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MiniCPM-o 2.6

Archieve at: 2026-02-02

MiniCPM-o 2.6 is the latest and most capable model in the MiniCPM-o series. The model is built in an end-to-end fashion based on SigLip-400M, Whisper-medium-300M, ChatTTS-200M, and Qwen2.5-7B with a total of 8B parameters. It exhibits a significant performance improvement over MiniCPM-V 2.6, and introduces new features for real-time speech conversation and multimodal live streaming. Notable features of MiniCPM-o 2.6 include:

  • 🔥 Leading Visual Capability. MiniCPM-o 2.6 achieves an average score of 70.2 on OpenCompass, a comprehensive evaluation of 8 popular benchmarks. With only 8B parameters, it surpasses widely used proprietary models like GPT-4o-202405, Gemini 1.5 Pro, and Claude 3.5 Sonnet for single image understanding. It also outperforms GPT-4V and Claude 3.5 Sonnet in multi-image and video understanding, and shows promising in-context learning capability.

  • 🎙 State-of-the-art Speech Capability. MiniCPM-o 2.6 supports bilingual real-time speech conversation with configurable voices in English and Chinese. It outperforms GPT-4o-realtime on audio understanding tasks such as ASR and STT translation, and shows state-of-the-art performance on speech conversation in both semantic and acoustic evaluations in the open-source community. It also allows for fun features such as emotion/speed/style control, end-to-end voice cloning, role play, etc.

  • 🎬 Strong Multimodal Live Streaming Capability. As a new feature, MiniCPM-o 2.6 can accept continuous video and audio streams independent of user queries, and support real-time speech interaction. It outperforms GPT-4o-202408 and Claude 3.5 Sonnet and shows state-of-the-art performance in the open-source community on StreamingBench, a comprehensive benchmark for real-time video understanding, omni-source (video & audio) understanding, and multimodal contextual understanding.

  • 💪 Strong OCR Capability and Others. Advancing popular visual capabilities from MiniCPM-V series, MiniCPM-o 2.6 can process images with any aspect ratio and up to 1.8 million pixels (e.g., 1344x1344). It achieves state-of-the-art performance on OCRBench for models under 25B, surpassing proprietary models such as GPT-4o-202405. Based on the latest RLAIF-V and VisCPM techniques, it features trustworthy behaviors, outperforming GPT-4o and Claude 3.5 Sonnet on MMHal-Bench, and supports multilingual capabilities on more than 30 languages.

  • 🚀 Superior Efficiency. In addition to its friendly size, MiniCPM-o 2.6 also shows state-of-the-art token density (i.e., the number of pixels encoded into each visual token). It produces only 640 tokens when processing a 1.8M pixel image, which is 75% fewer than most models. This directly improves the inference speed, first-token latency, memory usage, and power consumption. As a result, MiniCPM-o 2.6 can efficiently support multimodal live streaming on end-side devices such as iPads.

  • 💫 Easy Usage. MiniCPM-o 2.6 can be easily used in various ways: (1) llama.cpp support for efficient CPU inference on local devices, (2) int4 and GGUF format quantized models in 16 sizes, (3) vLLM support for high-throughput and memory-efficient inference, (4) fine-tuning on new domains and tasks with LLaMA-Factory, (5) quick local WebUI demo, and (6) online web demo on server.

Model Architecture.

  • End-to-end Omni-modal Architecture. Different modality encoders/decoders are connected and trained in an end-to-end fashion to fully exploit rich multimodal knowledge. The model is trained in a fully end-to-end manner with only CE loss.
  • Omni-modal Live Streaming Mechanism. (1) We change the offline modality encoder/decoders into online ones for streaming inputs/outputs. (2) We devise a time-division multiplexing (TDM) mechanism for omni-modality streaming processing in the LLM backbone. It divides parallel omni-modality streams into sequential info within small periodic time slices.
  • Configurable Speech Modeling Design. We devise a multimodal system prompt, including traditional text system prompt, and a new audio system prompt to determine the assistant voice. This enables flexible voice configurations in inference time, and also facilitates end-to-end voice cloning and description-based voice creation.

Evaluation

Click to view visual understanding results.

Image Understanding

Model Size Token Density+ OpenCompass OCRBench MathVista mini ChartQA MMVet MMStar MME MMB1.1 test AI2D MMMU val HallusionBench TextVQA val DocVQA test MathVerse mini MathVision MMHal Score
Proprietary
GPT-4o-20240513 - 1088 69.9 736 61.3 85.7 69.1 63.9 2328.7 82.2 84.6 69.2 55.0 - 92.8 50.2 30.4 3.6
Claude3.5-Sonnet - 750 67.9 788 61.6 90.8 66.0 62.2 1920.0 78.5 80.2 65.9 49.9 - 95.2 - - 3.4
Gemini 1.5 Pro - - 64.4 754 57.7 81.3 64.0 59.1 2110.6 73.9 79.1 60.6 45.6 73.5 86.5 - 19.2 -
GPT-4o-mini-20240718 - 1088 64.1 785 52.4 - 66.9 54.8 2003.4 76.0 77.8 60.0 46.1 - - - - 3.3
Open Source
Cambrian-34B 34B 1820 58.3 591 50.3 75.6 53.2 54.2 2049.9 77.8 79.5 50.4 41.6 76.7 75.5 - - -
GLM-4V-9B 13B 784 59.1 776 51.1 - 58.0 54.8 2018.8 67.9 71.2 46.9 45.0 - - - - -
Pixtral-12B 12B 256 61.0 685 56.9 81.8 58.5 54.5 - 72.7 79.0 51.1 47.0 75.7 90.7 - - -
VITA-1.5 8B 784 63.3 741 66.2 - 52.7 60.2 2328.1 76.8 79.2 52.6 44.6 - - - - -
DeepSeek-VL2-27B (4B) 27B 672 66.4 809 63.9 86.0 60.0 61.9 2253.0 81.2 83.8 54.0 45.3 84.2 93.3 - - 3.0
Qwen2-VL-7B 8B 784 67.1 866 58.2 83.0 62.0 60.7 2326.0 81.8 83.0 54.1 50.6 84.3 94.5 31.9 16.3 3.2
LLaVA-OneVision-72B 72B 182 68.1 741 67.5 83.7 60.6 65.8 2261.0 85.0 85.6 56.8 49.0 80.5 91.3 39.1 - 3.5
InternVL2.5-8B 8B 706 68.3 822 64.4 84.8 62.8 62.8 2344.0 83.6 84.5 56.0 50.1 79.1 93.0 39.5 19.7 3.4
MiniCPM-V 2.6 8B 2822 65.2 852* 60.6 79.4 60.0 57.5 2348.4* 78.0 82.1 49.8* 48.1* 80.1 90.8 25.7 18.3 3.6
MiniCPM-o 2.6 8B 2822 70.2 897* 71.9* 86.9* 67.5 64.0 2372.0* 80.5 85.8 50.4* 51.9 82.0 93.5 41.4* 23.1* 3.8
* We evaluate this benchmark using chain-of-thought prompting. Specifically, for MME, we used this technique only for the Cognition set.

+ Token Density: number of pixels encoded into each visual token at maximum resolution, i.e., # pixels at maximum resolution / # visual tokens.

Note: For proprietary models, we calculate token density based on the image encoding charging strategy defined in the official API documentation, which provides an upper-bound estimation.

Multi-image and Video Understanding

Model Size BLINK val Mantis Eval MIRB Video-MME (wo / w subs)
Proprietary
GPT-4o-20240513 - 68.0 - - 71.9/77.2
GPT4V - 54.6 62.7 53.1 59.9/63.3
Open-source
VITA-1.5 8B 45.0 - - 56.1/58.7
LLaVA-NeXT-Interleave 14B 14B 52.6 66.4 30.2 -
LLaVA-OneVision-72B 72B 55.4 77.6 - 66.2/69.5
MANTIS 8B 8B 49.1 59.5 34.8 -
Qwen2-VL-7B 8B 53.2 69.6* 67.6* 63.3/69.0
InternVL2.5-8B 8B 54.8 67.7 52.5 64.2/66.9
MiniCPM-V 2.6 8B 53.0 69.1 53.8 60.9/63.6
MiniCPM-o 2.6 8B 56.7 71.9 58.6 63.9/67.9
* We evaluate officially released checkpoints by ourselves.
Click to view audio understanding and speech conversation results.

Audio Understanding

Task Size ASR (zh) ASR (en) AST Emotion
Metric CER↓ WER↓ BLEU↑ ACC↑
Dataset AISHELL-1 Fleurs zh WenetSpeech test-net LibriSpeech test-clean GigaSpeech TED-LIUM CoVoST en2zh CoVoST zh2en MELD emotion
Proprietary
GPT-4o-Realtime - 7.3* 5.4* 28.9* 2.6* 12.9* 4.8* 37.1* 15.7* 33.2*
Gemini 1.5 Pro - 4.5* 5.9* 14.3* 2.9* 10.6* 3.0* 47.3* 22.6* 48.4*
Open-Source
Qwen2-Audio-7B 8B - 7.5 - 1.6 - - 45.2 24.4 55.3
Qwen2-Audio-7B-Instruct 8B 2.6* 6.9* 10.3* 3.1* 9.7* 5.9* 39.5* 22.9* 17.4*
VITA-1.5 8B 2.16 - 8.4 3.4 - - - - -
GLM-4-Voice-Base 9B 2.5 - - 2.8 - - - -
MiniCPM-o 2.6 8B 1.6 4.4 6.9 1.7 8.7 3.0 48.2 27.2 52.4
* We evaluate officially released checkpoints by ourselves.

Speech Generation

Task Size SpeechQA
Metric ACC↑ G-Eval (10 point)↑ Semantic ELO score↑ Acoustic ELO score↑ Overall ELO score↑ UTMOS↑ ASR-WER↓
Dataset Speech Llama Q. Speech Web Q. Speech Trivia QA Speech AlpacaEval AudioArena
Proprietary
GPT-4o-Realtime 71.7 51.6 69.7 7.4 1157 1203 1200 4.2 2.3
Open-Source
GLM-4-Voice 9B 50.0 32.0 36.4 5.1 999 1147 1035 4.1 11.7
Llama-Omni 8B 45.3 22.9 10.7 3.9 960 878 897 3.2 24.3
VITA-1.5 8B 46.7 28.1 23.3 2.0 - - - - -
Moshi 7B 43.7 23.8 16.7 2.4 871 808 875 2.8 8.2
Mini-Omni 1B 22.0 12.8 6.9 2.5 926 803 865 3.4 10.0
MiniCPM-o 2.6 8B 61.0 40.0 40.2 5.1 1088 1163 1131 4.2 9.8
All results are from AudioEvals, and the evaluation methods along with further details can be found in AudioEvals.

End-to-end Voice Cloning

Task Voice cloning
Metric SIMO↑ SIMO↑
Dataset Seed-TTS test-zh Seed-TTS test-en
F5-TTS 76 67
CosyVoice 75 64
FireRedTTS 63 46
MiniCPM-o 2.6 57 47
Click to view multimodal live streaming results.

Multimodal Live Streaming: results on StreamingBench

Model Size Real-Time Video Understanding Omni-Source Understanding Contextual Understanding Overall
Proprietary
Gemini 1.5 Pro - 77.4 67.8 51.1 70.3
GPT-4o-202408 - 74.5 51.0 48.0 64.1
Claude-3.5-Sonnet - 74.0 41.4 37.8 59.7
Open-source
VILA-1.5 8B 61.5 37.5 26.7 49.5
LongVA 7B 63.1 35.9 30.2 50.7
LLaVA-Next-Video-34B 34B 69.8 41.7 34.3 56.7
Qwen2-VL-7B 8B 71.2 40.7 33.1 57.0
InternVL2-8B 8B 70.1 42.7 34.1 57.0
VITA-1.5 8B 70.9 40.8 35.8 57.4
LLaVA-OneVision-7B 8B 74.3 40.8 31.0 58.4
InternLM-XC2.5-OL-7B 8B 75.4 46.2 33.6 60.8
MiniCPM-V 2.6 8B 72.4 40.2 33.4 57.7
MiniCPM-o 2.6 8B 79.9 53.4 38.5 66.0

Examples

We deploy MiniCPM-o 2.6 on end devices. The demo video is the raw-speed recording on an iPad Pro and a Web demo.


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