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OpenAI

GPT Realtime 1.5

Speech generation model for controllable voice, narration, and audio delivery

Model facts

Context window
32K tokens
Maximum output
4K tokens
Cheapest paid input
$4 per 1M tokens
Cheapest paid output
$16 per 1M tokens
Open weights
no
Providers
2

Capabilities and modalities

tool calling, attachments, temperature control, text, image, audio.

Observed price history

  • 2026-08-24: $4 input / $16 output per 1M tokens

API providers

  • FastRouter — model id openai/gpt-realtime-1.5; $4 input / $16 output per 1M tokens; provider documentation
  • Vercel AI Gateway — model id openai/gpt-realtime-1.5; $4 input / $16 output per 1M tokens; provider documentation