Opus 5.5 still leads on AA intelligence, but GPT-6.1 Sol shifts the cost frontier
A comparison of reasoning effort settings reveals that Opus 5.5 maintains its lead in Artificial Analysis's Intelligence Index. However, GPT-6.1 Sol significantly alters the cost frontier. The analysis considers costs per benchmark task, encompassing both caching and reasoning, rather than subscription prices. The data for this comparison is sourced from artificialanalysis.ai.
Time & source
Times shown in UTC
Display time zone: UTC
Local time zone unavailable; showing UTC.
PublishedOffset at this time: UTC+0Sep 29, 2026, 20:11 UTC
IngestedOffset at this time: UTC+0Sep 30, 2026, 08:00 UTC
- Published
- Sep 29, 2026, 20:11
- Ingested
- Sep 30, 2026, 08:00
- Source type
- Dev community
- Tier
- Community
- Source status
- Healthy
Tier is a per-source editorial setting, not a per-item score.
This compares reasoning effort settings using Artificial Analysis's Intelligence Index and cost per benchmark task. Costs include caching and reasoning; they aren't subscription prices.