Compare models
Up to four models side by side.
| GPT-Realtime-2.1 OpenAI | GPT-Realtime-2.1 Mini OpenAI | |
|---|---|---|
| Context window | 128k, Best in row | 128k |
| Max output | 32k, Best in row | 32k |
| Audio input | ✓ | ✓ |
| Reasoning | ✓ | ✓ |
| Tool calling | ✓ | ✓ |
| Licence | Proprietary | Proprietary |
| API model id | gpt-realtime-2.1 |
gpt-realtime-2.1-mini |
At a glance
Popular comparisons
Head-to-head pages for models people weigh against each other.
Language models 77
- Claude Fable 5.1 vs GPT-6 Astra
- Claude Fable 5.1 vs GPT-6 Astra Pro
- Claude Fable 5.1 vs Claude Mythos 5.1
- Claude Opus 5.5 vs GPT-5.6 Sol
- Claude Opus 5.5 vs Qwen3.8 Max Prime
- Chat Latest vs Claude Opus 5.5
- Claude Sonnet 5.5 vs GPT-6.1 Sol
- Claude Sonnet 5.5 vs Gemini 4 Argon
- Claude Sonnet 5.5 vs GPT-6 Sol
- Claude Haiku 5.5 vs GPT-6 Luna
- Claude Haiku 5.5 vs GPT-6 Luna Pro
- Claude Haiku 5.5 vs DeepSeek V4 Flash 0731
- Claude Mythos 5.1 vs GPT-6 Astra
- GPT-6 Astra vs GPT-6 Astra Pro
- Gemini 4 Argon vs GPT-6.1 Sol
- GPT-6.1 Sol vs Kimi K3.1 Pro
- DeepSeek V4 Flash 0731 vs GPT-6 Luna
- GPT-6 Luna vs GPT-6 Luna Pro
- Gemini 4 Argon vs GPT-6 Sol
- Gemini 3.8 Flash vs Grok 4.3
- Gemini 3.8 Flash vs Grok 4.20 Reasoning
- Gemini 3.8 Flash vs Grok 4.20 Non-Reasoning
- Gemini Omni Flash vs Grok 4.7
- Gemini Omni Flash vs Qwen3.8 2.4T A95B
- Claude Sonnet 5.5 vs Gemini Omni Flash
- Grok 4.7 vs Qwen3.8 2.4T A95B
- Claude Sonnet 5.5 vs Grok 4.7
- Gemini 3.7 Flash vs Grok 4.3
- DeepSeek V4 Pro vs Grok 4.3
- DeepSeek V4 Pro vs GPT-6.1 Terra
- DeepSeek V4 Pro vs GPT-6.1 Terra Pro
- DeepSeek V4.1 Flash vs GPT-5.6 Luna
- DeepSeek V4.1 Flash vs Mistral Large 4
- DeepSeek V4.1 Flash vs Qwen3.8 27B
- Claude Mythos 5.1 vs GPT-6 Astra Pro
- GPT-6.1 Sol vs GPT-6 Sol
- GPT-5.6 Sol vs Qwen3.8 Max Prime
- Gemini 3.1 Pro vs GPT-5.6 Sol
- Gemini 3.1 Pro vs GPT-5.6 Terra
- Claude Sonnet 5.5 vs GPT-5.6 Terra
- Gemini 4 Argon vs GPT-5.6 Terra
- DeepSeek V4 Flash Vision Exp vs GPT-5.6 Luna
- GPT-5.6 Luna vs Mistral Large 4
- Chat Latest vs Claude Fable 5.1
- Chat Latest vs Claude Mythos 5.1
- DeepSeek V4 Flash 0731 vs GPT-6 Luna Pro
- Claude Sonnet 5.5 vs GPT-6 Sol Pro
- Gemini 4 Argon vs GPT-6 Sol Pro
- GPT-6 Sol Pro vs Kimi K3.1 Pro
- Claude Sonnet 5.5 vs GPT-6.1 Sol Pro
- Gemini 4 Argon vs GPT-6.1 Sol Pro
- GPT-6.1 Sol Pro vs Kimi K3.1 Pro
- GPT-6.1 Terra vs Grok 4.3
- GPT-6.1 Terra vs Grok 4.20 Reasoning
- GPT-6.1 Terra Pro vs Grok 4.3
- GPT-6.1 Terra Pro vs Grok 4.20 Reasoning
- Gemini 3.5 Flash-Lite vs Qwen3.8 27B
- Gemini 3.5 Flash-Lite vs Mistral Large 4
- Gemini 3.5 Flash-Lite vs Grok Build 0.1
- Gemini 3.7 Flash vs Grok 4.20 Reasoning
- Gemini 3.7 Flash vs Grok 4.20 Non-Reasoning
- DeepSeek V4 Pro vs Grok 4.20 Reasoning
- DeepSeek V4 Pro vs Grok 4.20 Non-Reasoning
- Gemini 3.8 Flash vs Grok 4.20 Multi-Agent
- Gemini 3.7 Flash vs Grok 4.20 Multi-Agent
- DeepSeek V4 Pro vs Grok 4.20 Multi-Agent
- Gemini 3.8 Flash vs Grok Build 0.1
- Gemini 3.7 Flash vs Grok Build 0.1
- Claude Sonnet 5.5 vs Kimi K3.1 Pro
- Gemini 4 Argon vs Kimi K3.1 Pro
- Claude Sonnet 5.5 vs Qwen3.8 2.4T A95B
- Mistral Large 4 vs Qwen3.8 27B
- GPT-5.6 Terra vs Qwen3.8 Max Prime
- Claude Sonnet 5.5 vs Gemini 3.1 Pro
- Gemini 3.1 Pro vs GPT-6.1 Sol
- Claude Haiku 5.5 vs DeepSeek V4 Flash Vision Exp
- DeepSeek V4 Flash Vision Exp vs GPT-6 Luna
Image generation 18
- GPT-Image-2 vs GPT-Image-2.5 Sunburst
- GPT-Image-2.5 Flare vs GPT-Image-2.5 Sunburst
- Grok Imagine Image 2.0 vs Nano Banana 2.1
- Nano Banana 2.1 vs Nano Banana 2 Lite
- Nano Banana 2.1 vs Runway Gen-4 Image
- Grok Imagine Image 2.0 vs Nano Banana 2
- Grok Imagine Image 2.0 vs Nano Banana 2 Lite
- GPT-Image-2 vs GPT-Image-2.5 Flare
- Nano Banana 2 vs Runway Gen-4 Image
- Nano Banana 2 vs Nano Banana 2.1
- Nano Banana 2 Lite vs Runway Gen-4 Image
- Nano Banana Pro vs Runway Gen-4 Image
- Grok Imagine Image 2.0 vs Nano Banana Pro
- Nano Banana 2 vs Nano Banana Pro
- Grok Imagine Image 2.0 vs Runway Gen-4 Image
- Nano Banana 2.1 vs Runway Gen-4 Image Turbo
- Nano Banana 2 Lite vs Runway Gen-4 Image Turbo
- Grok Imagine Image 2.0 vs Runway Gen-4 Image Turbo
Video generation 11
- Grok Imagine Video 1.5 vs Runway Gen-4.5
- Grok Imagine Video 1.5 vs Runway Act-Two
- Grok Imagine Video 1.5 vs Runway Gen-4 Turbo
- Runway Aleph 2 vs Runway Gen-4.5
- Runway Act-Two vs Runway Gen-4.5
- Grok Imagine Video 1.5 Lite vs Runway Act-Two
- Grok Imagine Video 1.5 Lite vs Runway Gen-4 Turbo
- Grok Imagine Video 1.5 vs Grok Imagine Video 1.5 Lite
- Runway Act-Two vs Runway Gen-4 Turbo
- Grok Imagine Video 1.5 vs Runway Aleph 2
- Runway Act-Two vs Runway Aleph 2
Text to speech 9
- Gemini 3.8 Flash TTS vs GPT-4o Mini TTS
- Gemini 3.8 Flash-Lite TTS vs Gemini 3.8 Flash TTS
- Eleven Flash / Turbo vs Eleven v4
- Eleven v4 vs Eleven v4 Turbo
- Eleven v4 vs Grok Text to Speech
- Gemini 3.8 Flash-Lite TTS vs GPT-4o Mini TTS
- Eleven Flash / Turbo vs Grok Text to Speech
- Eleven v4 Turbo vs Grok Text to Speech
- Eleven Flash / Turbo vs Eleven v4 Turbo
Speech to text 25
- Gemini 3.5 Transcribe vs GPT-Transcribe
- GPT-Transcribe vs Scribe v2
- GPT-Transcribe vs Scribe v2 Realtime
- GPT-4o Mini Transcribe vs Scribe v2
- Gemini 3.5 Transcribe vs Scribe v2
- Gemini 3.5 Transcribe vs GPT-4o Mini Transcribe
- GPT-4o Mini Transcribe vs Grok Speech to Text
- GPT-4o Transcribe vs Scribe v2 Realtime
- Gemini 3.5 Transcribe vs GPT-4o Transcribe
- GPT-4o Transcribe vs GPT-4o Transcribe Diarize
- GPT-4o Transcribe Diarize vs Scribe v2 Realtime
- Gemini 3.5 Transcribe vs GPT-4o Transcribe Diarize
- GPT-Live-Transcribe vs GPT-Realtime-Whisper
- Gemini 3.5 Transcribe Live vs GPT-Live-Transcribe
- GPT-Live-Transcribe vs Scribe v2 Realtime
- Gemini 3.5 Transcribe Live vs GPT-Realtime-Whisper
- GPT-Realtime-Whisper vs Scribe v2 Realtime
- Scribe v2 Realtime vs Whisper
- Gemini 3.5 Transcribe vs Whisper
- GPT-4o Transcribe vs Whisper
- Gemini 3.5 Transcribe Live vs Scribe v2 Realtime
- Gemini 3.5 Transcribe Live vs GPT-4o Transcribe
- Gemini 3.5 Transcribe Live vs GPT-4o Transcribe Diarize
- Grok Speech to Text vs Scribe v2
- GPT-Transcribe vs Grok Speech to Text
Voice and realtime 17
- Gemini 3.5 Live Translate vs GPT-Live 1
- GPT-Live 1 vs Grok Voice 3.0
- Realtime v1 Max vs GPT-Live 1
- Gemini 3.8 Live vs GPT-Realtime-2.1 Mini
- Gemini 3.8 Live vs GPT-Audio-1.5
- Gemini 3.8 Live vs GPT-Realtime-2.1
- GPT-Audio-1.5 vs GPT-Realtime-2.1
- GPT-Audio-1.5 vs GPT-Realtime-2.1 Mini
- GPT-Realtime-2.1 vs GPT-Realtime-2.1 Mini
- Gemini 3.5 Live Translate vs GPT-Realtime-Translate
- GPT-Live 1 vs GPT-Realtime-Translate
- GPT-Realtime-Translate vs Grok Voice 3.0
- Realtime v1 Max vs Grok Voice 3.0
- Realtime v1 Mini vs Grok Voice 3.0
- Realtime v1 Max vs Realtime v1 Mini
- Realtime v1 Mini vs GPT-Live 1
- Gemini 3.5 Live Translate vs Grok Voice 3.0