Unsupported Google thinking level mapping for ${model.provid

Error message

Unsupported Google thinking level mapping for ${model.provider}/${model.id}: ${level} -> ${String(mapped)}

What it means

Error "Unsupported Google thinking level mapping for ${model.provider}/${model.id}: ${level} -> ${String(mapped)}" thrown in earendil-works/pi.

Source

Thrown at packages/ai/src/api/google-shared.ts:47

export type ResolvedGoogleThinkingLevel = Exclude<ThinkingLevel, "xhigh" | "max">;

/** Resolve a supported pi level or model-specific Google mapping to a standard Google level. */
export function resolveGoogleThinkingLevel<T extends GoogleApiType>(
	model: Model<T>,
	level: ModelThinkingLevel,
): ResolvedGoogleThinkingLevel {
	if (level === "off") return "high";

	const mapped = model.thinkingLevelMap?.[level];
	const resolvedLevel = typeof mapped === "string" ? mapped.toLowerCase() : level;
	switch (resolvedLevel) {
		case "minimal":
		case "low":
		case "medium":
		case "high":
			return resolvedLevel;
		default:
			throw new Error(
				`Unsupported Google thinking level mapping for ${model.provider}/${model.id}: ${level} -> ${String(mapped)}`,
			);
	}
}

/**
 * Determines whether a streamed Gemini `Part` should be treated as "thinking".
 *
 * Protocol note (Gemini / Vertex AI thought signatures):
 * - `thought: true` is the definitive marker for thinking content (thought summaries).
 * - `thoughtSignature` is an encrypted representation of the model's internal thought process
 *   used to preserve reasoning context across multi-turn interactions.
 * - `thoughtSignature` can appear on ANY part type (text, functionCall, etc.) - it does NOT
 *   indicate the part itself is thinking content.
 * - For non-functionCall responses, the signature appears on the last part for context replay.
 * - When persisting/replaying model outputs, signature-bearing parts must be preserved as-is;
 *   do not merge/move signatures across parts.
 *

View on GitHub (pinned to 4af9d21d3b)

Solutions

Use a supported thinking level for this Google model, or update the thinking-level mapping table.

When it happens

Trigger: Thrown at packages/ai/src/api/google-shared.ts:47 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of earendil-works/pi@4af9d21d3b (2026-08-24). Data as JSON: /api/errors/36db636631ee317c. Report an issue: GitHub.