GPT-4o Audio Preview

Pricing — 1 offering(s)

Showing the active price and any recorded history. Full pricing history is available via the paid API — see API docs.

Capability profile

Benchmarks

Operator guidance

OpenAI positions gpt-audio-1.5 as the GA successor to this model at a lower audio-token price ($32/$64 vs $40/$80 per 1M) — prefer gpt-audio-1.5 for new integrations. Choose this entry specifically only if you need GPT-4o's particular underlying model behaviour rather than the newer gpt-audio-1.5 model. For pure text-to-speech with no audio-input need, tts-1-hd is simpler and character-billed rather than token-billed.

Use cases

• Conversational voice applications needing both audio understanding and audio response in one model call
• Use cases where GPT-4o's reasoning/instruction-following should directly drive speech output, not a separate TTS pass over generated text
• Migrating off this in favour of gpt-audio-1.5 unless a specific reason to stay on GPT-4o's underlying model requires it

Limitations

• Still labelled preview by OpenAI, not GA
• Token-billed pricing is harder to estimate cost for than tts-1's flat per-character rate — total cost depends on how many audio tokens a given utterance encodes to, which OpenAI does not publish a fixed ratio for
• No voice cloning or custom voice creation
• Superseded by gpt-audio-1.5 at a lower price for equivalent capability

Citations

• GPT-4o Audio model page (OpenAI)
• OpenAI audio guide