonstrated remote exploit, published with the October 21 patches.

In this briefing

  1. A claimed ~14T Anthropic “numbat” checkpoint on Hugging Face has 43 tensors that match a name-seeded RNGNovember 1, 2026
  2. Gemini 4 Carbon is priced like Argon, and DeepMind says it leads the new index at 59October 28, 2026
  3. DeepMind shows Genie 4 to trusted testers, with Gemini 3.8 Flash steering the worldOctober 27, 2026
  4. GPT-6.1 Terra is $1 and $5 per million tokens, and OpenAI's coding score more than doublesOctober 26, 2026
  5. Anthropic filed a public S-1 and named the ticker ANTOctober 26, 2026
  6. Mirendil says one researcher pretrained a coding model for under $10 millionOctober 21, 2026
  7. PHP patches two critical bugs, and the working exploits came from AI-assisted researchOctober 21, 2026
  8. Anthropic opens a research preview of Claude Duet, a proactive agentOctober 21, 2026
  9. Gemini 4 Argon opens to developers at $2 per million input tokens until November 30October 13, 2026
  10. Meta releases Muse Wonder for agents that remember and keep goingOctober 12, 2026
  11. GPT-6 arrives in ChatGPT, and it can draw the screenOctober 7, 2026