Mintplex-Labs/anything-llm · error · APIError

The agent model failed to respond: ${error.message}

Error message

The agent model failed to respond: ${error.message}

What it means

Thrown by AIbitat.#safeProviderCall(), the central wrapper around every LLM provider call. When a provider call throws and the session was NOT user-aborted, the original error is logged and re-thrown as an APIError with this message. This is the single point that converts heterogeneous provider errors into a uniform APIError surfaced to the chat loop and user.

Source

Thrown at server/utils/agents/aibitat/index.js:1001

  /**
   * Wrapper for provider calls that catches errors and converts them to APIError.
   * This ensures provider errors are properly surfaced to the user instead of crashing.
   *
   * @param {Function} providerCall - Async function that calls the provider
   * @returns {Promise<any>} - The result of the provider call
   * @throws {APIError} - If the provider call fails
   */
  async #safeProviderCall(providerCall) {
    try {
      return await providerCall();
    } catch (error) {
      // User-initiated abort - rethrow as-is so the chat loop exits quietly.
      if (this._aborted) throw error;
      console.error(`[AIbitat] Provider error: ${error.message}`, {
        hide_meta: true,
      });
      throw new APIError(`The agent model failed to respond: ${error.message}`);
    }
  }

  /**
   * Handle the async (streaming) execution of the provider
   * with tool calls. Reads the provider from this.providerInstance.
   *
   * @param messages
   * @param functions
   * @param byAgent
   *
   * @returns {Promise<string>}
   */
  async handleAsyncExecution(
    messages = [],
    functions = [],
    byAgent = null,
    depth = 0

View on GitHub (pinned to 526360e320)

Solutions

1. Read error.message to identify the underlying cause (auth, rate limit, network, etc.).
2. Verify the provider API key is present and valid in system/agent settings.
3. For 429/rate-limit messages, wait and retry or reduce request frequency.
4. For context-length errors, reduce the conversation/document size sent to the model.
5. For local providers, confirm the local server is running and the model is loaded.

function validateProviderConfig(providerConfig) {
  if (!providerConfig || !providerConfig.provider || !providerConfig.model)
    throw new Error("Provider config must include provider and model");
}

const hasProviderCredentials = (settings) =>
  !!(settings && (settings.apiKey || settings.basePath || settings.local));

try {
  await aibitat.handleAsyncExecution(messages, functions);
} catch (error) {
  if (error instanceof APIError && /rate limit|429/i.test(error.message)) {
    await backoff(); // retry after delay
  } else throw error;
}

When it happens

Trigger: Any provider stream()/complete() rejection that is not a user abort: invalid or missing API key (401), rate limiting (429), model overloaded/unavailable, billing/quota exhaustion, network failure, request timeout, or context-length exceeded. The if(this._aborted) guard means a user stop does not produce this error.

Common situations: API key rotated but not updated in settings; hitting a provider rate limit during heavy use; local model server stopped mid-session; sending a context larger than the model's window; expired credits on a paid provider.

Related errors

• LLM processing failed: ${error.message}
• Maximum rounds reached
• Unknown provider: ${config.provider}. Please use a valid pro
• ENV: No valid LLM_PROVIDER value found in environment! Using
• res.statusText

AI-assisted analysis of Mintplex-Labs/anything-llm@526360e320 (2026-08-13). Data as JSON: /api/errors/8f1787ee60470835. Report an issue: GitHub.