gpt-4o-mini-tts

Fined:

• fatal · dates — never said “friday” or “sunday” (20 of 35 transcripts)

→ we sent “The fair runs Fri–Sun, Oct 9–11.”

→ it said “The fair runs. Fry to sun, October 9, to eleventh.”

• fatal · large numbers — never said “one million one” (9 of 31 transcripts)

→ we sent “We logged 1,000,001 events overnight.”

→ it said “We logged one thousand one hundred and one events overnight.”

• fatal · math operators — never said “greater than or equal to” (20 of 23 transcripts)

→ we sent “Keep x ≥ 10 at all times.”

→ it said “Keep x equals 10 at all times.”

+ 6 more fined

Token-billed: $0.60/1M text in, $12/1M audio out; OpenAI publishes no per-character or per-minute rate. At ~25 audio tokens/sec (not OpenAI-published) and 900 chars/min, ~$20 per 1M chars. Legacy tts-1 is $15, tts-1-hd $30 per 1M chars.