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AI news, Tuesday 22 September 2026

3 stories from AI Pulse, newest first.

Tuesday 22 September 2026

  1. LLMs & foundation models

    OpenAI's GPT-6 Sol and Luna halve API prices against the 5.6 models

    OpenAI released GPT-6 Sol and GPT-6 Luna on 22 September, minutes after Anthropic shipped Opus 5.5. Sol handles harder work like coding and costs $2 in and $10 out per million tokens. Luna is built for high-volume clerical jobs such as summarising and extraction, at $0.10 and $0.50. OpenAI says Sol makes about half as many factual mistakes as its predecessor. Its pitch is cost per completed task rather than raw benchmark scores, and for most business workloads that's the better measure.

    UK angle: Luna's pricing makes bulk summarising and extraction cheap enough to stop worrying about. Test it against whatever you're paying for now.

    TechCrunch (opens in a new tab)
  2. LLMs & foundation models

    Anthropic releases Claude Opus 5.5 at a lower price than Opus 5

    Anthropic launched Claude Opus 5.5 on 22 September, the first model in its Claude 5.5 family. It says Opus 5.5 matches Fable 5.1 on most work and costs 40% less to run than Opus 5 on typical workloads, with API pricing cut to $4 per million input tokens and $20 per million output. Output is more than 30% faster too. It's the company's first release since Dario Amodei called for pacing the frontier, and plenty of people have pointed at the gap between the essay and the launch. Anthropic's answer is that METR and Frontier Design evaluated the model before release. Sonnet 5.5 and Haiku 5.5 follow within weeks.

    UK angle: Teams building on Claude should redo their cost models. Opus-class work on typical workloads is now 40% cheaper.

    Anthropic (opens in a new tab)
  3. EU & global regulation

    China's regulator investigates DeepSeek and Moonshot over data sent to Claude

    The Cyberspace Administration of China has opened a probe into DeepSeek and Moonshot AI, The Information reported on 22 September. It follows Anthropic's claim that Moonshot routed more than 23 million exchanges to Claude between May and July, and DeepSeek more than 12.1 million over 14 days in July. Beijing wants to know whether sensitive user data left the country in breach of its transfer rules. The timing is bad for both, with DeepSeek mid-fundraise and Moonshot heading for a Hong Kong IPO.

    UK angle: Any AI tool built on a Chinese model deserves one question from UK buyers: where do my prompts go? This case shows the answer can be a third provider you never agreed to.

    Bloomberg (opens in a new tab)
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