Sonnet 5.5 High vs Opus 5.5 Low: task-level cost data to pick your coding model
Headfirst-Into-Ditch · reddit · 2026-10-12
A developer compared Claude Sonnet 5.5 and Opus 5.5 reasoning tiers in GitHub Copilot CLI and shared a full cost/intelligence/speed table:
- Sonnet 5.5 Medium: intelligence 41, $0.48/task, 2.1 min, 21k tokens
- Opus 5.5 Low: intelligence 42, $0.55/task, 1.3 min, 10k tokens — fastest and leanest
- Sonnet 5.5 High: intelligence 47, $0.88/task, 3.7 min — best intelligence-per-dollar
- Opus 5.5 Medium: intelligence 51, $1.34/task — smartest but pricey
- Sonnet 5.5 xHigh: intelligence 52, $2.01/task, 7.4 min — not worth the time/cost bump
Verdict: Sonnet High for value, Opus Low for speed and token efficiency; data via artificialintelligence.ai.
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