Opus 4.8 Outperforms Opus 5 in Reasoning and Cost Efficiency
August 4, 2026
User reports indicate Opus 4.8 with High thinking settings offers superior reasoning for long-context file and folder traversal compared to Opus 5. Opus 4.8 demonstrates better token efficiency and avoids the 35% usage spikes caused by looping behaviors seen in Opus 5.
HOW THIS AFFECTS YOU
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builderSwitching to Opus 4.8 with High reasoning may lower your API costs and improve task stability.
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researcherObserve how different thinking-level configurations impact model loop behavior and token consumption.