On the Claude API, you are no longer billed for a request when it returns stop_reason: "refusal" without Claude having generated any output.
Fetched July 10, 2026
Fixed security issues where tool names and approval IDs matching inherited object properties (e.g., constructor, toString, valueOf, __proto…
Vercel · AI SDKGatewayForbiddenError now exposes ruleId so callers can identify which routing rule denied a request. Added gpt-5.6 model IDs for OpenAI an…
Vercel · AI SDKExpanded Access Transparency documentation for cmek_preserve events with a filter example, example event payload, and two preservation reas…
Anthropic · Claude PlatformRequests returning stop_reason: "refusal" with no output are no longer charged.
Anthropic · Claude Platform