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

GPT-5.6 TerraStep 5 Preview

Next to GPT-5.6 Terra

Presets

GPT-5.6 Terra

178167–189

WeightsClosed

ReleasedJul 2026

Price in / out$2.0 / $12

Context1.05M

Core tests taken4 of 8

Step 5 Preview

~175estimated

WeightsClosed

ReleasedSep 2026

Price in / out–

Context–

Core tests taken–

GPT-5.6 Terra and Step 5 Preview are too close to call (3 points apart, within the uncertainty) (one score is an estimate).

Test by testindependent results · Epoch AI

GPT-5.6 TerraStep 5 Preview

These models share no independent tests yet.

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.