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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
GPT-6.2 Astra is an unannounced AI model reportedly being tested by OpenAI as a potential successor to GPT-6 Astra. References to the model identifier have appeared in Codex usage reports shared by users, although OpenAI has not confirmed the model's development or deployment. The model is expected to build on the Astra family's capabilities in advanced reasoning, autonomous software engineering, and complex task execution. Potential programming capabilities include code generation, debugging, repository analysis, automated testing, and software architecture development. Its anticipated reasoning capabilities may support mathematical problem-solving, scientific analysis, technical research, and extended knowledge work. The model could also support agentic workflows that involve planning, interacting with external tools, executing commands, and evaluating results across multiple steps. Improvements in task persistence, instruction following, and reliable tool use may be important development priorities, although no official evaluations have been published. Reported appearances in Codex usage analytics suggest possible experimental integration with OpenAI's coding environment, but general availability has not been established. OpenAI has not released official details about GPT-6.2 Astra's architecture, context window, API access, pricing, safety evaluations, or release date.
API Access
Has API
Yes
API Access
Has API
Yes
Screenshots View All
No images available
Integrations
Amp
Yes
C
Yes
C++
Yes
CSS
Yes
Cursor
Yes
Go
Yes
HTML
Yes
Hermes Agent
Yes
Java
Yes
JavaScript
Yes
Integrations
Amp
Yes
C
Yes
C++
Yes
CSS
Yes
Cursor
Yes
Go
Yes
HTML
Yes
Hermes Agent
Yes
Java
Yes
JavaScript
Yes
Pricing Details
Free
Open source
Free Trial
No
Free Version
Yes
Pricing Details
No price information available.
Free Trial
No
Free Version
No
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
No
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)
No
In Person
No
Vendor Details
Company Name
Z.ai
Founded
2023
Country
China
Website
z.ai/
Vendor Details
Company Name
OpenAI
Founded
2015
Country
United States
Website
openai.com