GPT-5 Is Imminent, OpenAI Rolls Out Opensource – Artificial Lawyer

OpenAI, the company that fired the starting gun for the wider genAI market with ChatGPT in November 2022, is imminently to launch GPT-5, its long-awaited new LLM that is expected to advance ‘the state of the art’.

Social media chatter has gone wild in the last 24 hours after OpenAI posted on X that they would be holding a special online briefing at 10AM Pacific Time, (6PM UK), followed by numerous commentators all stating that GPT-5 – the successor to the main GPT-4 model – will be announced at that event.

Of course, there may be some last-minute changes, given OpenAI’s mercurial nature. But, otherwise most of the tech world is expecting the ‘ball to drop’ today, or at most later this week. Either way, many expect far greater textual analytics capabilities, as well as big leaps forward in handling coding, from the new model.

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Opensource LLMs Built For Agents

Meanwhile, earlier this week OpenAI also launched two GPT-OSS offerings, describing the opensource systems as ‘advanced open-weight reasoning models to customize for any use case and run anywhere’.

That will be of interest to plenty of customers, including legal tech companies and law firm users who want to have a go at customising outputs. There is a 120b and a 20b version – the former can just about operate on a top-end lap top, and the smaller version can run on most laptops, they said.

Being able to run these models ‘on prem’ may also appeal to some users concerned about security.

They explained that these OSS models are:

‘Designed for agentic tasks – Leverage powerful instruction following and tool use within the chain-of-thought, including web search and Python code execution.

Deeply customizable – Adjust the reasoning effort to low, medium, or high. Plus, customize the models to adapt to your use case with full-parameter fine-tuning.

Full chain-of-thought – Access the full chain-of-thought for easier debugging and higher trust in model outputs.

Permissive license – These models are supported by the Apache 2.0 license. Build freely without worrying about copyleft restrictions or patent risk – whether you’re experimenting, customizing, or deploying commercially.’

See here for more on OSS.

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Overall, a major week for OpenAI and all those interested in what LLMs can do.

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Legal Innovators Conferences in New York and London – Both In November ’25

If you’d like to stay ahead of the legal AI curve….then come along to Legal Innovators New York, Nov 19 + 20, where the brightest minds will be sharing their insights on where we are now and where we are heading. 

And also, Legal Innovators UK – Nov 4 + 5 + 6

Both events, as always, are organised by the awesome Cosmonauts team! 

Please get in contact with them if you’d like to take part.