For AI agents: a documentation index is available at the root level at /llms.txt and /llms-full.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
The TypeScript SDK and docs are currently in beta.
Report issues on GitHub.
Example Usage
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import { OutputMessage } from "@openrouter/sdk/models";
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let value: OutputMessage = {
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content: [
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{
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text: "Hello! How can I help you today?",
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type: "output_text",
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},
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],
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id: "msg-abc123",
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role: "assistant",
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type: "message",
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};
Fields
Field
Type
Required
Description
content
models.OutputMessageContent[]
✔️
N/A
id
string
✔️
N/A
phase
models.OutputMessagePhaseUnion
➖
The phase of an assistant message. Use commentary for an intermediate assistant message and final_answer for the final assistant message. For follow-up requests with models like gpt-5.3-codex and later, preserve and resend phase on all assistant messages. Omitting it can degrade performance. Not used for user messages.
