List of the Top 6 Large Language Models for LlamaIndex in 2026

Muse Spark 1.2 is a coding-focused AI model from Meta designed to support advanced software engineering tasks through Muse Code and the Meta Model API. The model builds on Muse Spark 1.1 with improvements in code generation, complex debugging, codebase understanding, and end-to-end developer workflows. Muse Spark 1.2 powers Muse Code, a terminal coding agent that can plan repository changes, write code, validate outputs, and work across large codebases. Muse Code uses persistent async background agents that stay active throughout a session to reduce redundant information gathering and support difficult multi-step work. The runtime uses a local event log where model calls, tool runs, approvals, and edits are appended, making sessions replay-exact and restart-safe. Muse Spark 1.2 was co-trained with Muse Code so the model can take advantage of its toolset, harness workflows, goals, compaction, and subagent architecture. Meta significantly scaled training compute on coding tasks and expanded training environment diversity to improve the model’s engineering capabilities. The model was also trained on long-horizon coding tasks, including whole-repository generation, large end-to-end projects, auto-research, and extended iterative work. Its training approach uses planning, goal conditioning, context compaction, rejection-sampled harness trajectories, and self-improvement data generated with Muse Spark 1.1. Meta also tested Muse Spark 1.2 on long-running GPU kernel optimization workflows where the model wrote, compiled, profiled, and improved Triton kernels over many tool calls. By combining coding-focused training, agentic runtime integration, persistent subagents, long-horizon reasoning, replay-safe execution, and API availability, Muse Spark 1.2 helps developers and AI agents complete complex software engineering work with less intervention.

Muse Spark 1.1 is an advanced multimodal reasoning model from Meta Superintelligence Labs built for agentic work, coding, computer use, tool calling, and multimodal understanding. It is a major upgrade from Muse Spark and is designed to push the performance-efficiency frontier for AI systems that need to plan, reason, act, and coordinate across complex workflows. The model can operate across external apps, native tools, MCP servers, custom skills, browsers, scripts, images, videos, PDFs, audio, and developer environments. Muse Spark 1.1 is especially strong in agentic orchestration, where it can gather context, make plans, delegate work to parallel subagents, and manage execution across multiple steps. As a subagent, it can follow a defined role, use available tools appropriately, and escalate back to a main agent when needed. Its 1 million token context window helps it remember past actions, retrieve information from earlier in a project, and compact long sessions while keeping important details available for later work. For computer-use tasks, Muse Spark 1.1 can navigate unfamiliar interfaces, adapt to changing requirements, and choose whether to click through an interface or write scripts when automation is faster. In software engineering, the model can diagnose complex bugs, implement new features, perform large code migrations, build web applications, inspect screenshots, trace issues to code, and validate fixes. Its multimodal capabilities allow it to inspect visual and audio information, generate detailed image and video captions, create visual-to-code artifacts, and combine perception with action in practical workflows. Developers can access Muse Spark 1.1 through Meta’s new Model API public preview, and everyday users can try it in Thinking mode in the Meta AI app.

Claude is a powerful AI assistant designed by Anthropic to support problem-solving, creativity, and productivity across a wide range of use cases. It helps users write, edit, analyze, and code by combining conversational AI with advanced reasoning capabilities. Claude allows users to work on documents, software, graphics, and structured data directly within the chat experience. Through features like Artifacts, users can collaborate with Claude to iteratively build and refine projects. The platform supports file uploads, image understanding, and data visualization to enhance how information is processed and presented. Claude also integrates web search results into conversations to provide timely and relevant context. Available on web, iOS, and Android, Claude fits seamlessly into modern workflows. Multiple subscription tiers offer flexibility, from free access to high-usage professional and enterprise plans. Advanced models give users greater depth, speed, and reasoning power for complex tasks. Claude is built with enterprise-grade security and privacy controls to protect sensitive information. Anthropic prioritizes transparency and responsible scaling in Claude’s development. As a result, Claude is positioned as a trusted AI assistant for both everyday tasks and mission-critical work.

Muse Spark is an advanced multimodal AI model developed by Meta Superintelligence Labs, representing a major step toward personal superintelligence. It is built from the ground up to integrate text, images, and tool-based interactions, enabling more dynamic and intelligent responses. The model features visual chain-of-thought reasoning, allowing it to process and explain visual information in a structured way. It also supports multi-agent orchestration, where multiple AI agents collaborate to solve complex problems efficiently. Muse Spark introduces Contemplating mode, which enhances reasoning by enabling parallel agent workflows for higher accuracy and performance. The model demonstrates strong capabilities in areas such as STEM reasoning, health analysis, and real-world problem-solving. It can generate interactive experiences, such as visual annotations, educational tools, and personalized insights. Muse Spark is trained using a combination of advanced pretraining, reinforcement learning, and optimized test-time reasoning strategies. Its architecture focuses on scaling efficiency, achieving strong performance with reduced computational requirements. Safety is a key priority, with built-in safeguards, alignment mechanisms, and robust evaluation processes. The model is available through Meta AI platforms, with API access in limited preview. Overall, Muse Spark represents a significant evolution in AI, moving closer to highly personalized, intelligent assistants that understand and interact with the real world.

CodeQwen acts as the programming equivalent of Qwen, a collection of large language models developed by the Qwen team at Alibaba Cloud. This model, which is based on a transformer architecture that operates purely as a decoder, has been rigorously pre-trained on an extensive dataset of code. It is known for its strong capabilities in code generation and has achieved remarkable results on various benchmarking assessments. CodeQwen can understand and generate long contexts of up to 64,000 tokens and supports 92 programming languages, excelling in tasks such as text-to-SQL queries and debugging operations. Interacting with CodeQwen is uncomplicated; users can start a dialogue with just a few lines of code leveraging transformers. The interaction is rooted in creating the tokenizer and model using pre-existing methods, utilizing the generate function to foster communication through the chat template specified by the tokenizer. Adhering to our established guidelines, we adopt the ChatML template specifically designed for chat models. This model efficiently completes code snippets according to the prompts it receives, providing responses that require no additional formatting changes, thereby significantly enhancing the user experience. The smooth integration of these components highlights the adaptability and effectiveness of CodeQwen in addressing a wide range of programming challenges, making it an invaluable tool for developers.

Jamba has emerged as the leading long context model, specifically crafted for builders and tailored to meet enterprise requirements. It outperforms other prominent models of similar scale with its exceptional latency and features a groundbreaking 256k context window, the largest available. Utilizing the innovative Mamba-Transformer MoE architecture, Jamba prioritizes cost efficiency and operational effectiveness. Among its out-of-the-box features are function calls, JSON mode output, document objects, and citation mode, all aimed at improving the overall user experience. The Jamba 1.5 models excel in performance across their expansive context window and consistently achieve top-tier scores on various quality assessment metrics. Enterprises can take advantage of secure deployment options customized to their specific needs, which facilitates seamless integration with existing systems. Furthermore, Jamba is readily accessible via our robust SaaS platform, and deployment options also include collaboration with strategic partners, providing users with added flexibility. For organizations that require specialized solutions, we offer dedicated management and ongoing pre-training services, ensuring that each client can make the most of Jamba’s capabilities. This level of adaptability and support positions Jamba as a premier choice for enterprises in search of innovative and effective solutions for their needs. Additionally, Jamba's commitment to continuous improvement ensures that it remains at the forefront of technological advancements, further solidifying its reputation as a trusted partner for businesses.