On the Claude API, you are no longer billed for a request when it returns stop_reason: "refusal" without Claude having generated any output. See Streaming refusals for detecting and handling refusals.
Fetched July 11, 2026
Expanded Access Transparency documentation for cmek_preserve events with a filter example, example event payload, and two preservation reas…
Anthropic · Claude PlatformFixed hook events not streaming during SessionStart hooks in headless sessions, which could cause remote workers to be idle-reaped mid-hook.
Anthropic · Claude CodeGatewayForbiddenError now exposes ruleId so callers can identify which routing rule denied a request. Added gpt-5.6 model IDs for OpenAI an…
Vercel · AI SDKGatewayForbiddenError now exposes a ruleId property so callers can identify which routing rule denied a request. Added gpt-5.6 and grok-4.5…
Vercel · AI SDK