GPT-Realtime-2.1
by OpenAIChat
Realtime speech-to-speech model with configurable reasoning, tool use, and robust voice-agent behavior
- Context
- 128K tokens
- Max output
- 32,000 tokens
- Released
- 2026-07-06
- Weights
- Closed
openai/gpt-realtime-2-1
Specifications
Full facts as recorded, incl. what is unknown.
- Released
- 2026-07-06
- Weights
- Closed
- Input
- Text, Audio, Image
- Output
- Text, Audio
- Context window
- 128,000 max across endpoints
- Max output
- 32,000
- Providers
- 2 + 1 gateway, not counted as providers
- Epoch Capabilities Index
- not evaluated
- Direct price range
- $4.00 in · $24 out per 1M tokens · 1 of 2 providers have a comparable price
More details
- Last updated
- 2026-07-06
- Knowledge cutoff
- 2024-09-30
Capabilities
Across all endpoints: supported if any endpoint supports it.
- Tool calling
- Parallel tools
- Structured output
- Reasoning
- Image input
- PDF input
- Audio input
- Audio output
- Video input
- Prompt cachingunknown
- Web searchunknown
- Computer useunknown
- System messages
- Assistant prefillunknown
- Temperature
- Streamingunknown
- Attachments
Endpoints
One row per provider and variant; gateways are listed separately.
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Price history
No change since 19 Oct 2026. The cheapest direct price has been $4.00 in / $24 out per 1M tokens at OpenAI on every data refresh since then.
Tracked from 19 Oct 2026. Headline-eligible direct prices only, so a price the sanity check flags never draws a spike. Series as JSON
Cost calculator
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Similarly priced models
Blended rate per 1M tokens, each at its own cheapest provider (10M input : 2M output mix).
| Model | Blended/1M | In/1M | Out/1M | Context | vs GPT-Realtime-2.1 |
|---|---|---|---|---|---|
| gpt-realtime-2OpenAI | $7.33 | $4.00 | $24 | 128K | +0% |
| Claude Opus 4.5Anthropic | $7.50 | $4.50 | $22.50 | 200K | +2% |
| ChatGPT-4oOpenAI | $7.50 | $5.00 | $20 | 128K | +2% |
| Claude Opus LatestAnthropic | $6.67 | $4.00 | $20 | 1M | −9% cheaper |
| Claude Opus 5.5Anthropic | $6.67 | $4.00 | $20 | 1M | −9% cheaper |
| Muse WonderMeta | $6.67 | $4.00 | $20 | 1.05M | −9% cheaper |
| Muse WonderMeta | $6.67 | $4.00 | $20 | 1.05M | −9% cheaper |
| GPT-5.6 Sol ProOpenAI | $6.67 | $4.00 | $20 | 1.05M | −9% cheaper |
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