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FrontierMath Tier 4 leaderboard
FrontierMath Tier 4
5 models tested · Updated 2026-04-23 · Verified sources only
GPT-5.5 Pro
leads at
39.6%
1
GPT-5.5 Pro
OpenAI ·
OpenAI Blog
· 2026-04-23
New FrontierMath Tier 4 SOTA.
39.6%
2
GPT-5.4 Pro
OpenAI ·
Epoch AI Blog
· 2026-03-05
Research-grade math problems. Solved 2 previously unsolved problems. Best Tier 4 score to date.
38.0%
3
GPT-5.5
OpenAI ·
OpenAI Blog
· 2026-04-23
8pt over GPT-5.4 (27.1), 12pt over Opus 4.7 (22.9).
35.4%
4
GPT-5.4
OpenAI ·
OpenAI Blog
· 2026-04-23
8pt below GPT-5.5.
27.1%
5
Muse Spark
Meta ·
X/@EpochAIResearch
· 2026-04-08
Independent evaluation by Epoch AI on Tier 4 (research-level math). Behind GPT-5.4 Pro (38%).
15.0%