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GPT-6 Astra (Fast)

OpenAI · Released Sep 4, 2026 · 54 days ago · Closed weights
Latest GPT-6 Astra

Fast variant of GPT-6 Astra for low-latency assistance and high-volume workloads.

Context window
1.05M
tokens in · 128K out
Since the last one
1 days
after GPT-6 Astra
Open in the timeline

Since GPT-6 Astra

2 releases in the GPT-6 Astra line.

GPT-6 AstraSep 3, 20261dGPT-6 Astra (Fast)Sep 4, 2026
Released1 days later
Context1.05Msame
BENCHMARKS

Not in the Epoch Capabilities Index. Epoch benchmarks what it can run, so this is a gap in coverage, not a poor result.

OpenAI's past year

24 release days in the past year, about one every 15 days. The next is expected around Nov 8, 2026. Forecasts ↗

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Specifications

RELEASE DATESep 4, 2026
WEIGHTSClosed weights
CONTEXT WINDOW1.05M
MAX OUTPUT128K
REASONINGNot listed
TOOL CALLINGNot listed
INPUTStext, image/jpeg, image/png, image/gif, image/webp, application/pdf
OUTPUTStext

Models.dev record ↗

Specifications and prices from Models.dev; availability and limits may differ by provider. Benchmarks from Epoch AI (CC BY 4.0), LiveBench and the other sources named above.