Models & Labs · Europe

Mistral says "Le Chonk" can challenge the best AI models

Credited to Ars Technica · arstechnica.com · 2h ago

Photograph · Ars Technica

Mistral says Le Chonk can rival top closed models while remaining open-weight.

As tensions mount over who gets access to top-end artificial intelligence, French company Mistral has released a new freely available model that it claims can compete with the very best from the US and China.

The new 1 trillion-parameter model, Mistral Large 4—nicknamed Le Chonk—can be used and customized by anyone. It’s currently available in preview, with a final version to follow by the end of the month. Though Le Chonk is built to compete with leading general-purpose models, it’s optimized specifically for coding and cyberdefense, as well as tasks particular to manufacturing, finance, electrical engineering, and other niches.

“There are a lot of areas where the other labs will not focus that much,” Guillaume Lample, cofounder and chief scientist at Mistral, tells WIRED. “There are so many domains in which you can improve models.”

Mistral presents Le Chonk as by far the most capable open-weight model developed outside of China, and “very, very close” to some proprietary models. Whereas Chinese labs have been accused by the US government of abusing distillation—the training of a smaller model on the outputs of a larger one—to close the performance gap with OpenAI and Anthropic, Mistral claims to have trained its model from scratch.

It’s already considerably cheaper for businesses to run open-weight models, which cost only as much as the compute they consume. By reducing the performance gap on leading proprietary models and providing a competitive alternative to releases from China, Mistral says, Le Chonk will eliminate the few remaining reasons a business might hesitate to choose open source.

“Mistral is still in the race of getting the best model,” Lample says. “This is the main message.”

With less capital and fewer compute resources than OpenAI and Anthropic, Mistral has generally lagged behind on model performance, revenue, and the frequency of releases. While the US labs charge a premium for access to their proprietary, closed-weight models, Mistral generates revenue by charging pay-as-you-go fees for running models through its cloud and deploying engineers to help customers tune models to their specific needs. Recently, however, the French lab has been on a hot streak: In September, it raised a $3.3 billion funding round at a $24 billion valuation, the largest ever raise by a European tech company. Its earnings have reportedly increased 20-fold in the last year or so.

The upswing for Mistral coincides with growing animosity between the US and its transatlantic allies—over issues ranging from tariff policy, to Greenland, to the policing of American tech firms—and an increasingly fractious debate over who gets access to frontier-grade AI.

In June, the Trump administration placed temporary restrictions on the distribution of models from OpenAI and Anthropic, citing concerns they could be abused to launch sophisticated cyberattacks. Since then, a litany of incidents have come to light where US-made models have broken free of their constraints and attacked companies and some foreign government institutions, leading to weeks of debate over how model releases should be regulated. The White House has reportedly asked the American labs to withhold unreleased models even from the UK’s AI Safety Institute, which had previously assisted in evaluating models for safety risks.

The stark reminder that the US government could unilaterally revoke access to frontier-grade AI has created an opening for Mistral, a Europe-based lab with open-weight models.

“The continental strategy of the EU to become more technologically sovereign … and the increased hostility of the US is a magic formula that all of a sudden puts Mistral—whose performance has not been spectacular—in a favorable position,” Andrea Renda, director of research at the Centre for European Policy Studies, told WIRED in July.

Reluctant to be pigeonholed into serving only its domestic market, Mistral is eager to emphasize that a lack of fine-grained control over access to AI models could be a problem wherever a business is located—even in the US. By relying on a proprietary model to help repel cyber threats, Lample says, a business risks the sudden collapse of its defenses.

“Sometimes, people like to [make a big deal] over the US, versus Europe, versus China. But what really matters is to own the model—even for US companies,” says Lample. “If you use a closed model, there is no guarantee it will still be there tomorrow.”

This story originally appeared on wired.com.

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Capital · Asia-Pacific

Firmus, CDC end planned $51B Australian AI buildout

Credited to Light Reading · lightreading.com · 2h ago

Photograph · Light Reading

CDC exits $51 billion AI data center project in Australia after its partner, Firmus, embarks on aggressive Asian expansion.

Nvidia-backed Australian data center alliance Project Southgate has broken up after just 12 months with a fraction of its planned 1.6GW buildout completed. CDC Data Centers has ended its partnership with Firmus – claimed to be worth as much as 73 billion Australian dollars (US$50.7 billion) – due to fears over Firmus' aggressive Asian expansion plans.

CDC CEO Greg Boorer told financial news site Rampart: "We're certainly not planning on doing 1.6GW of rollout with them because they made other choices regarding doing their own data center developments, which is slightly different to what we envisaged."

The partnership built just 42MW of data center capacity, all of it in a CDC facility in Melbourne.

Project Southgate was unveiled in October 2025 by Firmus, CDC and Nvidia as a planned rollout of Firmus' "AI factories" built on CDC data center infrastructure. It was intended to scale to 1.6GW by 2028, with Firmus claiming total investment could reach AU$73 billion ($50.7 billion).

Firmus Co-Chief Executive and Cofounder Oliver Curtis said the two partners had "mutually agreed earlier this year" to end their partnership, W.Media reported Tuesday.

He said the decision did not affect Firmus' current development plans. But it seems a string of major deals Firmus embarked on in the last four months, none of which has involved CDC, has administered the death blow to the CDC alliance.

These include a 360MW Nvidia-backed data center on Batam Island, Indonesia, as well as two sites in Malaysia for OpenAI, and another two sites in South Australia. Additionally, Firmus is partnering with Subco to build a new subsea cable from the Australian mainland to Tasmania.

The collapse of the giant project comes as Firmus, in a rare step, looks set to cut the price of its pending IPO because of risks over its mostly unbuilt data center capacity. Jun Bei Liu, portfolio manager at Ten Cap, criticized the company for an "unprecedented" lack of disclosure, ABC News reported.

Firmus had originally set the price at AU$A11 ($7.65), valuing the company at around AU$44 billion ($30.6 billion). But the IPO price is reportedly set to drop to AU$9 ($6.26) because of weak demand from investors.

Meanwhile, CDC’s valuation has declined, primarily due to higher interest costs following a series of rate rises in Australia this year. CDC is 49.7% owned by listed New Zealand and Australian infrastructure investor Infratil, which also owns New Zealand mobile operator OneNZ. Infratil says the latest independent valuation of its CDC stake declined by A$45 million ($31.3 million) in the third quarter from AU$9.21 billion ($6.4 billion) to A$9.17 billion ($6.37 billion).

Infratil's ASX stock declined 0.72% Wednesday.

About the Author

Robert Clark is an independent technology editor and researcher based in Hong Kong.

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