**Opus**: Attends well to information regardless of position in long context. Can synthesize across distant sections. **Haiku**: Strong primacy and recency bias. Information in the middle of long contexts may be underweighted. **Mitigation**: Position-aware prompt design. - Place critical instructions at the START and END of the prompt - Keep context passages short and clearly labeled - Repeat key constraints AFTER the context block - For long documents, extract relevant snippets rather than ...
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# Context Window Utilization
**Opus**: Attends well to information regardless of position in long
context. Can synthesize across distant sections.
**Haiku**: Strong primacy and recency bias. Information in the middle
of long contexts may be underweighted.
**Mitigation**: Position-aware prompt design.
- Place critical instructions at the START and END of the prompt
- Keep context passages short and clearly labeled
- Repeat key constraints AFTER the context block
- For long documents, extract relevant snippets rather than full text
- Use explicit section labels: [Context], [Policy], [Instructions]
Rule of thumb: if the prompt exceeds 2,000 tokens, repeat the most
important constraint immediately before the output instruction.
