Workers AI - Reject busy synchronous inference requests
The rejectIfBusy option lets synchronous Workers AI inference requests fail when capacity is unavailable. Use it when your application should not wait in a capacity queue. Pass the option as the third argument to the Workers AI binding: const response = await env.AI.run( "@cf/google/gemma-4-26b-a4b-it", { messages: [{ role: "user", content: "Explain capacity queues." }], }, { rejectIfBusy: true }, ); const response = await env.AI.run( "@cf/google/gemma-4-26b-a4b-it", { messages:

