# GPT-5.4 Pro Sets New FrontierMath Record, Solves First-Ever Tier 4 Problem

_Tuesday, March 24, 2026 at 12:11 AM EDT · AI · Latest · Tier 1 — Major_

![GPT-5.4 Pro Sets New FrontierMath Record, Solves First-Ever Tier 4 Problem — Primary](https://substackcdn.com/image/fetch/$s_!HSol!,w_1200,h_675,c_fill,f_jpg,q_auto:good,fl_progressive:steep,g_auto/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2F63741d46-1c8f-46b4-a6b2-bdf60061ecd9_800x1000.jpeg)

OpenAI's GPT-5.4 Pro set a new high-water mark on FrontierMath, Epoch AI's benchmark of research-grade mathematics, scoring 50% on Tiers 1 through 3 and 38% on Tier 4.

The model solved one Tier 4 problem that no prior AI system had cracked. Epoch's analysis found it likely located a 2011 preprint that allowed it to shortcut significant portions of the intended work.

On the harder FrontierMath: Open Problems benchmark, GPT-5.4 Pro did not solve any problems. Epoch noted the model made novel observations on one problem but characterized them as relatively uninteresting.

Prior to GPT-5.4, AI models had solved roughly 2% of FrontierMath problems overall. The jump to 50% represents the largest single-model improvement since the benchmark launched.

Source: Epoch AI

## Sources

- [Epoch AI](https://epochai.substack.com/p/gpt-54-set-a-new-record-on-frontiermath)

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Retrieved: 2026-05-10T00:30:11.478Z
Publisher: Tech & Business (techandbusiness.org)