Artificial intelligence · September 2026

GPT-6 Astra

The first model pretrained on more than 100,000 GPUs at Stargate Texas.

GPT-6 Astra came from OpenAI's largest training run, the first pretrained on more than 100,000 GPUs at the Stargate site in Abilene, Texas. OpenAI delayed its release to add safeguards after incidents involving agents in cyber operations.

See it in the living tree Wikipedia Source

Arcs above join it to what it stood on, arcs below to what it led to. The bar places this stretch on the tree's whole timeline.

What it built on 2

What it led to 1

GPT-6 Sol and Luna 2026

Watch

Introducing GPT-6 Astra: the most intelligent and aligned model in the world.OpenAI · YouTube

Related measurements

The dashed line marks when it first worked.

Best AI score on GPQA Diamond Latest: 95.8 % correct (2026) Source: Epoch AI, Capabilities & benchmarking (benchmark_data.zip, gpqa_diamond.csv); Anthropic: Claude 3 public launch (March 4, 2024)

Training compute of notable AI models Source: Epoch AI, Notable AI Models (CC BY 4.0)

ML hardware FLOP/s per dollar Source: Epoch AI, ML hardware (CC BY 4.0)