Artificial Intelligence & Next-Gen LLMs
Million-Token Context Windows
Million-token context windows let you feed whole codebases or document sets into a single prompt. That power comes with cost, latency, and attention pitfalls. Treat long context as a tool, not a default: retrieve what you need, and use the full window only when the task truly demands it.
要点
- Put the most important content first and last in long prompts.
- Measure cost per request at full context, not average.
- Use retrieval to trim context before paying for tokens.
- Test accuracy on needle-in-haystack tasks for your domain.
- Watch for latency spikes as context grows.
- Cache stable prefixes to cut repeated token costs.
- Validate that the model actually uses the full context.
- Fall back to shorter prompts when quality drops.
よくある質問
Is longer context always better?
No, it can dilute attention and raise cost without improving answers.
How do I test long-context quality?
Hide facts at various positions and measure retrieval accuracy.
Can I afford million-token calls?
Rarely at scale; use caching and retrieval to keep costs sane.
Which tasks need the full window?
Whole-codebase analysis and large document synthesis.
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