OpenAI announced on October 7 that GPT-6 is officially entering ChatGPT: paid users get GPT-6 Sol first, free and Go users get GPT-6 Luna in batches from October 8. The simultaneously launched Intelligent UI puts charts, buttons, and interactive widgets directly in answers — output is no longer text-only.
Bloomberg reported on October 6 that DeepSeek's new funding round is nearing close at at least ¥80 billion (~$12 billion). Tencent Holdings and CATL are the round's largest investors. The round started targeting just ¥50B and kept growing as subscriptions overshot expectations.
Nvidia-backed Reflection AI released its first open-weight model Beam on October 5: 501B total parameters with only 23B active per token, 1M-token context. The company claims reasoning performance close to Zhipu's GLM-5.2 at one-quarter to one-third the inference compute, with weights coming later in October under Apache 2.0.
David Robinson of OpenAI's safety systems team resigned and published a long essay in The Atlantic, criticizing the company's "trial-and-error" deployment culture as destined to fail. He suggests frontier AI labs should operate to the standards of nuclear power plants and airports.
This morning, developers noticed Claude's web app had quietly been graduated to Anthropic's next-gen flagship. The UI still says "Fable 5.1," but the one answering questions has changed. Anthropic hasn't officially announced it.
Anthropic has released the second model in the Claude 5.5 series, Sonnet 5.5. It responds over 30% faster than its predecessor, keeps API prices unchanged, and jumped from 10.3% to 70.6% on the Terminal-Bench 4.0 coding benchmark. Anthropic claims it 'clearly outperforms' OpenAI's GPT-6 Sol on long-horizon knowledge work.
Anthropic has filed an S-1 with the US SEC, disclosing nearly $4.6 billion in 2025 revenue and a $42 billion net loss, alongside plans to spend $518 billion on compute over the coming years. Meanwhile the prospectus unusually warns that the advanced AI it develops could bring 'catastrophic or even existential risk' to humanity.
Anthropic launched Opus 5.5 on September 22, the first model in the Claude 5.5 series: near-flagship performance on most tasks at ~40% lower running cost, aimed at agentic coding and knowledge work. Plugins and a Marketplace launched alongside.