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GPT-6 Astra

OpenAI

Released
September 3, 2026
Data date
September 24, 2026
Predecessor
GPT-5.6 Sol
Benchmark-Meta-Score
Provisional, 58.4 % panel coverage
Speed
63.4 tokens/s
Output throughput
Price
Input · Output / 1M tokens
Input
Text, Image
Output
Text

With GPT-6 Astra, OpenAI introduced an experimental approach to long-term context in Codex. The model can keep notes across context windows and search earlier messages or tool results. During lengthy debugging work, fewer details need to be repeatedly compressed into a single summary.

OpenAI classifies Astra’s cybersecurity capability as Critical under its Preparedness Framework. The release therefore includes additional safeguards and restrictions on certain security tasks. GPT-6.1 Sol approaches Astra on several coding and professional-work evaluations, while OpenAI still reports an advantage for Astra on its hardest scientific tasks.

Position
Rank 2 of 24
Index score
85.6 / 100
1.GPT-6.1 Sol90 / 100
2.GPT-6 Astra85.6 / 100
3.Claude Opus 578.8 / 100
4.GPT-6 Sol77.5 / 100
5.Grok 4.676.9 / 100
6.Grok 4.772.5 / 100
7.Gemini 3.8 Flash66.3 / 100
8.GPT-5.6 Sol65.6 / 100
9.GPT-5.561.9 / 100
11.Grok 4.558.8 / 100
12.Gemini 3.7 Flash58.1 / 100
13.Gemini 3 Pro56.9 / 100
14.Claude Haiku 5.552.5 / 100
15.Gemini 3.6 Flash43.1 / 100
16.GPT-5.240.1 / 100
17.GPT-5.6 Luna33.1 / 100
17.GPT-6 Luna33.1 / 100
19.GPT-5.6 Terra31.3 / 100
20.Gemini 3.5 Flash28.8 / 100
21.Claude Sonnet 527.5 / 100
22.Grok 4.325.2 / 100
23.GPT-5 mini5 / 100
24.o3-mini1.3 / 100
Methodology and source