GLM-4.5 (Reasoning)
Z AI • text
GLM-4.5 is our latest flagship foundation model, purpose-built for agent-based applications. It leverages a Mixture-of-Experts (MoE) architecture and supports a context length of up to 128k tokens. GLM-4.5 delivers significantly...
Specifications
Context Window
131K tokens
Input Price/1M
$0.60
Output Price/1M
$2.20
Parameters
—
Speed
55 tok/s
Latency (TTFT)
1.1s
Max Output
98K tokens
Benchmarks
GLM-4.5 (Reasoning) results on the main AI model evaluation benchmarks. Higher scores indicate better performance.
Agentic
| Benchmark | Score | Maximum | Methodology |
|---|---|---|---|
| Terminal-Bench Hard | 22.0 | 100.0 | — |
Coding
| Benchmark | Score | Maximum | Methodology |
|---|---|---|---|
| LiveCodeBench | 74.0 | 100.0 | Artificial Analysis official API |
| SciCode | 35.0 | 100.0 | — |
| AA Coding Index | 26.3 | 100.0 | Artificial Analysis official API |
Knowledge
| Benchmark | Score | Maximum | Methodology |
|---|---|---|---|
| MMLU-Pro | 84.0 | 100.0 | — |
Long Context
| Benchmark | Score | Maximum | Methodology |
|---|---|---|---|
| AA-LCR | 48.0 | 100.0 | — |
Math
| Benchmark | Score | Maximum | Methodology |
|---|---|---|---|
| MATH-500 | 97.9 | 100.0 | Artificial Analysis official API |
| AIME 2025 | 74.0 | 100.0 | Artificial Analysis official API |
| AA Math Index | 73.7 | 100.0 | Artificial Analysis official API |
overall
| Benchmark | Score | Maximum | Methodology |
|---|---|---|---|
| AA Intelligence Index | 26.4 | 100.0 | Artificial Analysis official API |
Reasoning
| Benchmark | Score | Maximum | Methodology |
|---|---|---|---|
| MMLU Pro | 83.5 | 100.0 | Artificial Analysis official API |
| GPQA Diamond | 78.0 | 100.0 | Artificial Analysis official API |
| IFBench | 44.0 | 100.0 | — |
| HLE | 12.0 | 100.0 | — |
Tool Use
| Benchmark | Score | Maximum | Methodology |
|---|---|---|---|
| Tau²-Bench | 43.0 | 100.0 | — |
Information
- Release date
- July 28, 2025
- Tool Calling
- ✅ Supported
- Vision
- ❌ Not supported
- Audio
- ❌ Not supported
Full Analysis: GLM-4.5 (Reasoning)
What is GLM-4.5 (Reasoning)?
GLM-4.5 (Reasoning) is an AI model developed by Z AI, classified as a text model. It focuses on text processing and natural language generation. As a proprietary model, it is available via Z AI's cloud API. With a context window of 131K tokens, it is suitable for processing long documents such as contracts, books, and complete codebases.
Pricing & Costs in 2026
GLM-4.5 (Reasoning) is usage-based, priced at $0.6/1M input tokens and $2.2/1M output tokens. For context: 1 million tokens is approximately 750,000 words, or about 10 average-length books. At this aggressive price point, it is one of the most cost-effective options on the market, ideal for high-volume applications like chatbots, bulk document analysis, and automation.
Benchmarks & Performance
GLM-4.5 (Reasoning) was evaluated on 15 different benchmarks, covering categories like Agentic, Coding, Knowledge, Long Context, Math, overall, Reasoning, Tool Use. Results show exceptional performance across available evaluations.
It's important to note that benchmarks measure specific aspects and don't capture the full user experience. Factors like instruction adherence, behavior in long conversations, and real-world task quality vary significantly between models and aren't always reflected in standard scores.
Recommended Use Cases
GLM-4.5 (Reasoning) specializes in text, offering advanced capabilities for creating and processing text content.
Comparison with Alternatives
In the 2026 AI model ecosystem, GLM-4.5 (Reasoning) competes directly with similarly capable models. Z AI competes in this segment against OpenAI, Anthropic, Google, and Meta. The choice between models depends on the specific use case, budget, latency requirements, and need for features like multimodality and tool calling.
For a detailed side-by-side comparison, use our comparison tool or check the overall model ranking.
Frequently Asked Questions
What is GLM-4.5 (Reasoning)?
GLM-4.5 (Reasoning) is an AI model developed by Z AI. It is a text model.
How much does GLM-4.5 (Reasoning) cost?
GLM-4.5 (Reasoning) costs $0.6/1M input tokens and $2.2/1M output tokens. For heavy usage (e.g., a chatbot handling 100k messages/month), costs can range from $10 to $1,000 depending on volume.
How does GLM-4.5 (Reasoning) compare with other models?
In available benchmarks, GLM-4.5 (Reasoning) scored: Terminal-Bench Hard: 22/100, LiveCodeBench: 74/100, SciCode: 35/100. See the full table above for a detailed comparison.
Is GLM-4.5 (Reasoning) open source?
No, GLM-4.5 (Reasoning) is a proprietary model from Z AI. It is available via cloud API. For open source alternatives, check our open source model ranking.
What is GLM-4.5 (Reasoning) best for?
GLM-4.5 (Reasoning) excels at general-purpose language tasks. With its large context window, it handles long documents, codebases, and extended conversations. It supports tool calling for API integrations and automation.
Last updated: June 01, 2026 • View methodology →