OpenAI · proprietary on Arena · first on Arena 3 March 2025

gpt-4.5-preview-2025-02-27

6 days in first place

It held first place on Arena in Vision (6 days).

Embed

Who held first place

<iframe src="https://jesseahawkins.com/frontier/embed/" title="Frontier: who held first place on each Arena leaderboard, and for how long" width="100%" height="560" style="border:0;max-width:100%" loading="lazy"></iframe>

Credits LMArena.

The open-weights catch-up

<iframe src="https://jesseahawkins.com/frontier/embed/catch-up/" title="Frontier: the days until open weights matched each closed leader" width="100%" height="900" style="border:0;max-width:100%" loading="lazy"></iframe>

Credits LMArena.

The saturation clock

<iframe src="https://jesseahawkins.com/frontier/embed/clock/" title="Frontier: the days from each benchmark’s release to a model at 90%" width="100%" height="640" style="border:0;max-width:100%" loading="lazy"></iframe>

Credits Epoch AI.

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Cite

This page

Jesse Hawkins, “gpt-4.5-preview-2025-02-27 · Frontier”, jesseahawkins.com, data retrieved 30 Oct 2026. https://jesseahawkins.com/frontier/gpt-4-5-preview-2025-02-27/. Data: LMArena, Arena leaderboard dataset, revision 4491b06, CC BY 4.0; Epoch AI, Capabilities & benchmarking, CC BY 4.0.

BibTeX

@misc{hawkins2026frontiergpt45preview20250227,
  author = {Hawkins, Jesse},
  title = {{gpt-4.5-preview-2025-02-27 · Frontier}},
  year = {2026},
  howpublished = {\url{https://jesseahawkins.com/frontier/gpt-4-5-preview-2025-02-27/}},
  note = {Data: LMArena, Arena leaderboard dataset, revision 4491b06, CC BY 4.0; Epoch AI, Capabilities \& benchmarking, CC BY 4.0, retrieved 2026-10-30}
}

Arena · LMArena

LMArena, "Arena leaderboard dataset", Hugging Face, revision 4491b06. https://huggingface.co/datasets/lmarena-ai/leaderboard-dataset. CC BY 4.0.

Benchmarks · Epoch AI

Epoch AI, 'Capabilities & benchmarking'. Published online at epoch.ai. Retrieved from 'https://epoch.ai/benchmarks' [online resource]. CC BY 4.0.

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Post on X

Text: best place 2

place 126 of 419 on 28 October 2026

1st10th100th

On the board: 3 March 2025 to 28 October 2026, the newest snapshot
Score: 1417 (1412–1423) on 28 October 2026 · 14,547 votes

Vision: 6 days in first place

place 97 of 167 on 19 October 2026

1st10th

On the board: 20 March 2025 to 19 October 2026, the newest snapshot
Score: 1195 (1183–1207) on 19 October 2026 · 2,925 votes
First place: 20 March 2025 to 26 March 2025 · 6 days
Catch-up: Open weights matched it on 18 August 2025, 151 days after it first took first place: step-3.

Epoch AI: GPT-4.5

released 27 February 2025 · API access

GPQA diamond 68.7%
MATH level 5 78.6%
OTIS Mock AIME 2024-2025 37.8%

Sources

Arena scores come from people voting between two anonymous answers. First place is the highest score; the top two are often within each other’s margin of error. LMArena, Arena leaderboard dataset, revision 4491b06, retrieved 30 October 2026; Epoch AI, Capabilities & benchmarking, retrieved 30 October 2026. Both CC BY 4.0.