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OpenAI Opens 88,500-Square-Foot London Office For 500 Employees

OpenAI Expands London Presence With New Office

OpenAI opened its first permanent office in London, expanding its international operations. The site spans 88,500 square feet in King’s Cross and is designed to accommodate more than 500 employees. The expansion follows a decision to pause a planned U.K. infrastructure project, according to CNBC.

Strategic Investment In London

OpenAI plans to scale its London operations as a key research center outside the United States. The company currently employs около 200 staff in the city, with hiring expected to increase. Phoebe Thacker, London Site Lead at OpenAI, said the U.K. offers a strong talent base and an established AI research ecosystem. The new office is intended to support continued team growth.

Navigating U.K. Energy And Regulatory Challenges

The expansion comes alongside a pause in OpenAI’s U.K. Stargate project, linked to high industrial energy costs and regulatory constraints. Discussions with project partner Nscale are ongoing. Industry observers note that industrial energy prices in the U.K. remain among the highest globally, affecting the economics of large-scale AI infrastructure.

The U.K.’s Ambitious AI Strategy

The U.K. government launched its AI Opportunities Action Plan in early 2025, contributing to increased investment activity. Venture funding in the sector reached $6.7 billion during the year. Recent deals include $2 billion raised by Nscale, $1.2 billion by Wayve, and $500 million by ElevenLabs. These investments reflect continued interest in AI infrastructure, autonomous systems, and voice technologies.

OpenAI Brings Unlimited Text Chats To Free ChatGPT Users

Unlimited Text Conversations Roll Out

OpenAI is removing limits on text-based conversations for all ChatGPT users, following the platform’s recent milestone of surpassing one billion weekly users.

The update introduces GPT-5.6 Luna as the default model for Free and Go users, replacing GPT-5.5.

New “Think” Button For More Complex Questions

Alongside unlimited text chats, Free and Go users will gain access to a new “Think” button, allowing them to use additional reasoning power for more complex queries.

OpenAI noted that separate usage limits will continue to apply to file uploads, image generation, voice features and other multimodal tools.

Faster Responses For Paid Subscribers

The update also brings improvements for ChatGPT Plus and Pro subscribers. They will receive access to GPT-5.6 Sol, an upgraded model designed for everyday tasks such as web research, planning, writing, decision-making and answering questions. According to OpenAI, the model delivers shorter, more robust responses.

The company noted that this version is separate from the GPT-5.6 Sol model used in Codex and Work, which remains unchanged. Plus and Pro subscribers will also receive a new thinking slider, allowing them to adjust how much reasoning the model applies before generating an answer, depending on the complexity of the task.

OpenAI Reports Fewer Errors

According to OpenAI’s internal testing, GPT-5.6 Luna produces 62% fewer factual errors than GPT-5.5 Instant, while GPT-5.6 Sol reduces factual errors by 68%.

The updated GPT-5.6 Sol model is available to Plus and Pro users starting today. The remaining features for Free and Go users will roll out throughout the week, with unlimited text chats and the new Think button becoming available next week.

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