# GLM-5.1: Affordable Model for Coding Tasks Matching Claude Opus
Z.ai's GLM-5.1 model is now available to all Coding Plan users. Internal tests show a performance of 45.3 points on the coding benchmark—close to Claude Opus 4.6 (47.9) and significantly higher than GLM-5 (35.4). This update strengthens the model's position in code generation and refactoring tasks.
Z.ai Benchmark Details
The benchmark was run using Claude Code as the harness: models were evaluated on an undisclosed set of programming tasks. The scoring methodology is internal, with no public details on tasks or criteria. Such metrics are suitable for relative comparisons in a single environment but do not replace independent external tests.
| Model | Ball |
|--------------|------|
| Claude Opus 4.6 | 47.9 |
| GLM-5.1 | 45.3 |
| GLM-5 | 35.4 |
The 12-point gap between GLM-5 and GLM-5.1 indicates optimizations in architecture or training focused on coding.
Practical Application in Development
GLM-5.1 is suitable for scenarios requiring a balance of price and quality:
- Generating boilerplate code and snippets in IDEs.
- Refactoring legacy code while preserving context.
- Automating routine tasks via API integrations.
- Testing edge cases in CLI environments.
Z.ai subscription limits: the basic plan for $10 provides 3x more requests than Claude Code; the $30 plan provides 15x more. This is relevant for mid-level/senior developers with high usage volumes.
In real projects, models may encounter issues: infinite loops in agents (observed with GLM-5 and Gemini 3 Pro), loss of context in large repositories. Production task tests are required.
Advantages of Chinese LLMs for Enterprise
API access without VPN is a key factor for corporate networks with whitelists. Z.ai, MiniMax, and similar services work through standard channels without blocks. This simplifies integration into CI/CD pipelines and IDE plugins (e.g., GoLand).
Comparison with the GPT series: by subjective assessments, GLM-5.1 is equivalent to GPT-5.2 in thinking tasks, but with better limits. Stability is lower in complex agents—quota monitoring is recommended.
Key Points
- GLM-5.1 narrows the gap with leading coding LLMs to 2.6 points on the internal benchmark.
- Z.ai subscription offers 3–15x higher limits than Claude at a lower price.
- VPN-free access makes the model convenient for restricted networks.
- Independent tests are needed to verify edge cases.
- The competitive coding LLM market drives improvements in OpenAI/Anthropic alternatives.
— Editorial Team
No comments yet.