Efficient Sparse Inference With Selective Expert Activation

Snowflake's 480B MoE model for enterprise data tasks.

Unique: Hybrid dense-MoE architecture (10B dense + 128 experts, 17B active per token) enabling selective expert activation that reduces inference cost compared to dense models while maintaining enterprise task optimization that generic sparse models lack

vs others: More efficient than dense 70B+ models due to sparse activation (17B vs. 70B active parameters), while more specialized than general-purpose MoE models like Mixtral that lack enterprise SQL/code optimization

via “sparse mixture-of-experts architecture with 37b active parameters”

Open-source reasoning model matching OpenAI o1.

Unique: Uses sparse MoE with 37B active parameters out of 671B total, reducing per-token compute compared to dense models while maintaining frontier reasoning capability. Specific routing and load balancing mechanisms are proprietary/undocumented.

vs others: More efficient than dense models of equivalent capability (e.g., 70B dense) due to sparse activation, but exact latency/throughput improvements are undocumented.

via “efficient-inference-via-vllm-megablocks”

Mistral's mixture-of-experts model with efficient routing.

Unique: Integrates with vLLM and Megablocks CUDA kernels specifically optimized for sparse mixture-of-experts computation, enabling inference throughput equivalent to 12.9B dense model while maintaining 46.7B parameter capacity. Custom CUDA kernels avoid computing inactive expert parameters, reducing memory bandwidth and compute requirements.

vs others: Achieves 6x faster inference than Llama 2 70B through Megablocks CUDA kernel optimization of sparse routing, whereas dense models must compute all parameters regardless of task complexity, making Mixtral significantly more efficient for production inference.

via “mixture-of-experts sparse activation for efficient inference”

671B MoE model matching GPT-4o at fraction of training cost.

Unique: DeepSeekMoE architecture combines sparse expert routing with Multi-Head Latent Attention (MLA) to achieve 37B active parameters per token from 671B total, reducing inference cost by ~5.5x compared to dense 671B models while maintaining GPT-4o-level performance

vs others: More efficient than Mixtral 8x22B (176B total, ~39B active) and Llama 3.1 405B (dense) by achieving comparable performance with lower active parameter count and training cost ($5.5M vs estimated $10M+ for dense models)

via “sparse-mixture-of-experts-text-generation”

Mistral's mixture-of-experts model with 176B total parameters.

Unique: Uses 8 independent 22B-parameter experts with dynamic per-token routing (2 active experts) instead of dense transformer layers, achieving 44B active parameters from 176B total — a 25% sparsity ratio that reduces inference cost while maintaining parameter capacity for complex reasoning. This sparse activation pattern is fundamentally different from dense models like Llama 70B, which activate all parameters for every token.

vs others: Faster inference than dense 70B models (sparse activation advantage) while maintaining comparable reasoning quality; more parameter-efficient than dense alternatives but requires specialized inference infrastructure unlike standard dense transformers.

via “sparse-mixture-of-experts code generation with selective parameter activation”

DeepSeek's 236B MoE model specialized for code.

Unique: Uses DeepSeekMoE framework with dynamic router-based expert selection to activate only 21B/236B parameters per token, achieving 90.2% HumanEval performance while reducing inference memory by ~60% compared to dense 236B models through sparse activation patterns

vs others: Outperforms Llama-2-70B and Code-Llama-70B on HumanEval (90.2% vs 81.8% and 85.5%) while using 3.3x fewer active parameters, and matches GPT-4-Turbo performance with open-source weights and permissive licensing

via “sparse-mixture-of-experts token-level inference”

Gemma 4 26B A4B IT is an instruction-tuned Mixture-of-Experts (MoE) model from Google DeepMind. Despite 25.2B total parameters, only 3.8B activate per token during inference — delivering near-31B quality at...

Unique: Achieves 31B-equivalent quality through dynamic sparse routing at token granularity, activating only 15% of parameters per token. Unlike dense models or static MoE designs, uses learned gating that adapts routing decisions per input, enabling both efficiency and expressiveness without requiring model-specific quantization or distillation.

vs others: Delivers better quality-per-compute than Llama 2 70B or Mistral 8x7B MoE while maintaining lower inference cost than dense 30B models, due to Google's proprietary expert balancing and routing optimization.

via “sparse mixture-of-experts text generation with selective parameter activation”

Step 3.5 Flash is StepFun's most capable open-source foundation model. Built on a sparse Mixture of Experts (MoE) architecture, it selectively activates only 11B of its 196B parameters per token....

Unique: Uses a 196B parameter sparse MoE architecture that activates only 11B parameters per token through learned gating, achieving dense-model capability with sparse-model efficiency. This differs from dense models (which activate all parameters) and from other MoE implementations by optimizing the expert routing mechanism specifically for language understanding and generation tasks.

vs others: Delivers comparable reasoning quality to dense 70B+ models while requiring 60-70% less compute per inference token than dense alternatives, making it faster and cheaper than GPT-4 or Llama 2 70B for equivalent capability levels.

via “efficient-code-generation-with-sparse-activation”

MiniMax-M2.1 is a lightweight, state-of-the-art large language model optimized for coding, agentic workflows, and modern application development. With only 10 billion activated parameters, it delivers a major jump in real-world...

Unique: Uses sparse mixture-of-experts with 10B activated parameters instead of dense 70B+ models, achieving sub-500ms latency through selective expert routing while maintaining competitive code quality across 40+ languages

vs others: Faster and cheaper than Copilot or Claude for code generation due to sparse activation, but may sacrifice nuance on complex multi-file refactoring compared to dense 70B+ models

via “efficient inference via sparse expert routing”

MiniMax-M2 is a compact, high-efficiency large language model optimized for end-to-end coding and agentic workflows. With 10 billion activated parameters (230 billion total), it delivers near-frontier intelligence across general reasoning,...

Unique: Implements conditional computation through expert routing that activates only 10B of 230B parameters per token, reducing inference cost and latency compared to dense models while maintaining competitive output quality through specialized expert pathways

vs others: Achieves 60-70% inference cost reduction vs 70B dense models while maintaining comparable quality through expert specialization; more efficient than full-scale frontier models (GPT-4, Claude) for cost-sensitive production deployments

via “sparse mixture-of-experts inference optimization”

DeepSeek R1 is here: Performance on par with [OpenAI o1](/openai/o1), but open-sourced and with fully open reasoning tokens. It's 671B parameters in size, with 37B active in an inference pass....

Unique: Implements sparse mixture-of-experts with 37B active parameters out of 671B total, reducing inference cost and latency compared to dense models while maintaining o1-level reasoning performance. This architectural choice enables self-hosting on mid-range GPU infrastructure that would be insufficient for equivalent dense models.

vs others: More efficient than dense 671B models (requiring 1.3TB VRAM) and more capable than smaller dense models (70B-405B), offering a sweet spot for organizations balancing reasoning quality with infrastructure constraints.

via “sparse mixture-of-experts conditional computation routing”

The Qwen3.5 series 397B-A17B native vision-language model is built on a hybrid architecture that integrates a linear attention mechanism with a sparse mixture-of-experts model, achieving higher inference efficiency. It delivers...

Unique: Implements sparse MoE with learned routing gates that selectively activate expert subnetworks per token, reducing active parameter count during inference while maintaining 397B total capacity for diverse task specialization

vs others: More efficient than dense 397B models (which activate all parameters per token) and more capable than smaller dense models of equivalent inference cost, through conditional expert activation

via “sparse-mixture-of-experts reasoning with selective parameter activation”

Qwen3-235B-A22B-Thinking-2507 is a high-performance, open-weight Mixture-of-Experts (MoE) language model optimized for complex reasoning tasks. It activates 22B of its 235B parameters per forward pass and natively supports up to 262,144...

Unique: Uses learned gating mechanisms to route tokens to 22B active experts from a 235B total pool, implementing true sparse MoE rather than dense-with-pruning approaches. The A22B designation indicates Alibaba's specific expert configuration and routing strategy, which differs from standard MoE implementations in how experts are specialized and load-balanced.

vs others: Achieves 235B-parameter reasoning quality at ~10% of dense inference cost compared to Llama 405B or GPT-4, while maintaining faster latency than dense models through selective expert activation

via “efficient-sparse-inference-with-mixture-of-experts”

LFM2-24B-A2B is the largest model in the LFM2 family of hybrid architectures designed for efficient on-device deployment. Built as a 24B parameter Mixture-of-Experts model with only 2B active parameters per...

Unique: LFM2-24B-A2B implements a hybrid MoE architecture with only 2B active parameters per token, achieving 8x parameter efficiency compared to dense 24B models while maintaining reasoning quality through specialized expert routing. This design specifically targets on-device deployment where memory bandwidth and compute are bottlenecks, using learned gating to dynamically select relevant experts rather than static pruning.

vs others: More parameter-efficient than dense 24B models (Llama 2 24B, Mistral 24B) with lower latency and memory footprint, while maintaining competitive quality through expert specialization; more capable than 7B dense models due to larger total parameter capacity despite sparse activation.

via “mixture-of-experts inference with sparse activation”

gpt-oss-20b is an open-weight 21B parameter model released by OpenAI under the Apache 2.0 license. It uses a Mixture-of-Experts (MoE) architecture with 3.6B active parameters per forward pass, optimized for...

Unique: Uses a 21B parameter MoE architecture with only 3.6B active parameters per forward pass, achieving dense-model capability with sparse-model efficiency through learned expert routing — distinct from dense models like Llama 2 70B and from other MoE implementations like Mixtral that use different expert counts and gating strategies

vs others: Offers better inference efficiency than dense 20B models (lower latency, memory) while maintaining OpenAI training quality, and provides open-weight licensing (Apache 2.0) unlike proprietary GPT-4 variants

via “mixture-of-experts reasoning with sparse activation”

gpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. It activates 5.1B parameters per forward pass and is optimized...

Unique: OpenAI's proprietary MoE gating and load-balancing mechanism optimized for agentic reasoning, activating 5.1B of 117B parameters per forward pass with specialized expert routing designed specifically for multi-step decision-making rather than general-purpose dense inference

vs others: Achieves 4.4x parameter efficiency vs. dense 120B models (5.1B active vs. 120B) while maintaining reasoning capability superior to smaller dense models, with OpenAI's production-grade expert balancing preventing the expert collapse and load imbalance issues common in open-source MoE implementations

via “mixture-of-experts instruction following with sparse activation”

Qwen3-30B-A3B-Instruct-2507 is a 30.5B-parameter mixture-of-experts language model from Qwen, with 3.3B active parameters per inference. It operates in non-thinking mode and is designed for high-quality instruction following, multilingual understanding, and...

Unique: Uses a gated mixture-of-experts architecture with 3.3B active parameters per token (11% sparsity) rather than dense 30B activation, achieving dense-model knowledge breadth with sparse-model inference efficiency. The A3B variant specifically optimizes the expert routing and load balancing for instruction-following tasks.

vs others: More cost-efficient than dense 30B models (Llama 3 30B, Mistral Large) for instruction-following while maintaining comparable quality; faster inference than full-parameter MoE models like Mixtral 8x22B due to lower active parameter count.

via “sparse-mixture-of-experts instruction following”

Mixtral 8x7B Instruct is a pretrained generative Sparse Mixture of Experts, by Mistral AI, for chat and instruction use. Incorporates 8 experts (feed-forward networks) for a total of 47 billion...

Unique: Uses learned sparse routing to activate only 2 of 8 experts per token, reducing compute from 47B to ~13B active parameters while maintaining instruction-following quality through expert specialization and dynamic load balancing

vs others: Achieves 70B-class instruction quality at ~3x lower inference cost than dense models like Llama 2 70B by leveraging sparse expert routing, making it faster and cheaper for production instruction-following workloads

via “efficient batch inference with dynamic expert routing”

The Qwen3.5 native vision-language series Plus models are built on a hybrid architecture that integrates linear attention mechanisms with sparse mixture-of-experts models, achieving higher inference efficiency. In a variety of...

Unique: Sparse MoE architecture with learned gating functions routes tokens to specialized experts rather than activating full model capacity, reducing per-token FLOPs while maintaining model quality. Routing decisions are input-aware, allowing different expert combinations for text-only vs. image-heavy vs. video inputs.

vs others: Achieves lower inference cost and latency than dense models like GPT-4 or Claude 3.5 for mixed-modality workloads by selectively activating only necessary expert capacity, while maintaining competitive accuracy through specialized expert training.

via “sparse-mixture-of-experts instruction following”

Mistral's official instruct fine-tuned version of [Mixtral 8x22B](/models/mistralai/mixtral-8x22b). It uses 39B active parameters out of 141B, offering unparalleled cost efficiency for its size. Its strengths include: - strong math, coding,...

Unique: Uses a learned sparse gating mechanism to activate only 2 of 8 experts per token, achieving 39B active parameters with full 141B parameter capacity available for diverse domains. This is architecturally distinct from dense models and from other MoE approaches that may use fixed routing or different expert counts.

vs others: Delivers 70B-class instruction-following quality at 13B-class inference cost and latency, outperforming dense 13B models on math/code while being 5-10x cheaper than running a full 70B model.