Cognition price-performance eval: Opus 5.5 and GPT-6 Astra lead on intelligence

Cognition @cognitionOriginally posted 2026.10.28

Open original on X

On our price vs performance evaluation, models cluster into several groups. ▪️ Opus 5.5 and GPT-6 Astra lead in intelligence, at average costs of $12.8 and $6.67, respectively. ▪️ GPT-6.1 Sol leads in cost efficiency, scoring 39% at $1.03 per task. ▪️ GPT-6 Luna and Haiku 5.5 lead on overall cost, scoring above 20% at less than $0.50 per task. Chinese OSS models lag far behind, with Kimi K3 and GLM 5.3 scoring at 17%. American OSS models like Beam and Inkling are even further behind with a score of 3%.