{"id":14426,"date":"2026-05-23T05:09:57","date_gmt":"2026-05-23T05:09:57","guid":{"rendered":"https:\/\/comparateur-ia.io\/outils-ia\/glm-5-1\/"},"modified":"2026-05-23T05:09:57","modified_gmt":"2026-05-23T05:09:57","slug":"glm-5-1","status":"publish","type":"outil_ia","link":"https:\/\/comparateur-ia.io\/en\/outils-ia\/glm-5-1\/","title":{"rendered":"GLM 5.1"},"content":{"rendered":"\n\n<p class=\"tool-description\">GLM-5.1 is the __flagship open source AI model__ by Z.ai, designed for agentic engineering and long-horizon software development. MoE architecture with 754 billion parameters, __200K token__ context, and ability to work autonomously for over eight hours on a task, GLM-5.1 surpasses GPT-5.4 and Claude Opus 4.6 on SWE-Bench Pro. Available under MIT license, the model is used via Z.ai API, OpenRouter, NVIDIA NIM, or self-hosting.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">What is GLM 5.1?<\/h2>\n\n\n\n\n\n<p>GLM-5.1 is the flagship model of the GLM (General Language Model) line developed by Z.ai. It builds on the GLM-4 suite but introduces several major technical breaks. The architecture is a Mixture of Experts called Dense-Sparse-Alternating, totaling 754 billion parameters with partial activation that maintains reasonable inference costs. The model supports 200,000 tokens in context and 128,000 tokens in output. It is specifically designed for agentic engineering tasks, long-horizon software development, code generation, extended reasoning, and tool use. The MIT license allows commercial use, fine-tuning, and self-hosted deployment without restriction.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Key Features<\/h2>\n\n\n\n\n\n<p>GLM-5.1 offers several differentiating features. The explicit thinking mode, or thinking mode, allows the model to reason step-by-step before producing the final answer, improving quality on complex tasks. Native function calling allows invoking external tools, structured output guarantees reliable JSON output, and context caching reduces costs on long conversations. MCP integration is natively supported, facilitating model use in standardized agent architectures. On performance, GLM-5.1 scores 58.4 on SWE-Bench Pro, surpassing GPT-5.4, Claude Opus 4.6, and Gemini 3.1 Pro. On the KernelBench Level 3 benchmark, the model achieves a 3.6x geometric speedup, versus 1.49x for torch.compile. The model is available through multiple channels: Z.ai API, NVIDIA NIM, OpenRouter, Vercel AI Gateway, Hugging Face for weights, and GitHub community for tools.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Use Cases<\/h2>\n\n\n\n\n\n<p>A dev team uses GLM-5.1 to automate massive refactorings on complex codebases, entrusting the model with tasks requiring hours of reasoning. An AI startup uses it to build autonomous agents capable of planning, coding, and testing software end to end. A GPU optimization researcher exploits the model&#8217;s KernelBench capabilities to generate high-performance CUDA kernels. An organization concerned with sovereignty deploys GLM-5.1 self-hosted to process sensitive data without depending on an external provider. An AI product editor integrates GLM-5.1 as the long-horizon reasoning engine in their vertical agent. Finally, university research teams exploit the model&#8217;s total openness to study agent behavior under autonomous execution.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Advantages<\/h2>\n\n\n\n\n\n<p>The main benefit of GLM-5.1 is the rare combination of frontier performance and total openness. Teams get a model at the level of proprietary leaders without contractual lock-in, without vendor dependency, and without fine-tuning limits. The extended 200K token context unlocks use cases on very large codebases without manual chunking. Autonomous long-horizon execution capability reduces the human supervision needed for complex tasks. The MIT license allows the most demanding commercial uses, including in globally distributed SaaS products.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Pricing<\/h2>\n\n\n\n\n\n<p>GLM-5.1 is free under MIT license for weight download and self-hosting. Usage via Z.ai API, OpenRouter, or NVIDIA NIM is billed on usage, with very competitive pricing versus equivalent proprietary models. Z.ai also offers a free chat to test the model directly. For self-hosting, the main investment is the GPU infrastructure needed to serve a MoE model of this size. Multiple cloud partners offer managed inference at predictable rates, suitable for teams that don&#8217;t want to manage infrastructure.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n\n\n<p>GLM-5.1 has established itself as the open source model to beat in the agentic engineering category. Frontier performance, extended context, long-horizon autonomous execution, and MIT license make it an exceptional option for dev teams, AI startups, and sovereignty-conscious organizations. Remaining barriers mainly concern operational complexity at scale.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Strengths<\/h2>\n\n\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>MoE architecture __754B parameters__ with efficient activation<\/li>\n\n<li>__200K token__ context and 128K tokens in output<\/li>\n\n<li>Ability for __autonomous execution__ continuous over 8+ hours<\/li>\n\n<li>__SWE-Bench Pro__ score exceeding GPT-5.4 and Claude Opus 4.6<\/li>\n\n<li>__MIT__ license allowing commercial use without restriction<\/li>\n\n<li>Function calling, structured output, and MCP natively supported<\/li>\n\n<\/ul>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Limitations<\/h2>\n\n\n\n\n\n<ul class=\"wp-block-list\">\n\n<li>Self-hosting very heavy on __GPU__ for full models<\/li>\n\n<li>Product documentation less rich than proprietary __leaders__<\/li>\n\n<li>Performance variable outside __English__ and Chinese on some tasks<\/li>\n\n<li>Observability tools still __young__ for supervising an agent<\/li>\n\n<li>Smaller community than Llama or Mistral at this stage<\/li>\n\n<\/ul>\n\n\n\n\n\n<h2 class=\"wp-block-heading\">Frequently Asked Questions<\/h2>\n\n\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>Is GLM-5.1 really open source?<\/summary>\n\n\n\n<p>Yes, the model is published under MIT license, which allows commercial use, fine-tuning, and redistribution without restriction.<\/p>\n\n\n\n<\/details>\n\n\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>How many parameters does the model have?<\/summary>\n\n\n\n<p>GLM-5.1 uses a Mixture of Experts architecture with 754 billion total parameters, with partial activation per request.<\/p>\n\n\n\n<\/details>\n\n\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What tasks does GLM-5.1 excel at?<\/summary>\n\n\n\n<p>The model is optimized for agentic engineering, code generation, long reasoning, and autonomous execution of complex tasks over multiple hours.<\/p>\n\n\n\n<\/details>\n\n\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>How do you use GLM-5.1?<\/summary>\n\n\n\n<p>Via Z.ai API, NVIDIA NIM API, OpenRouter, Vercel AI Gateway, Hugging Face, or self-hosting if you have GPU infrastructure.<\/p>\n\n\n\n<\/details>\n\n\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>What is the context window?<\/summary>\n\n\n\n<p>GLM-5.1 offers a 200,000 token input window and 128,000 tokens in output.<\/p>\n\n\n\n<\/details>\n\n","protected":false},"excerpt":{"rendered":"<p>GLM-5.1 is Z.ai&#8217;s flagship open source model for agentic engineering and long-horizon autonomous software development.<\/p>\n","protected":false},"author":2,"featured_media":28147,"template":"","meta":{"cia_url_outil":"https:\/\/z.ai\/blog\/glm-5.1","cia_affiliate_url":"https:\/\/z.ai\/blog\/glm-5.1","cia_prix":"Free \/ Paid","cia_devise":"USD","cia_date_test":"","cia_highlight":"Open source MIT AI model capable of coding autonomously for over eight hours.","cia_logo":"\/partners\/glm-5-1.png","cia_og_image":"","cia_partner":"glm-5-1","cia_json_id":"glm-5-1","cia_verdict":"GLM-5.1 marks a major step in __open source models__ catching up to proprietary leaders. The numbers speak for themselves: 754 billion parameter MoE architecture, 200K context, SWE-Bench Pro score surpassing GPT-5.4 and Claude Opus 4.6. But the real differentiator is long-duration __autonomous execution__ capability: Z.ai demonstrates sessions lasting over eight hours where the agent plans, codes, tests, and fixes without human intervention. The __MIT license__ changes the game for teams wanting to fine-tune, deploy internally, or integrate the model into commercial products. A few structural limitations remain: heavy self-hosting, still-young ecosystem, and variable performance outside English. But for AI startups, advanced dev teams, or sovereignty-conscious organizations, GLM-5.1 is probably the __best open source model__ available today for autonomous software development tasks.","cia_avantages":"[\"MoE architecture __754B parameters__ with efficient activation\",\"__200K token__ context and 128K tokens in output\",\"Ability for __autonomous execution__ continuous over 8+ hours\",\"__SWE-Bench Pro__ score exceeding GPT-5.4 and Claude Opus 4.6\",\"__MIT__ license allowing commercial use without restriction\",\"Function calling, structured output, and MCP natively supported\"]","cia_avantages_court":"[\"MoE 754B paramu00e8tres\",\"Contexte 200K tokens\",\"8h d'exu00e9cution autonome\",\"SOTA SWE-Bench Pro\",\"Licence MIT ouverte\"]","cia_inconvenients":"[\"Self-hosting very heavy on __GPU__ for full models\",\"Product documentation less rich than proprietary __leaders__\",\"Performance variable outside __English__ and Chinese on some tasks\",\"Observability tools still __young__ for supervising an agent\",\"Smaller community than Llama or Mistral at this stage\"]","cia_inconvenients_court":"[\"Self-hosting lourd\",\"Documentation light\",\"Multilingue inu00e9gal\",\"Outils encore jeunes\"]","cia_ideal_pour":"[\"u00c9quipes __dev__ produisant des agents IA d'ingu00e9nierie logicielle\",\"Startups cherchant un modu00e8le __open source__ haut de gamme\",\"Chercheurs IA explorant les architectures MoE long-horizon\",\"Organisations soucieuses de __souverainetu00e9__ et de fine-tuning\"]","cia_pas_pour":"[\"Utilisateurs sans compu00e9tences pour __l'API__ ou self-hosting\",\"Cas d'usage tru00e8s __lu00e9gers__ couverts par des modu00e8les plus petits\",\"Projets nu00e9cessitant des SLA stricts sur des modu00e8les propriu00e9taires\",\"u00c9quipes refusant un produit chinois pour conformitu00e9\"]","cia_faq":"[{\"q\":\"Is GLM-5.1 really open source?\",\"a\":\"Yes, the model is published under MIT license, which allows commercial use, fine-tuning, and redistribution without restriction.\"},{\"q\":\"How many parameters does the model have?\",\"a\":\"GLM-5.1 uses a Mixture of Experts architecture with 754 billion total parameters, with partial activation per request.\"},{\"q\":\"What tasks does GLM-5.1 excel at?\",\"a\":\"The model is optimized for agentic engineering, code generation, long reasoning, and autonomous execution of complex tasks over multiple hours.\"},{\"q\":\"How do you use GLM-5.1?\",\"a\":\"Via Z.ai API, NVIDIA NIM API, OpenRouter, Vercel AI Gateway, Hugging Face, or self-hosting if you have GPU infrastructure.\"},{\"q\":\"What is the context window?\",\"a\":\"GLM-5.1 offers a 200,000 token input window and 128,000 tokens in output.\"}]","cia_languages":"[\"en\"]","cia_read_more":"[{\"href\":\"\/comparatifs\/ia-code-developpement\",\"title\":\"Comparatif IA Code & Du00e9veloppement\",\"desc\":\"Notre su00e9lection des meilleurs outils IA pour les du00e9veloppeurs.\"},{\"href\":\"\/comparatifs\/ia-assistants\",\"title\":\"Comparatif Assistants IA\",\"desc\":\"Les meilleurs assistants IA disponibles aujourd'hui.\"},{\"href\":\"\/guides\/alternatives-chatgpt\",\"title\":\"Alternatives u00e0 ChatGPT\",\"desc\":\"Notre guide des meilleures alternatives au chatbot d'OpenAI.\"}]","cia_seo_title":"","cia_seo_description":"","cia_seo_h1":"","cia_review_seo_title":"","cia_review_seo_desc":"","cia_created_at":"2026-05-05","cia_updated_at":"2026-05-05","cia_note_globale":4.8,"cia_note_count":78,"cia_prix_mensuel":0,"cia_ranking":999,"cia_verified":true,"cia_featured":false,"cia_selection":false,"cia_is_affiliate":false,"cia_has_review":true,"cia_trial":true,"cia_langue_fr":false,"cia_api_disponible":false,"footnotes":""},"categorie-ia":[189,177],"tag-ia":[182,190,389,179],"tarification":[14],"niveau-utilisateur":[],"metier":[],"class_list":["post-14426","outil_ia","type-outil_ia","status-publish","has-post-thumbnail","hentry","categorie_ia-assistants","categorie_ia-code-development","tag_ia-agents-autonomes","tag_ia-api","tag_ia-generation-de-code-en","tag_ia-open-source","tarification-gratuit"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - 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