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Description
GLM-5.3 is Z.ai’s advanced coding and agentic reasoning model built through scaled post-training on top of the GLM-5.2 base model. The release focuses on frontier coding, long-horizon software engineering, agent tasks, cyber evaluation, and reinforcement learning at scale. GLM-5.3 improves significantly over GLM-5.2 on complex coding benchmarks, real-world engineering environments, Terminal Bench 3.0, DeepSWE, Agents’ Last Exam, and Z.ai’s internal Code Bench. The model is trained on environments that resemble real professional work, including tasks involving codebases, infrastructure, documentation, compute clusters, experiments, bottleneck diagnosis, implementation, testing, and measurable optimization. Z.ai’s post-training stack includes IndexShare for efficient long-context processing, SAO for reinforcement learning on long-horizon tasks, and slime for large-scale asynchronous training. GLM-5.3 supports three thinking effort levels, including low, high, and max, with max recommended for coding tasks. The model also demonstrates emergent cyber capabilities across vulnerability discovery and exploitation benchmarks, prompting continued safety evaluation and hardening before weights are released. GLM-5.3 can be used through the GLM Coding Plan, ZCode, Claude Code, OpenCode, and other coding agent workflows. By combining stronger coding performance, long-horizon task execution, post-training scale, cyber evaluation, reasoning effort controls, and coding-agent integrations, GLM-5.3 supports advanced developer and research workflows.
Description
Atla's Selene 1 API delivers cutting-edge AI evaluation models, empowering developers to set personalized assessment standards and achieve precise evaluations of their AI applications' effectiveness. Selene surpasses leading models on widely recognized evaluation benchmarks, guaranteeing trustworthy and accurate assessments. Users benefit from the ability to tailor evaluations to their unique requirements via the Alignment Platform, which supports detailed analysis and customized scoring systems. This API not only offers actionable feedback along with precise evaluation scores but also integrates smoothly into current workflows. It features established metrics like relevance, correctness, helpfulness, faithfulness, logical coherence, and conciseness, designed to tackle prevalent evaluation challenges, such as identifying hallucinations in retrieval-augmented generation scenarios or contrasting results with established ground truth data. Furthermore, the flexibility of the API allows developers to innovate and refine their evaluation methods continuously, making it an invaluable tool for enhancing AI application performance.
API Access
Has API
Yes
API Access
Has API
Yes
Integrations
APIFree
Yes
Augment Code
Yes
Claude Code
Yes
ClinePass
Yes
Cosmos
Yes
Dessix
Yes
JavaScript
Yes
JetBrains Junie
Yes
Kotlin
Yes
Ollama
Yes
Integrations
APIFree
No
Augment Code
No
Claude Code
No
ClinePass
No
Cosmos
No
Dessix
No
JavaScript
No
JetBrains Junie
No
Kotlin
No
Ollama
No
Pricing Details
Free
Open source
Free Trial
No
Free Version
Yes
Pricing Details
No price information available.
Free Trial
No
Free Version
Yes
Deployment
Web-Based
Yes
On-Premises
Yes
iPhone App
No
iPad App
No
Android App
No
Windows
Yes
Mac
Yes
Linux
Yes
Chromebook
No
Deployment
Web-Based
Yes
On-Premises
No
iPhone App
No
iPad App
No
Android App
No
Windows
No
Mac
No
Linux
No
Chromebook
No
Customer Support
Business Hours
No
Live Rep (24/7)
No
Online Support
Yes
Customer Support
Business Hours
Yes
Live Rep (24/7)
No
Online Support
Yes
Types of Training
Training Docs
Yes
Webinars
No
Live Training (Online)
No
In Person
No
Types of Training
Training Docs
Yes
Webinars
No
Live Training (Online)
Yes
In Person
Yes
Vendor Details
Company Name
Z.ai
Founded
2023
Country
China
Website
z.ai/
Vendor Details
Company Name
atla
Country
United Kingdom
Website
www.atla-ai.com/api