OpenAI · proprietary on Arena · first on Arena 5 September 2026

gpt-6-astra-max

18 days in first place

It held first place on Arena in WebDev (18 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-6-astra-max · Frontier”, jesseahawkins.com, data retrieved 30 Oct 2026. https://jesseahawkins.com/frontier/gpt-6-astra-max/. Data: LMArena, Arena leaderboard dataset, revision 4491b06, CC BY 4.0; Epoch AI, Capabilities & benchmarking, CC BY 4.0.

BibTeX

@misc{hawkins2026frontiergpt6astramax,
  author = {Hawkins, Jesse},
  title = {{gpt-6-astra-max · Frontier}},
  year = {2026},
  howpublished = {\url{https://jesseahawkins.com/frontier/gpt-6-astra-max/}},
  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 59

place 75 of 419 on 28 October 2026

1st10th

On the board: 11 September 2026 to 28 October 2026, the newest snapshot
Score: 1441 (1435–1447) on 28 October 2026 · 15,038 votes

WebDev: 18 days in first place

place 2 of 152 on 28 October 2026

1st10th

On the board: 5 September 2026 to 28 October 2026, the newest snapshot
Score: 1773 (1764–1783) on 28 October 2026 · 7,210 votes
First place: 5 September 2026 to 23 September 2026 · 18 days
Catch-up: No open-weights model has matched it in the 53 days since it first took first place.

Vision: best place 30

place 36 of 167 on 19 October 2026

1st10th

On the board: 13 September 2026 to 19 October 2026, the newest snapshot
Score: 1280 (1270–1290) on 19 October 2026 · 4,012 votes

Epoch AI: GPT-6 Astra

released 3 September 2026 · API access

Chess Puzzles 76.0%
EBR-bench 76.2%
FrontierMath-Tier-4-v2-Private 97.6%
FrontierMath-Tiers-1-3-v2-Private 93.7%
Furniture Assembly 80.0%
GPQA diamond 95.8%
MirrorCode 46.7%
Mystery Game Puzzles 84.0%
OTIS Mock AIME 2024-2025 100.0%
SimpleQA Verified 75.6%
SpireClimb 25.7%

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.