Pace of Acceleration

Age of frontier models · 2026-02-28 – 2026-08-31
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Frontier age, day by day

Today’s measurements, replayed one day at a time by release date.

Oldest frontier modelAverage frontier age

Biggest shift · Apr 23: GPT-5.5 (low) and GPT-5.5 (medium) and 2 more enter; average frontier age 155d → 119d (-36d), oldest member DeepSeek V3 (Dec '24) → DeepSeek V3 (Dec '24).

Current metrics, not observed history: today’s (2026-08-31) scores and costs are replayed by release date, so later metric revisions apply retroactively.