Opus 5.5 Low Reasoning Mode Matches Max at 12x Lower Cost

Developer tests show Claude Opus 5.5 achieves similar task completion on low vs. max reasoning, at roughly 12x lower cost, suggesting low mode as the cost-effective default.

2026-09-24 ~ 2026-09-25 · 2 related posts

• Opus 5.5 at 'low' reasoning effort matches 'max' on task completion at 12x lower cost — daniel_mac8 · 2026-09-24
• Test: Opus 5.5 on Low Reasoning Effort Matches Max at 12x Lower Cost — daniel_mac8 · 2026-09-25