Voice 50 listings at 300 characters each: Sume TTS cost

Fifty property-listing voiceovers of 300 characters each cost $0.7125 on Sume TTS, which is $0.01425 per listing at $0.0475 per 1,000 characters. Use the listing id as the Idempotency-Key so a crashed batch can be rerun without paying twice.

Batch cost

Per listing is the tool price for 300 characters; totals multiply it.

Rerun-safe loop

On a rerun, an identical key and body returns the original job (idempotency_hit true), so the loop is safe to repeat.

listings = [{"id": "L-1041", "text": "Bright two-bedroom..."},
            {"id": "L-1042", "text": "Corner studio..."}]
jobs = {}
for item in listings:
    jobs[item["id"]] = speak(item["text"], f"listing-{item['id']}-v1")
for lid, job in jobs.items():
    print(lid, audio_url(job))

Gotchas

Bump the version suffix (v2) when you change a script on purpose; the same key with new text is a 409. Submit all jobs first and poll afterward, as above, rather than waiting on each in turn. Use metadata for the listing id so you can match results later.