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Claude Opus 5.5 tops the Intelligence Index on September 22, 2026
On September 22, 2026, Artificial Analysis scored Claude Opus 5.5 at 58 on its Intelligence Index at max effort.
Mistral OCR 4.0 retired with Leanstral 1.5 on September 30, 2026
Mistral AI deprecated OCR 4.0 and the experimental Leanstral 1.5 on September 29, 2026 and retired both the next day.
Grok Voice Transcribe 1.0 retired on October 2, 2026: calls move to 2.0
xAI's speech-to-text model grok-voice-transcribe-1.0 reached end of life on October 2, 2026.
ARC Prize publishes GPT-6 Astra ARC-AGI-3 results on September 3, 2026
On September 3, 2026, ARC Prize reported GPT-6 Astra at 62.7% on ARC-AGI-3 Semi-Private with its Standard harness.
Claude Fable 5.1 and Mythos 5.1 release on September 1, 2026
Claude Fable 5.1 release: Anthropic shipped Fable 5.1 and Mythos 5.1, one model with two safeguard levels, on Sep 1.
OpenAI and Synopsys announce GPT-Synopsys for chip design, Sep 30, 2026
OpenAI and Synopsys agreed on September 30, 2026 to build GPT-Synopsys, a model that runs Synopsys chip design tools.
OpenAI model deprecations, October 1, 2026: GPT-5.1, Codex and TTS
OpenAI model deprecations on October 1, 2026 cover GPT-5.3-Codex, GPT-5.1, GPT-5.4-Nano and three TTS models.
OpenAI GPT-6 Astra release on September 3, 2026: what's new
GPT-6 Astra release: OpenAI shipped its most capable model on September 3, 2026, with a Critical cybersecurity rating.
AI news September 2026: models, chips and data centers
AI news for September 2026: GPT-6 Astra, Claude Opus 5.5 and Gemini 4 Argon, plus chip roadmaps and power deals.
AI news August 2026: models, chips and data centers
AI news for August 2026: a Google DeepMind leadership change, OpenAI's 8 GW PORTS-Pike deal and Nvidia's Q2 results.
AI news July 2026: models, chips and data centers
AI news for July 2026: GPT-5.6, AMD's Instinct MI400 Series, Claude Opus 5 and new gigawatt-scale campuses.
OpenAI DevDay 2026, September 29: GPT-6.1 Sol, Dots and Agents API
OpenAI DevDay 2026 on September 29 brought GPT-6.1 Sol, always-on Dots agents and an Agents API with Computer Use.
OpenAI releases GPT-6 Sol and GPT-6 Luna on September 22, 2026
OpenAI released GPT-6 Sol and GPT-6 Luna on September 22, 2026 in ChatGPT Work, Codex and the API.
OpenAI disrupts Moonshot AI-linked distillation campaign, Sep 30, 2026
On September 30, 2026, OpenAI said it disrupted a distillation campaign and tied a core cluster to Moonshot AI.
OpenAI outlines safety cases for frontier AI training on Sept 28, 2026
On September 28, 2026, OpenAI said frontier AI training runs should need a written safety case before they continue.
Anthropic Claude Opus 5.5 release on September 22, 2026: what's new
Claude Opus 5.5 release: Anthropic shipped the model on September 22, 2026, at Fable 5.1 level on most work.
Anthropic Claude Sonnet 5.5 release on September 28, 2026: what's new
Claude Sonnet 5.5 release: Anthropic shipped the first Sonnet with cyber safeguards on September 28, 2026.
Google Gemini 4 Argon release on September 30, 2026: what's new
Gemini 4 Argon release: Google shipped it on September 30, 2026 to cyber defenders first, with a 1M-token output limit.