GPT-Realtime-1.5 benchmarks, pricing and specs
GPT-Realtime-1.5 is an OpenAI model with no published release date that takes text, image and audio input and produces text and audio. It costs $4 per 1M input tokens and accepts up to 32,000 tokens of context.
- Per 1M input tokens
- $4
- Context window
- 32K
Data verified August 10, 2026 · Dataset 2026-10-12
Key facts
- Provider
- OpenAI
- Model family
- GPT Realtime
- Release date
- Not reported
- Status
- Current
- Access
- API only
- API model id
- Not reported
- Context window
- 32,000 tokens
- Max output
- 4,096 tokens
- Input
- text, image, audio
- Output
- text, audio
- Task families
- audio, multimodal
- Declared capabilities
- audio understanding, realtime voice, speech to text, text to speech
GPT-Realtime-1.5 pricing
It is the most expensive of 8 current audio models priced per 1M input tokens.
Independent benchmark results
Scores come from independent evaluators that ran the model themselves, pinned to a dated snapshot. Rank is among current models in the same snapshot. OpenAI's own launch figures are listed under strengths with the publisher named, because they are not measured the same way.
No independent benchmark has published a result for GPT-Realtime-1.5 yet. It is still compared below on price, context and capabilities.
Strengths, cautions and best uses
Strengths
- OpenAI documents realtime text and audio input and output for voice agents
Cautions
- No exact compatible public benchmark snapshot is recorded
Best for
- Realtime voice agents
Alternatives to GPT-Realtime-1.5
The closest current audiomodels by price. The cheapest model that scores as well or better is listed first; failing that, the cheapest one within 3% of the benchmark's scale.
Gemini 3.5 Live Translate Preview
- 13% cheaper per 1M input tokens, $3.50 vs $4
- 131K context window vs 32K
- From Google
GPT-4o Transcribe
- 38% cheaper per 1M input tokens, $2.50 vs $4
- 16K context window vs 32K
gpt-audio-1.5
- 38% cheaper per 1M input tokens, $2.50 vs $4
- 128K context window vs 32K
Gemini 3.1 Flash TTS Preview
- 75% cheaper per 1M input tokens, $1 vs $4
- 8K context window vs 32K
- From Google
GPT-Realtime-1.5 FAQ
How much does GPT-Realtime-1.5 cost?
GPT-Realtime-1.5 costs $4 per 1M input tokens at the standard tier. It is the most expensive of 8 current audio models priced per 1M input tokens. Source: OpenAI, verified August 10, 2026.
What is the context window of GPT-Realtime-1.5?
GPT-Realtime-1.5 accepts up to 32,000 tokens of context. It can return up to 4,096 tokens in one response. That ranks #5 of 7 current audio models by context length.
Is GPT-Realtime-1.5 open source or API only?
GPT-Realtime-1.5 is available through OpenAI's API only; its weights are not published.
What are the best alternatives to GPT-Realtime-1.5?
The closest current alternatives by price and measured performance are Gemini 3.5 Live Translate Preview (13% cheaper per 1M input tokens, $3.50 vs $4), GPT-4o Transcribe (38% cheaper per 1M input tokens, $2.50 vs $4), gpt-audio-1.5 (38% cheaper per 1M input tokens, $2.50 vs $4) and Gemini 3.1 Flash TTS Preview (75% cheaper per 1M input tokens, $1 vs $4).
Sources
- GPT-Realtime-1.5 model · OpenAI · official · verified August 10, 2026
Cite this page
Van Data Team. "GPT-Realtime-1.5 Benchmarks, Pricing and Specs." AI Model Benchmark Dataset 2026-10-12. https://vandatateam.com/ai-model-benchmarks/gpt-realtime-1-5
Reuse the data: JSON · CSV · or explore every model in the AI model benchmark comparison.
Production evaluation
Deciding whether GPT-Realtime-1.5 fits your workload?
Public benchmarks narrow the shortlist. We test the finalists on your own tasks, data and cost limits, then build the routing and review controls to run the winner in production.
- Evaluation cases and acceptance thresholds tied to real work
- Model routing, fallbacks and cost controls