Up to four models

Compare

Side by side on the same independent tests, with price and context. The link in your address bar shares this exact comparison.

GPT-6 AstraGPT-5.6 Terra

Next to GPT-6 Astra

Presets

GPT-6 Astra

197186–209

WeightsClosed

ReleasedSep 2026

Price in / out$10 / $50

Context1.05M

Core tests taken5 of 8

GPT-5.6 Terra

178167–189

WeightsClosed

ReleasedJul 2026

Price in / out$2.0 / $12

Context1.05M

Core tests taken4 of 8

GPT-6 Astra leads GPT-5.6 Terra by 20 points, ahead on 4 of 4 shared core tests, at 4.4× the price.

Test by testindependent results · Epoch AI

GPT-6 AstraGPT-5.6 Terra

Only tests that at least two of these models have taken. Bold rows are the core tests shown on every profile; all of these results inform the index score. Task length (METR) is listed below the chart because it is a duration, not a percentage.