OpenAI · Single modalityReleased 2026-07-09

gpt-realtime-2.1

openai/gpt-realtime-2.1 id

GPT-Realtime-2.1 updates GPT-Realtime-2 with improved alphanumeric recognition, silence and noise handling, and interruption behavior. It supports speech-to-speech interactions with configurable reasoning effort, instruction following, and tool use for complex voice-agent workflows.

Type

Use gpt-realtime-2.1

# Drop-in OpenAI-compatible client
$ import { generateText } from 'ai'
$ 
$ const { text } = await generateText({
$   model: 'openai/gpt-realtime-2.1',
$   baseURL: 'https://synapse.garden/api/v1',
$   apiKey: process.env.MG_KEY,
$   prompt: 'Why is the sky blue?',
$ })

128K

CONTEXT WINDOW

32K

MAX OUTPUT

$4.40/M

INPUT · PER M

$26.40/M

OUTPUT · PER M

PRICING

List prices, every modality.

Rate	Per million tokens · USD
Input	$4.40/M
Output	$26.40/M
Cache read	$0.440/M

Honest list pricesHow we calculate prices

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FAQ · GPT-REALTIME-2.1

Frequently asked

01 / 04

How do I call gpt-realtime-2.1 from my code?

Use the OpenAI or Anthropic SDK and point baseURL at https://synapse.garden/api/v1. Set model: ‘openai/gpt-realtime-2.1’ and supply your Synapse Garden API key. No code changes beyond the base URL.

02 / 04

How much does gpt-realtime-2.1 cost?

Input: $4.40/M per million tokens. Output: $26.40/M per million tokens. The free tier includes a million tokens every month at no cost.

03 / 04

What's the context window for gpt-realtime-2.1?

gpt-realtime-2.1 supports a context window of 128K tokens, with a maximum output of 32K tokens.

04 / 04

Do I need a separate Anthropic or OpenAI account?

No. Synapse Garden is the single API surface — one key gives you OpenAI, Anthropic, Google, Meta, Mistral, DeepSeek, xAI, Cohere, and more. Billing, rate limits, and audit logs are unified.

READY

Try gpt-realtime-2.1 in three minutes.

Sign up, create a key, drop our base URL into your existing client. The free tier includes a million tokens every month — no credit card.

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