/Tech2h ago

Modal Labs is the only participant to complete the ComputeSDK 100k Scale Invitational benchmark for concurrent sandboxes

Modal routinely scales up to one million concurrent sandboxes.

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Erik Bernhardsson@bernhardsson#707inTech

Running 100k sandboxes is a hard scaling problem that's not for everyone – @modal is very excited to be one of a small set of providers that can handle this.

In fact, @modal was the only one to nail every single iteration of this test leading up to the final results.

ComputeSDK@computesdk

🚨 Benchmark Friday 🚨

After weeks of work from us and the participants, today we are excited to release the results of the 2026 100k Scale Invitational.

Over the next hour we'll be releasing each set of results.

Huge shoutout to @namespacelabs for powering our benchmarks!

12:42 PM · Jun 19, 2026 · 9.2K Views

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Users congratulated Modal on topping sandbox benchmarks and scaling to 1M instances, calling the results solid technical work.

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Erik Bernhardsson@bernhardsson

What's our secret? That this is business as usual for us, and has been for a long time.

We have many customers running 100k or even 1M sandboxes with us on a regular basis. Large RL runs for instance.

Looking forward to the 1M sandbox challenge – we are ready any time!

Erik Bernhardsson@bernhardsson

Running 100k sandboxes is a hard scaling problem that's not for everyone – @modal is very excited to be one of a small set of providers that can handle this.

In fact, @modal was the only one to nail every single iteration of this test leading up to the final results.

2h2.3K151

Charles 🎉 Frye@charles_irl

We're always scaling.

Erik Bernhardsson@bernhardsson

What's our secret? That this is business as usual for us, and has been for a long time.

We have many customers running 100k or even 1M sandboxes with us on a regular basis. Large RL runs for instance.

Looking forward to the 1M sandbox challenge – we are ready any time!

2h84280

Diptanu Choudhury@diptanu

@bernhardsson @modal Congrats! Solid work :)

2h231