OpenRouter Launches Prompt Caching with Sticky Routing to Drastically Reduce Multi-Turn Costs
Score
92首次系统介绍 OpenRouter 缓存与路由协同策略，信息增量较高。
官方教程，结构清晰，包含原理、示例和实测效果。
直接明确降低 API 成本，开发者可立即应用。
刚刚发布，且对当前 Agent 开发热潮具有及时指导意义。
来源为 OpenRouter 官方 RSS 和官网，信源权威可靠。
Base 92 × T1 Source weight ×1 = 92
Curation line 60Selected
Why selected
High information gain, first systematic introduction of OpenRouter's cache and routing synergy, with outstanding practical value.
AI commentary
「For developers making frequent AI API calls, this feature is a direct money-saver. Sticky routing guarantees cache hit rates, and session_id requires zero configuration—every OpenRouter user should try it immediately.」
Quick overview
OpenRouter released a tutorial explaining how Prompt Caching works with Sticky Routing and session_id. Cache reads cost only 0.1x to 0.5x of input price; sticky routing ensures the same session continuously hits the cache, cutting multi-turn agent costs by over 50%. No extra configuration is needed—just pass session_id in requests—making it ideal for high-frequency, long-conversation scenarios.
- Cache reads cost only 0.1x to 0.5x of input price, significantly reducing inference costs.
- Sticky routing ensures requests with the same session_id always hit the same cache node, boosting hit rates.
- Ideal for multi-turn agents, long conversations, and repeated prompt scenarios, saving massive API costs.
Full text
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