Models
Anthropic releases Claude Opus 5.5 at lower cost
Matches Fable 5.1 on most work at about 40% lower run cost, with stronger alignment scores and clearer writing. Available on Claude, the API, AWS, Google Cloud and Azure.
AI news
Thursday, 24 September 2026
Language
Google ships Gemini 3.8 Flash and Flash-Lite text-to-speech
The models design voices from a prompt across more than 100 languages and can clone a consented 30-second sample. They are live in the Gemini API and AI Studio; voice replication is not available in the UK or EEA.
Security
OpenAI gives Ukraine free access to Daybreak cyber defence
Ukrainian teams will use the programme to find vulnerabilities and test fixes on civilian infrastructure such as hospitals and power plants. The deal includes GPT-5.6 Sol and was announced on the sidelines of the UN General Assembly.
Policy
OpenAI sets principles for third-party AI safety assessments
The company commits to independent assessors across training, evaluation and deployment, with deeper access to safety cases and safeguards. Named partners and access terms are still to follow.
Models
OpenAI ships GPT-6 Sol and Luna at half prior API prices
Sol targets coding and agent workflows; Luna targets high-volume clerical tasks. Both inherit Astra alignment and communication style, and are live in the API, ChatGPT Work and Codex.
Policy
UK PM puts frontier AI at the heart of the 2027 G20
In his UN General Assembly speech Andy Burnham pledged a single set of global AI principles and said new laws are on the table if needed. He also tasked security chiefs to set up a National Centre for Information Defence against AI-amplified disinformation.