mem0ai/mem0 · error · Error

Unknown provider in model

Error message

Unknown provider in model: ${model}

What it means

When no providerOverride is given, extractProvider() scans the model id for a word-boundary match against the PROVIDERS list (ai21, amazon, anthropic, cohere, meta, mistral, stability, writer, deepseek, gpt-oss, perplexity, snowflake, titan, command, j2, llama, minimax). If none appears, the SDK cannot infer how to parse the response, so it throws with the model id that failed.

Solutions

  1. Use the full Bedrock model id including the provider prefix, e.g. 'anthropic.claude-3-sonnet-20240229-v1:0'
  2. If the id genuinely lacks a provider token, set providerOverride to the correct family (e.g. 'anthropic')
  3. For brand-new Bedrock models not in the list, providerOverride is the only path; also report an issue so the list is extended

Example fix

// before
new AWSBedrockLLM({ model: "claude-3-sonnet" }); // no provider token

// after
new AWSBedrockLLM({ model: "claude-3-sonnet", providerOverride: "anthropic" });
// or use the full id: "anthropic.claude-3-sonnet-20240229-v1:0"
Defensive patterns

Strategy: validation

Validate before calling

const KNOWN = ["ai21","amazon","anthropic","cohere","meta","mistral","stability","writer","deepseek","gpt-oss","perplexity","snowflake","titan","command","j2","llama","minimax"];
const hasProvider = KNOWN.some((p) => new RegExp(`\\b${p}\\b`).test(modelId));
if (!hasProvider && !override) {
  throw new Error(`Model id '${modelId}' contains no known provider - set providerOverride`);
}

Type guard

function isUnknownProviderModelError(err: unknown): boolean {
  return err instanceof Error && err.message.startsWith("Unknown provider in model:");
}

Try / catch

try { extractProvider(modelId); }
catch (err) {
  if (err instanceof Error && err.message.startsWith("Unknown provider in model:")) {
    throw new Error("Use the full Bedrock model id (e.g. anthropic.claude-3-...) or pass providerOverride");
  }
  throw err;
}

Prevention

When it happens

Trigger: Passing a bare model name like 'claude-3-sonnet' (no 'anthropic.' prefix), 'my-custom-model', or an inference-profile / marketplace ARN whose identifier contains no recognized provider token; region-prefixed ids like 'eu.anthropic...' actually match ('anthropic' token), but fully custom fine-tune names do not.

Common situations: Custom or fine-tuned model names; CrossRegionInference profile ids; copying display names from the Bedrock console instead of the model id; new provider models added to Bedrock before this list is updated.

Related errors

AI-assisted analysis of mem0ai/mem0@001c235229 (2026-08-15). Data as JSON: /api/errors/fe6e5cb8379b9483. Report an issue: GitHub.

Appendix: source

Thrown at mem0-ts/src/oss/src/llms/aws_bedrock.ts:50

export function extractProvider(
  model: string,
  providerOverride?: string,
): string {
  if (providerOverride) {
    if (!PROVIDERS.includes(providerOverride)) {
      throw new Error(
        `Unknown providerOverride '${providerOverride}'. Valid providers: ${PROVIDERS.join(", ")}`,
      );
    }
    return providerOverride;
  }
  for (const provider of PROVIDERS) {
    const re = new RegExp(
      `\\b${provider.replace(/[.*+?^${}()|[\]\\]/g, "\\$&")}\\b`,
    );
    if (re.test(model)) return provider;
  }
  throw new Error(`Unknown provider in model: ${model}`);
}

/**
 * AWS Bedrock fields (awsRegion / awsAccessKeyId / awsSecretAccessKey /
 * awsSessionToken / client) now live on the shared `LLMConfig`, so the
 * provider is configurable through the standard typed `Memory` config path.
 */
type AWSBedrockConfig = LLMConfig;

/**
 * AWS Bedrock LLM provider for the TypeScript OSS SDK.
 *
 * Mirrors `mem0/llms/aws_bedrock.py`. Uses the Bedrock **Converse API**
 * (`ConverseCommand`), which provides a uniform message/tool interface across
 * the Anthropic / Amazon (Nova) / Meta / Mistral / Cohere model families, so a
 * single code path serves them all (the Python provider keeps per-family
 * `invoke_model` branches for legacy reasons; Converse supersedes them).
 *

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