GPT-6 Astra

OpenAI · Closed weights · Released Sep 3, 2026 · $10 in · $50 out per 1M tokens

87Overall · rank 3

Score by job

81 · rank 4 · 3 of 5 benchmarks

Benchmark	Result	Variant	z
DeepSWE	74.1%	gpt-6-astra_xhigh	1.09
FrontierCode	53.3%	gpt-6-astra_max	1.42
LMArena Coding	1489 rating	gpt-6-astra-max	-0.10

100 · rank 1 · 2 of 4 benchmarks

Benchmark	Result	Variant	z
APEX-Agents	64.7%	gpt-6-astra_unknown	1.18
Remote Labor Index	20.8%	gpt-6-astra_unknown	1.83

100 · rank 1 · 3 of 4 benchmarks

Benchmark	Result	Variant	z
GPQA Diamond	95.8%	gpt-6-astra_max	1.70
ARC-AGI-2	95.0%	gpt-6-astra_max	1.43
Humanity’s Last Exam	54.8%	gpt-6-astra_unknown	1.96

100 · rank 1 · 4 of 5 benchmarks

Benchmark	Result	Variant	z
FrontierMath Tiers 1–3	93.7%	gpt-6-astra_max	1.77
FrontierMath Tier 4	97.6%	gpt-6-astra_high	2.37
OTIS Mock AIME	100.0%	gpt-6-astra_max	1.09
ProofBench	99.0%	gpt-6-astra_unknown	2.02

46 · rank 36 · 2 of 2 benchmarks

Benchmark	Result	Variant	z
LMArena Creative Writing	1429 rating	gpt-6-astra-max	-0.68
LMArena Instruction Following	1439 rating	gpt-6-astra-max	-0.94

94 · rank 2 · 1 of 1 benchmarks

Benchmark	Result	Variant	z
LMArena WebDev	1792 rating	gpt-6-astra-max	2.32