first update:
Claude Opus 4.8 – xhigh on march-may 110 tasks: 56.4%
gpt-5-xhigh: 62.7% – $2.25
gpt-5.5-medium: 58.9% – $0.98
Opus 4.8 - xhigh: 56.4% – $2.02
Opus 4.7 – high: 53.1% – $1.32
Opus 4.6 - high: 47.8% – $1.29
more open-weight models to come in ~1-2 weeks