GLM-5.1 vs Grok Build 0.1
Compare GLM-5.1 and Grok Build 0.1 side-by-side. See comparisons of price, response speed, accuracy, and file support to choose the best model for your task.
Overview
GLM-5.1 vs Grok Build 0.1 Overview
Everything you need to know about these AI models, including capabilities, performance, pricing, and technical details.
Z AI / GLM-5.1
proDescription
Z.ai's model for agentic engineering, built to keep working rather than answer quickly. Z.ai says GLM-5.1 can run autonomously on a single task for up to eight hours, planning, executing, and revising as it goes. Strong on coding, office documents, and creative writing. Text only, with no image input, and a context window smaller than the largest frontier models. Open weights under an MIT licence.
xAI / Grok Build 0.1
proDescription
xAI's coding model, purpose-built for autonomous software engineering rather than chat. Grok Build 0.1 acts as an engineering agent: it reasons through a problem, writes code, runs your terminal, checks for errors, and fixes its own mistakes in a loop. It reads text and images, always reasons before answering, and natively supports Model Context Protocol. Built for long-horizon coding that runs with little supervision, at a low cost, tuned for agent loops.
About
About
Capabilities
Capabilities
Comparison
Why Use GLM-5.1 and Grok Build 0.1?
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Z AI / GLM-5.1
proCoding For Hours
Z.ai optimised it for agentic coding, with long-horizon planning, stepwise execution, and course correction mid-task. Suited to real engineering work with several stages and strong dependencies, rather than isolated snippets.
Thinking On Off
Reasoning is enabled by default and can be switched off entirely. Z.ai describes stronger instruction following, richer multi-turn responses, and better long-context understanding than the previous generation.
Mid-Size Context Window
A mid-size context window. Comfortable for long reports, contracts, and codebases, though a fraction of the capacity of the largest frontier models, so very big corpora need splitting.
Documents And Fiction
Z.ai highlights improvements across PowerPoint, Word, PDF, and Excel tasks, with better layout, plus stronger literary expression, plot development, and style control for fiction and copywriting.
Open-Ended Instructions
Z.ai reports stronger performance on open-ended questions, complex instruction-following, and multi-turn interactions, with more complete answers. Well-suited to everyday assistance and multi-stage information work.
Text Only Input
Z.ai's documentation lists GLM-5.1 as text-in, text-out. It does not accept images, audio, or video. Screenshots, diagrams, and scanned pages are outside what it can read.
xAI / Grok Build 0.1
proAutonomous Engineering Agent
Purpose-built to act as an engineering agent, not a code generator. Refactors across a codebase, invokes tools, runs tests, and iterates through multi-step development tasks, picking up your project conventions as it works.
Reasoning Always On
Every response includes structured reasoning before the final output, and effort is not configurable. Built for deliberate, multi-step work rather than instant answers, so it plans before it acts.
Repository-Scale Context
A large context window, roughly 190,000 words, is sufficient to hold a substantial codebase or a long agent history in a single session. Reporting notes no fixed output cap, so it can refactor large files in one go.
Structured Code Output
Supports structured outputs and a JSON schema, so it slots into agent pipelines and developer tooling. Built to produce parseable, tool-ready output rather than long-form prose.
Native MCP And Tool Use
Natively supports Model Context Protocol, so internal knowledge bases, proprietary APIs, and MCP servers plug in directly. Built to work inside existing developer tooling rather than a closed ecosystem.
Text And Image Input
xAI lists text and image input, with text output. Send source code, diagrams, UI mockups, or error screenshots in the same request. Audio and video are not supported.
Why Aymo
Why chat with GLM-5.1 and Grok Build 0.1 on Aymo AI?
Aymo gives you more than access to GLM-5.1 and Grok Build 0.1—it provides a complete multi-model AI workspace designed for productivity.
Compare Responses
See how GLM-5.1 and Grok Build 0.1 performs alongside Claude, Gemini, Grok, and other leading AI models.
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