GLM-5.1: The Next-Generation Flagship Model for Agentic Engineering
GLM-5.1: Moving from Vibe Coding to Agentic Engineering
GLM-5.1 is our next-generation flagship model specifically engineered for Agentic Engineering. Compared to its predecessor, GLM-5.1 delivers a quantum leap in coding capabilities and complex engineering tasks, aiming to transform LLMs from simple conversational tools into professional agents capable of independently handling complex software engineering workflows.
Core Evolution: Beyond “First-Pass Performance”
Most models tend to exhaust their repertoire early when tackling complex tasks—applying familiar techniques for quick initial gains and then plateauing. GLM-5.1’s most meaningful leap is its sustained effectiveness over longer horizons.
1. Long-Horizon Reasoning and Self-Iteration
GLM-5.1 does not rely solely on the correctness of a single output; instead, it remains productive over extensive sessions:
- Deep Decomposition: It breaks down ambiguous and complex problems into precise, executable steps.
- Experimentation & Verification: The model runs experiments, analyzes results, and identifies blockers with high precision during execution.
- Dynamic Strategy Revision: By revisiting its reasoning and revising its strategy through repeated iteration, it ensures continuous optimization.
- Scalable Tool Use: It sustains productivity over hundreds of rounds and thousands of tool calls—the longer it runs, the better the result.
2. State-of-the-Art Software Engineering
In the most demanding engineering benchmarks, GLM-5.1 achieves industry-leading performance:
- SWE-Bench Pro: Achieves SOTA performance, demonstrating its ability to resolve real-world software bugs.
- NL2Repo: Leads GLM-5 by a wide margin in repository generation (repo generation) tasks.
- Terminal-Bench 2.0: Shows strong proficiency in real-world terminal tasks, expertly navigating command lines to achieve complex goals.
Performance Benchmarks
GLM-5.1 leads across several high-difficulty benchmarks:
| Dimension | Benchmark | GLM-5.1 Score | Core Capability |
|---|---|---|---|
| Software Engineering | SWE-Bench Pro | 58.4 | Real-world software bug fixing |
| Software Engineering | NL2Repo | 42.7 | Repository-level code generation |
| Terminal Control | Terminal-Bench 2.0 | 63.5 | Real-world terminal interaction |
| Complex Reasoning | HLE (w/ Tools) | 52.3 | High-level logic reasoning with tools |
| Mathematics | AIME 2026 | 95.3 | Competition-level math problem solving |
| Web Browsing | BrowseComp (w/ Context) | 79.3 | Complex web information retrieval |
Deployment & Integration
To facilitate rapid adoption, GLM-5.1 is supported by several leading open-source deployment frameworks:
- SGLang (v0.5.10+)
- vLLM (v0.19.0+)
- xLLM (v0.8.0+)
- Transformers (v0.5.3+)
- KTransformers (v0.5.3+)
Resources: