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nexus/wiki/concepts/Context-Window.md
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---
title: "Context Window"
type: concept
last_updated: 2026-04-10
---
## Definition
模型的 Context Window 是指单次 API 请求能处理的最大 token 数量(包括输入 prompt + 历史对话 + 输出 response。超过这个上限就会触发"Context Limit Exceeded"错误。
## Key Facts
- **DeepSeek-reasoner**: 16K tokens context window
- **MiniMax-M2.7**: 200K tokens context window
- 16K context 模型配合 OpenClaw safeguard 模式预留 16K tokens = 实际可用 0 tokens
## Related
- [[Compaction]]: OpenClaw 通过上下文压缩管理 token 消耗
- [[Model-Fallback]]: 模型切换的触发机制
- [[Agent-Routing-Rules]]: Telegram channel 绑定特定模型的方式
## Sources
- [[养虾日记4-一次「context-limit-exceeded」错误排查-我以为是小问题-结果踩了大坑]]