For AI agents: The documentation index is at https://docs.digitalocean.com/llms.txt. Markdown versions of pages use the same URL with index.html.md in place of the HTML page (for example, append index.html.md to the directory path instead of opening the HTML document).

Prompt caching for open-source models in serverless inference chat completions and responses API is now in public preview. Open-source models cache context automatically, so you do not need to set the cache_control or prompt_cache_retention parameters.

Prompt caching is available for the following open-source models:

• DeepSeek V3.2
• DeepSeek V4 Pro
• DeepSeek V4 Flash
• Kimi K2.5
• Kimi K2.6
• GLM 5
• GLM-5.1
• GLM-5.2
• gpt-oss-120b
• MiMo V2.5
• MiMo V2.5 Pro
• MiniMax M2.5
• Qwen 3.5
• Qwen3 Coder Flash

For more information, see Use Prompt Caching.