OpenAI Audio Big Closed weights

GPT-Realtime-1.5

262 days since OpenAI announced it · 23 Feb 2026

GPT-Realtime-1.5 is a closed-weights audio model from OpenAI, announced 23 Feb 2026. It costs $32 in / $64 out per 1M audio tokens.

Price: $32 in / $64 out; per 1M audio tokens
Parameters: —; not disclosed

Announcement: developers.openai.com/api/docs/changelog
Docs: developers.openai.com/api/docs/models/gpt-realtime-1.5

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OpenAI · Big · Realtime

closed weights

GPT-Realtime-2.1 +60d 6 Jul 2026
GPT-Realtime-2 +73d 7 May 2026
GPT-Realtime-1.5 23 Feb 2026

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Facts last updated 7 Nov 2026, from OpenAI’s own pages.