Launch days
New models, tested on the day they came out, beside models I had already run. Each page is a record of that day.
13 October 2026
Gemini 4 Argon
Gemini 4 Argon in Cursor CLI on its release day, beside Claude Opus 5.5 and GPT-6.1 Sol on the explain task.
7 October 2026
Claude Haiku 5.5 vs GPT-6 Luna
Haiku 5.5 against GPT-6 Luna on the day Haiku came out: speed, real app work, skills and cost, at medium and xhigh effort.
29 September to 6 October 2026
GPT-6.1 Sol speed
GPT-6.1 Sol in Codex CLI, the same small job timed from launch day on, before and after OpenAI said it got faster.
Earlier launch days are in the Models page's method: Sonnet 5.5 on 28 September 2026 and GPT-6.1 Sol on 29 September 2026.