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OpenAI’s record-breaking test score might have cost $30,000 per puzzle

In December, OpenAI CEO Sam Altman announced that its new o3 “reasoning” model had, for the first time, achieved a winning score on the ARC-AGI benchmark, a notoriously difficult test that had stumped all prior AI models.

But that power came at a steep price. The ARC Foundation (which maintains the test) estimated that the price for the “high compute” configuration of the winning test was about $3,400 per puzzle.

But OpenAI has not yet released the computing costs of its winning tests.

Last week, the ARC Foundation updated its leaderboard of test results, and o3’s winning score was no longer on the chart:

“Only systems which required less than $10,000 to run are shown. Notably missing from this chart is o3 (high compute). For more information on this see our announcement blog post.”

The ARC Foundation thinks the actual o3 costs are more in line with the superexpensive o1-pro model, which is the most expensive in the industry. Based on the sky-high pricing of the o1-pro model, that means it may have cost up to $30,000 of computation to solve each puzzle. The ARC Foundation wrote:

“o3 pricing costs have been updated to use o1-pro pricing. We will update again once official o3 pricing is publicly available. The amount of compute was roughly 172x the low-compute configuration.”

OpenAI did not immediately respond to a request for comment.

But that power came at a steep price. The ARC Foundation (which maintains the test) estimated that the price for the “high compute” configuration of the winning test was about $3,400 per puzzle.

But OpenAI has not yet released the computing costs of its winning tests.

Last week, the ARC Foundation updated its leaderboard of test results, and o3’s winning score was no longer on the chart:

“Only systems which required less than $10,000 to run are shown. Notably missing from this chart is o3 (high compute). For more information on this see our announcement blog post.”

The ARC Foundation thinks the actual o3 costs are more in line with the superexpensive o1-pro model, which is the most expensive in the industry. Based on the sky-high pricing of the o1-pro model, that means it may have cost up to $30,000 of computation to solve each puzzle. The ARC Foundation wrote:

“o3 pricing costs have been updated to use o1-pro pricing. We will update again once official o3 pricing is publicly available. The amount of compute was roughly 172x the low-compute configuration.”

OpenAI did not immediately respond to a request for comment.

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Last week, the company released to the public its much-anticipated Claude Fable 5 model (and its restricted version Claude Mythos 5, which is still being tested with trusted partners). Anthropic said in a blog post announcing the action that officials cited national security concerns with the new models, while offering few specific details.

The post said that the government gave the company “verbal evidence of a potential narrow, non-universal jailbreak” of the public Fable 5 model. A jailbreak is a means by which users can evade restrictions built into the code to unlock prohibited functionality. Anthropic downplayed the significance of the attack, and said other major models, such as OpenAI’s GPT-5.5, could also be affected by the technique described.

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This morning, Axios reported that Anthropic technical staff have flown to Washington to meet with White House officials to resolve the issue.

The Wall Street Journal is reporting that the Trump administration’s decision to take action against Anthropic was prompted by discussions that Amazon CEO Andy Jassy had with officials, including Treasury Secretary Scott Bessent. According to the report, Amazon researchers said they had been able to evade some of Fable 5’s security restrictions using specific prompts. Amazon is a major investor in Anthropic.

Anthropic is currently suing the US government to fight the Pentagon’s blacklisting of the company on national security grounds.

Last week, the company released to the public its much-anticipated Claude Fable 5 model (and its restricted version Claude Mythos 5, which is still being tested with trusted partners). Anthropic said in a blog post announcing the action that officials cited national security concerns with the new models, while offering few specific details.

The post said that the government gave the company “verbal evidence of a potential narrow, non-universal jailbreak” of the public Fable 5 model. A jailbreak is a means by which users can evade restrictions built into the code to unlock prohibited functionality. Anthropic downplayed the significance of the attack, and said other major models, such as OpenAI’s GPT-5.5, could also be affected by the technique described.

Fears of these first Mythos-class models being misused are running high, after Anthropic warned the cybersecurity world in May that the advanced cyber capabilities of Mythos have rapidly discovered thousands of vulnerabilities in ubiquitous software, leading to the decision to restrict the full version of the model to a close group of trusted partners for testing.

This morning, Axios reported that Anthropic technical staff have flown to Washington to meet with White House officials to resolve the issue.

The Wall Street Journal is reporting that the Trump administration’s decision to take action against Anthropic was prompted by discussions that Amazon CEO Andy Jassy had with officials, including Treasury Secretary Scott Bessent. According to the report, Amazon researchers said they had been able to evade some of Fable 5’s security restrictions using specific prompts. Amazon is a major investor in Anthropic.

Anthropic is currently suing the US government to fight the Pentagon’s blacklisting of the company on national security grounds.

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