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Description

Claude Sonnet 4.5 represents Anthropic's latest advancement in AI, crafted to thrive in extended coding environments, complex workflows, and heavy computational tasks while prioritizing safety and alignment. It sets new benchmarks with its top-tier performance on the SWE-bench Verified benchmark for software engineering and excels in the OSWorld benchmark for computer usage, demonstrating an impressive capacity to maintain concentration for over 30 hours on intricate, multi-step assignments. Enhancements in tool management, memory capabilities, and context interpretation empower the model to engage in more advanced reasoning, leading to a better grasp of various fields, including finance, law, and STEM, as well as a deeper understanding of coding intricacies. The system incorporates features for context editing and memory management, facilitating prolonged dialogues or multi-agent collaborations, while it also permits code execution and the generation of files within Claude applications. Deployed at AI Safety Level 3 (ASL-3), Sonnet 4.5 is equipped with classifiers that guard against inputs or outputs related to hazardous domains and includes defenses against prompt injection, ensuring a more secure interaction. This model signifies a significant leap forward in the intelligent automation of complex tasks, aiming to reshape how users engage with AI technologies.

Description

Ox Alpha is an anonymous frontier-style reasoning model that emerged in August 2026 with a strong focus on software engineering and agentic AI applications. The organization responsible for developing the model has not publicly identified itself, and the model initially appeared under the identifier stealth/ox-alpha. It is built to reason through difficult problems rather than simply produce short conversational responses. Ox Alpha provides a 1,048,576-token context window, giving it enough capacity to process very large code repositories, documents, specifications, and conversation histories in a single context. Its maximum output length reaches 131,072 tokens, enabling unusually long and detailed responses when needed. The model can process text, images, and video as inputs while returning text-based results. Developers can use tool calling and structured JSON output to connect Ox Alpha with applications, APIs, and autonomous agent workflows. Its capabilities are particularly suited to long-running coding tasks such as debugging, refactoring, architecture analysis, and reasoning across multiple files without quickly losing context. Ox Alpha has attracted attention from developers because of its combination of large-context reasoning, multimodal input, agentic features, and currently anonymous origins.

API Access

Has API

API Access

Has API

Screenshots View All

Screenshots View All

No images available

Integrations

Cheaper Inference
OpenClaw
.NET
APIFree
CSS
Clojure
Dessix
F#
GitHub Copilot CLI
Google Antigravity
IntelliJ IDEA
JetBrains Junie
Julia
Lorka
Muses
OpenRouter
Thesys Agent Builder
TypeScript
Xcode
Zo Computer

Integrations

Cheaper Inference
OpenClaw
.NET
APIFree
CSS
Clojure
Dessix
F#
GitHub Copilot CLI
Google Antigravity
IntelliJ IDEA
JetBrains Junie
Julia
Lorka
Muses
OpenRouter
Thesys Agent Builder
TypeScript
Xcode
Zo Computer

Pricing Details

No price information available.
Free Trial
Free Version

Pricing Details

$0 per 1M tokens
Free Trial
Free Version

Deployment

Web-Based
On-Premises
iPhone App
iPad App
Android App
Windows
Mac
Linux
Chromebook

Deployment

Web-Based
On-Premises
iPhone App
iPad App
Android App
Windows
Mac
Linux
Chromebook

Customer Support

Business Hours
Live Rep (24/7)
Online Support

Customer Support

Business Hours
Live Rep (24/7)
Online Support

Types of Training

Training Docs
Webinars
Live Training (Online)
In Person

Types of Training

Training Docs
Webinars
Live Training (Online)
In Person

Vendor Details

Company Name

Anthropic

Founded

2021

Country

United States

Website

claude.ai

Vendor Details

Company Name

Ox Alpha

Website

openrouter.ai/compare/stealth/ox-alpha

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