diegosouzapw/OmniRoute · error · Error

Kimi Web model does not support reasoning_effort=

Error message

Kimi Web model does not support reasoning_effort=${requested || normalized}

What it means

Validation in resolveKimiWebReasoningEffort: after normalizing the requested value to the REASONING_EFFORT_ form, it is not listed in the model config's supportedReasoningEfforts. Fires when a request passes an unsupported reasoning_effort option for the selected Kimi Web model — the input at fault is the request-level reasoning_effort (or a default that no longer matches the model's allowed set).

Solutions

1. Set reasoning_effort to one of the values the model supports (per its STATIC_MODEL_CONFIGS entry)
2. Omit reasoning_effort entirely so the model's defaultReasoningEffort applies
3. Route to a Kimi Web model whose supported efforts include the requested level

When it happens

Trigger: Thrown at open-sse/config/providers/registry/kimi/web/runtime.ts:49 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of diegosouzapw/OmniRoute@a179ffed5b (2026-08-25). Data as JSON: /api/errors/5fc411e7aa6c7049. Report an issue: GitHub.

Appendix: source

Thrown at open-sse/config/providers/registry/kimi/web/runtime.ts:49

export function resolveKimiWebModelConfig(modelId: string): KimiWebModelConfig | null {
  return STATIC_MODEL_CONFIGS[modelId] || null;
}

export function resolveKimiWebReasoningEffort(
  value: unknown,
  config: KimiWebModelConfig
): string | undefined {
  const requested = toNonEmptyString(value);
  const normalized = requested
    ? requested.startsWith(REASONING_EFFORT_PREFIX)
      ? requested.toUpperCase()
      : `${REASONING_EFFORT_PREFIX}${requested.toUpperCase()}`
    : config.defaultReasoningEffort;

  if (!normalized) return undefined;
  if (!config.supportedReasoningEfforts.includes(normalized)) {
    throw new Error(`Kimi Web model does not support reasoning_effort=${requested || normalized}`);
  }
  return normalized;
}

export function resolveKimiWebContextLength(
  value: unknown,
  config: KimiWebModelConfig
): string | undefined {
  const requested = toNonEmptyString(value);
  const normalized = requested
    ? requested.startsWith(CONTEXT_LENGTH_PREFIX)
      ? requested.toUpperCase()
      : `${CONTEXT_LENGTH_PREFIX}${requested.toUpperCase()}`
    : config.defaultContextLength;

  if (!normalized) return undefined;
  if (!config.supportedContextLengths.includes(normalized)) {
    throw new Error(`Kimi Web model does not support context_length=${requested || normalized}`);

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