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OpenAI's $1.3M API Bill Revealed by Austrian Developer

Peter Steinberger's project racks up massive OpenAI costs using Codex instances.

By Serhat Kalender·Editor-in-Chief·May 18, 2026·2 min read
Updated May 18, 2026
OpenAI's $1.3M API Bill Revealed by Austrian Developer
Image source: Golem

Wait, what? An Austrian developer just shared an OpenAI API bill for $1.3 million. Peter Steinberger, creator of the open-source project Openclaw, racked up that eye-popping tab over just 30 days. His team used about 100 Codex instances. Yeah, you read that right.

The Codex Powerhouse

So what did all that Codex do? Plenty. These AI agents handled GitHub pull requests, scanned for security bugs, even wrote fixes. They weren't just coding bots; they sat in on meetings. Generated code changes from the discussions. Pretty wild automation, right? But it came with a price tag.

Fast Mode Costs

That $1.3 million? It's mostly because of 'Fast Mode.' Steinberger says that feature burns through credits way faster than standard operation. Turn Fast Mode off, and the bill would've been closer to $300,000. Still a lot, but a massive difference. You want speed? You're gonna pay for it, apparently.

Fast Mode isn't just fast. It's fast at emptying your wallet, too.

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OpenAI's Role and Developer Costs

Good news for Steinberger, though: OpenAI picked up the tab. They're basically using Openclaw as a test lab for AI-driven development, no budget limits. For most developers, OpenAI says costs run $100-$200 a month. But that's just an average, depends on the AI model and how much automation you're doing.

Think of Openclaw as OpenAI's no-holds-barred AI experiment.

Context: European AI Innovations

This whole thing shines a light on Europe's AI scene. Developers there are leaning hard on advanced AI models — Codex, Claude Code, Cursor. They're expensive, sure, but crucial for pushing AI forward in the EU. A market that, let's be honest, often trails the US in tech funding and infrastructure.

What this means for you

So, what's the takeaway here for developers and tech companies? Steinberger's story is a pretty stark warning about advanced AI tools. Thinking of using something similar? You'd better get a handle on the financial side. Or maybe look into cheaper setups. Seriously.

What's still unclear

Still, some big questions hang out there. Will OpenAI tweak its pricing so these tools are actually affordable for most? How will Europe's tech community react to these sky-high bills? Any alternatives popping up?

Why this matters

An AI bill this big for Codex? It shows the real tension between powerful automation and keeping the lights on. AI's changing software development, no doubt. But understanding these cost dynamics? That's going to be a must-have for every developer and every company.

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#openai#codex#ai development#api costs#european tech
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