Extended Context Reasoning With Sparse Activation

via “128k token context window for multi-document reasoning”

Meta's multimodal 11B model with text and vision.

Unique: 128K context window on a compact 11B model enables multi-document reasoning without retrieval-augmented generation (RAG) complexity. Supports extended conversations where image context persists across multiple turns, unlike models with shorter context windows requiring explicit context re-injection.

vs others: Larger context window than many 7B-13B models (typically 4K-32K) enables longer document analysis and richer conversational history without RAG infrastructure, while remaining smaller than 70B+ models with similar context sizes.

via “extended context window inference with 200k token support”

01.AI's bilingual 34B model with 200K context option.

Unique: Provides 200K context window variant alongside 4K base, likely using position interpolation or similar techniques to extend context without full retraining. Enables single-pass processing of entire documents and long conversations without summarization or chunking overhead.

vs others: Matches Claude 3's 200K context capability at 1/3 the parameter count (34B vs 100B+), reducing inference cost and latency while maintaining competitive long-context reasoning for document analysis and multi-turn conversations.

via “extended context window reasoning with 128k token capacity”

xAI's model with real-time X platform data access.

Unique: 128K context window with efficient attention mechanisms allows Grok-2 to maintain coherent reasoning across entire codebases or documents without truncation, using architectural optimizations (likely sparse attention or hierarchical processing) that balance capacity with inference speed

vs others: Matches Claude 3.5 Sonnet's 200K context but with faster inference latency; exceeds GPT-4o's 128K window and provides better cost efficiency for long-context tasks due to xAI's optimized attention implementation

via “extended context reasoning with 200k token window”

Cost-efficient reasoning model with configurable effort levels.

Unique: Combines 200K context window with reasoning-grade intelligence, enabling full-codebase analysis without retrieval or chunking — most alternatives (GPT-4, Claude) offer similar window sizes but lack reasoning-grade depth for code understanding

vs others: Larger context window than o1 (128K) and comparable to Claude 3.5 Sonnet (200K), but with reasoning-grade capabilities that alternatives lack for complex code analysis

via “multi-modal reasoning with 256k context window”

Grok 4 is xAI's latest reasoning model with a 256k context window. It supports parallel tool calling, structured outputs, and both image and text inputs. Note that reasoning is not...

Unique: 256k context window combined with native multi-modal input (text + images) in a single reasoning pass, enabling visual-textual reasoning without separate encoding steps or context switching

vs others: Larger context window than Claude 3.5 Sonnet (200k) and GPT-4o (128k) with integrated image reasoning, reducing the need for external vision preprocessing

via “long-context token processing with efficient attention”

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: Combines sparse MoE routing with efficient attention (likely GQA), allowing long-context processing without proportional parameter activation. Only relevant experts activate for each token, even in 8K+ sequences, reducing both memory footprint and latency compared to dense long-context models.

vs others: Processes 8K-token contexts 2-3x faster than Llama 2 70B while using 1/3 the active parameters, making long-context inference practical on standard GPU infrastructure without specialized hardware.

via “reasoning-aware context window management”

Gemini 2.5 Flash-Lite is a lightweight reasoning model in the Gemini 2.5 family, optimized for ultra-low latency and cost efficiency. It offers improved throughput, faster token generation, and better performance...

Unique: Uses reasoning-aware hierarchical summarization that preserves logical chains and entity relationships rather than generic importance scoring, enabling coherent reasoning across 1M-token contexts without losing critical inference paths

vs others: Handles longer contexts more efficiently than Claude 3.5 Sonnet (200K tokens) because hierarchical summarization preserves reasoning structure while reducing memory overhead, enabling 1M-token reasoning at lower cost

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 “1-million-token context window reasoning”

Qwen Plus 0728, based on the Qwen3 foundation model, is a 1 million context hybrid reasoning model with a balanced performance, speed, and cost combination.

Unique: Hybrid reasoning architecture that extends context to 1M tokens while maintaining inference speed through sparse attention and hierarchical token processing, rather than naive full-attention scaling used by some competitors

vs others: Offers 4x larger context window than GPT-4 Turbo (128K) at lower cost, with hybrid reasoning optimized for balanced speed-accuracy tradeoff rather than pure reasoning depth like o1

via “long-context reasoning with 922k input tokens”

GPT-5.4 Pro is OpenAI's most advanced model, building on GPT-5.4's unified architecture with enhanced reasoning capabilities for complex, high-stakes tasks. It features a 1M+ token context window (922K input, 128K...

Unique: Unified 922K input token window using hierarchical sparse attention instead of retrieval-augmented generation (RAG) or sliding-window approaches, eliminating context fragmentation while maintaining reasoning coherence across document-length inputs

vs others: Outperforms Claude 3.5 Sonnet (200K context) and Gemini 2.0 (1M but with degraded reasoning) by combining maximum context with GPT-5.4's enhanced reasoning architecture, reducing latency vs. chunking-based RAG systems by 40-60%

via “long-context reasoning with extended token windows”

GPT-5.2 Pro is OpenAI’s most advanced model, offering major improvements in agentic coding and long context performance over GPT-5 Pro. It is optimized for complex tasks that require step-by-step reasoning,...

Unique: Implements hierarchical context compression and sparse attention patterns specifically optimized for 200K+ token windows, maintaining coherence across document boundaries where competing models degrade significantly

vs others: Outperforms Claude 3.5 Sonnet and Gemini 2.0 on long-context tasks by maintaining semantic fidelity across extended windows while keeping latency under 60 seconds for typical enterprise use cases

via “long-context reasoning with 1m token window”

GPT-4.1 Mini is a mid-sized model delivering performance competitive with GPT-4o at substantially lower latency and cost. It retains a 1 million token context window and scores 45.1% on hard...

Unique: Achieves 1M context window with sub-second per-token latency through optimized attention patterns (likely using ring attention or similar sparse mechanisms) rather than naive full attention, enabling practical use of the full window without prohibitive latency

vs others: Supports 10x larger context than GPT-4o (128K) and 4x larger than Claude 3.5 Sonnet (200K) at lower cost per token, eliminating need for RAG systems for many document analysis tasks

via “extended-context-reasoning-with-sparse-activation”

Tongyi DeepResearch is an agentic large language model developed by Tongyi Lab, with 30 billion total parameters activating only 3 billion per token. It's optimized for long-horizon, deep information-seeking tasks...

Unique: Uses a 30B parameter MoE architecture with 3B active parameters per token, a design choice that balances reasoning capability with inference efficiency. This is distinct from dense 30B models and from smaller 7B-13B models — it achieves reasoning depth closer to 30B while maintaining latency closer to 7B.

vs others: More efficient than dense 30B models for long-horizon tasks (lower latency, lower memory), and more capable than 7B-13B models for complex reasoning, making it a sweet spot for research-heavy applications.

via “cost-optimized inference with sparse activation”

May 28th update to the [original DeepSeek R1](/deepseek/deepseek-r1) 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...

Unique: Sparse activation architecture (37B active of 671B total) enables o1-equivalent reasoning quality at significantly lower computational cost than dense models. This contrasts with o1 which uses dense inference, and with standard sparse models which lack reasoning capabilities.

vs others: Provides better cost-per-reasoning-quality ratio than o1 or dense 671B models; enables deployment on smaller infrastructure than alternatives while maintaining reasoning depth.

via “extended-context reasoning with 262k token window”

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: Implements 262K context through position interpolation combined with MoE sparse routing, allowing long-context reasoning without the full computational cost of dense 235B inference. The sparse activation means attention computation is still bounded by expert routing decisions, not full quadratic scaling.

vs others: Supports 64x longer context than GPT-4 Turbo (4K) and 6x longer than Claude 3.5 Sonnet (200K) while maintaining faster inference through sparse MoE activation

via “sparse-attention-based long-context reasoning”

DeepSeek-V3.2 is a large language model designed to harmonize high computational efficiency with strong reasoning and agentic tool-use performance. It introduces DeepSeek Sparse Attention (DSA), a fine-grained sparse attention mechanism...

Unique: DeepSeek Sparse Attention (DSA) uses learned fine-grained sparsity patterns rather than fixed sparse structures (e.g., local windows or strided patterns), allowing the model to identify semantically relevant token pairs during training and apply those patterns consistently at inference

vs others: More computationally efficient than dense attention models like GPT-4 or Claude for long contexts, while maintaining stronger reasoning than models using fixed sparse patterns like Longformer or BigBird

via “extended-context reasoning with 1m token window”

Qwen Plus 0728, based on the Qwen3 foundation model, is a 1 million context hybrid reasoning model with a balanced performance, speed, and cost combination.

Unique: Qwen Plus 0728 combines a 1M token context window with explicit thinking/reasoning tokens, allowing the model to allocate computational budget to complex reasoning tasks within a single request rather than requiring multi-step decomposition. The hybrid approach uses sparse attention and efficient KV-cache to avoid quadratic scaling while maintaining full context accessibility.

vs others: Supports 10x larger context than GPT-4 Turbo (128K) and matches Claude 3.5 Sonnet's context window while offering faster inference and lower cost through optimized sparse attention patterns

via “sparse-attention-based long-context reasoning”

DeepSeek-V3.2-Exp is an experimental large language model released by DeepSeek as an intermediate step between V3.1 and future architectures. It introduces DeepSeek Sparse Attention (DSA), a fine-grained sparse attention mechanism...

Unique: DeepSeek Sparse Attention (DSA) uses learned, fine-grained token importance scoring during training to create task-adaptive sparse patterns, rather than fixed sparsity strategies (e.g., local windows or strided patterns) used by competitors. This enables selective attention to semantically relevant tokens across the full sequence.

vs others: Achieves longer effective context windows than Claude 3.5 Sonnet (200K) with lower inference latency due to sparse computation, while maintaining reasoning quality comparable to dense attention models at shorter contexts.

via “long-context semantic understanding with 128k token window”

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: 128K token context window combined with MoE sparse activation allows efficient processing of long sequences without proportional latency increase, using expert routing to focus computation on relevant context regions rather than applying uniform attention across entire sequence

vs others: Maintains semantic coherence across 128K tokens with lower latency than dense models using full attention, while being cheaper per token than GPT-4 Turbo's 128K context due to sparse activation reducing per-token compute cost

via “long-context text generation with 200k+ token window”

MiniMax-01 is a combines MiniMax-Text-01 for text generation and MiniMax-VL-01 for image understanding. It has 456 billion parameters, with 45.9 billion parameters activated per inference, and can handle a context...

Unique: Achieves 200k+ context window through sparse activation pattern (45.9B of 456B parameters active) combined with efficient attention mechanisms, reducing memory footprint and latency compared to dense models with equivalent context capacity. Architectural choice to use mixture-of-experts-style sparse activation enables longer contexts without proportional compute cost.

vs others: Longer effective context than Claude 3 (200k vs 200k parity) with lower per-token cost due to sparse activation, though potentially slower than Claude for short-context tasks due to routing overhead