GPT-Realtime-2.1
As of Oct 4, 2026, the cheapest GPT-Realtime-2.1 API price is $4 per 1M input tokens (OpenAI) and $24 per 1M output tokens (OpenAI). GPT-Realtime-2.1 is offered by 2 providers in the gpt family, reasoning enabled.
API pricing by provider
Metered per-token prices. Cheapest input and output are highlighted; † marks a context-tier surcharge. How prices are ranked.
| OpenAI | Cheapest$4 | Cheapest$24 | $0.4 | — | 128k |
| Vercel AI Gateway | $4 | $24 | $0.4 | — | 128k |
GPT-Realtime-2.1 pricing FAQ
What is the cheapest GPT-Realtime-2.1 API?
As of Oct 4, 2026, OpenAI has the lowest GPT-Realtime-2.1 output price at $24 per 1M tokens, and OpenAI has the lowest input price at $4 per 1M tokens. Prices are metered per-token rates in USD; free tiers and subscription plans are excluded.
How much does GPT-Realtime-2.1 cost on OpenAI?
OpenAI charges $4 per 1M input tokens and $24 per 1M output tokens for GPT-Realtime-2.1.
How many providers offer GPT-Realtime-2.1?
2 providers list GPT-Realtime-2.1 on Sovyron; 2 of them sell it at a metered per-token price.
Is GPT-Realtime-2.1 free?
No provider in the Sovyron catalog lists a free tier for GPT-Realtime-2.1.
What is the context window of GPT-Realtime-2.1?
GPT-Realtime-2.1 supports a 128k-token context window and up to 32k output tokens.
Token cost calculator
What a month costs at one provider's published rates. Enter the tokens you expect to send and receive; cached tokens use the cached-input price where the provider lists one, and count as ordinary input where it does not.
Estimated
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