Basic text completion returns incorrect object (thus fails validation)

[mlomb]

Hey! Basically what it says on the title.

If I run the following:

const completion = await openRouter.completions.generate({
  model: "meta-llama/llama-3.1-405b-instruct",
  prompt: "5 + 7 = ",
  stop: ["\n"],
  maxTokens: 10,
  stream: false,
});

I get the following:

ResponseValidationError: Response validation failed
    at safeParseResponse ([REDACTED]/node_modules/@openrouter/sdk/esm/lib/matchers.js:195:20)
    at matchFunc ([REDACTED]/node_modules/@openrouter/sdk/esm/lib/matchers.js:172:17)
    at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
    at async $do ([REDACTED]/node_modules/@openrouter/sdk/esm/funcs/completionsGenerate.js:76:22) {
  statusCode: 200,
  body: '\n' +
    '         \n' +
    '\n' +
    '         \n' +
    '\n' +
    '         \n' +
    '{"id":"gen-1764704027-YmgZuzDAKrAywxh1aHQW","provider":"Google","model":"meta-llama/llama-3.1-405b-instruct","object":"chat.completion","created":1764704027,"choices":[{"logprobs":null,"finish_reason":"stop","native_finish_reason":"stop","index":0,"text":"","reasoning":null}],"system_fingerprint":"","usage":{"completion_tokens":9,"extra_properties":{"google":{"traffic_type":"ON_DEMAND"}},"prompt_tokens":41,"total_tokens":50}}',
  headers: Headers {},
  contentType: 'application/json',
  rawResponse: Response {
    [Symbol(state)]: {
      aborted: false,
      rangeRequested: false,
      timingAllowPassed: true,
      requestIncludesCredentials: true,
      type: 'default',
      status: 200,
      timingInfo: {
        startTime: 536.9904,
        redirectStartTime: 0,
        redirectEndTime: 0,
        postRedirectStartTime: 536.9904,
        finalServiceWorkerStartTime: 0,
        finalNetworkResponseStartTime: 2338.4671,
        finalNetworkRequestStartTime: 603.5989,
        endTime: 0,
        encodedBodySize: 337,
        decodedBodySize: 462,
        finalConnectionTimingInfo: {
          domainLookupStartTime: 536.9904,
          domainLookupEndTime: 536.9904,
          connectionStartTime: 536.9904,
          connectionEndTime: 536.9904,
          secureConnectionStartTime: 536.9904,
          ALPNNegotiatedProtocol: undefined
        }
      },
      cacheState: '',
      statusText: 'OK',
      headersList: [REDACTED],
      urlList: [ https://openrouter.ai/api/v1/completions ],
      body: {
        stream: ReadableStream {
          [Symbol(kType)]: 'ReadableStream',
          [Symbol(kState)]: [Object: null prototype] {
            disturbed: true,
            reader: [ReadableStreamDefaultReader],
            state: 'closed',
            storedError: undefined,
            transfer: [Object: null prototype],
            controller: [ReadableByteStreamController]
          },
          [Symbol(nodejs.webstream.isClosedPromise)]: {
            promise: [Promise],
            resolve: [Function (anonymous)],
            reject: [Function (anonymous)]
          },
          [Symbol(nodejs.webstream.controllerErrorFunction)]: [Function (anonymous)]
        },
        source: null,
        length: null
      }
    },
    [Symbol(headers)]: Headers {}
  },
  cause: ZodError: [
    {
      "code": "invalid_value",
      "values": [
        "text_completion"
      ],
      "path": [
        "object"
      ],
      "message": "Invalid input: expected \"text_completion\""
    }
  ]
      at safeParseResponse.request.request ([REDACTED]/node_modules/@openrouter/sdk/esm/lib/matchers.js:172:63)
      at safeParseResponse ([REDACTED]/node_modules/@openrouter/sdk/esm/lib/matchers.js:192:19)
      at matchFunc ([REDACTED]/node_modules/@openrouter/sdk/esm/lib/matchers.js:172:17)
      at process.processTicksAndRejections (node:internal/process/task_queues:105:5)
      at async $do ([REDACTED]/node_modules/@openrouter/sdk/esm/funcs/completionsGenerate.js:76:22),
  rawValue: {
    id: 'gen-1764704027-YmgZuzDAKrAywxh1aHQW',
    provider: 'Google',
    model: 'meta-llama/llama-3.1-405b-instruct',
    object: 'chat.completion',
    created: 1764704027,
    choices: [
      {
        logprobs: null,
        finish_reason: 'stop',
        native_finish_reason: 'stop',
        index: 0,
        text: '',
        reasoning: null
      }
    ],
    system_fingerprint: '',
    usage: {
      completion_tokens: 9,
      extra_properties: { google: { traffic_type: 'ON_DEMAND' } },
      prompt_tokens: 41,
      total_tokens: 50
    }
  },
  rawMessage: 'Response validation failed'
}

Object is chat.completion but the SDK is expecting text_completion 🤔

Btw I also tried with responseFormat: { type: "text" }, same result

Also, why it says "prompt_tokens":41? I would expect 5 + 7 = to be less tokens.

Thanks!