+
+

Related Products

  • Google AI Studio
    26 Ratings
    Visit Website
  • JetBrains Junie
    12 Ratings
    Visit Website
  • Gemini Enterprise Agent Platform
    962 Ratings
    Visit Website
  • Windsurf Editor
    168 Ratings
    Visit Website
  • Retool
    570 Ratings
    Visit Website
  • LM-Kit.NET
    28 Ratings
    Visit Website
  • Concord
    237 Ratings
    Visit Website
  • SmartDraw
    533 Ratings
    Visit Website
  • StackAI
    53 Ratings
    Visit Website
  • Checksum.ai
    1 Rating
    Visit Website

About

GPT-5.2-Codex is OpenAI’s most advanced agentic coding model, built for complex, real-world software engineering and defensive cybersecurity work. It is a specialized version of GPT-5.2 optimized for long-horizon coding tasks such as large refactors, migrations, and feature development. The model maintains full context over extended sessions through native context compaction. GPT-5.2-Codex delivers state-of-the-art performance on benchmarks like SWE-Bench Pro and Terminal-Bench 2.0. It operates reliably across large repositories and native Windows environments. Stronger vision capabilities allow it to interpret screenshots, diagrams, and UI designs during development. GPT-5.2-Codex is designed to be a dependable partner for professional engineering workflows.

About

Lumen Outpost is Cosine’s targeted post-trained coding model, benchmarked against Kimi K2.6, its base model, GPT-5.5, GPT-5.4, and Gemini 3.1 Pro on highly complex, long-horizon coding tasks across 13 programming languages. The model is specialized not only for raw coding accuracy, but also for behavioral signals that matter in professional engineering workflows, including agent initiative, planning, scope discipline, action alignment, concise updates, and useful communication. Cosine’s benchmark report shows that highly targeted post-training transformed the base model’s capabilities, with Lumen Outpost outperforming Kimi K2.6 across Niche-Bench, Slop-Bench, Vibe-Bench, and cost per successful task. On Niche-Bench, an internal evaluation for niche, legacy, and environment-constrained programming languages, Lumen Outpost achieved a 53.9% score and led or tied in 9 of 13 assessed languages, with notable gains in Fortran, ABAP, Java, and Rust.

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Platforms Supported

Windows
Mac
Linux
Cloud
On-Premises
iPhone
iPad
Android
Chromebook

Audience

GPT-5.2-Codex is ideal for professional software engineers, security researchers, and development teams working on large-scale codebases, complex refactors, and defensive cybersecurity projects

Audience

Engineering teams and AI coding platform developers that need a specialized coding model for long-horizon software tasks, niche languages, cleaner implementations, and agentic developer workflows

Support

Phone Support
24/7 Live Support
Online

Support

Phone Support
24/7 Live Support
Online

API

Offers API

API

Offers API

Screenshots and Videos

Screenshots and Videos

Pricing

No information available.
Free Version
Free Trial

Pricing

$20 per month
Free Version
Free Trial

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation
Webinars
Live Online
In Person

Training

Documentation
Webinars
Live Online
In Person

Company Information

OpenAI
Founded: 2015
United States
openai.com

Company Information

Cosine
United Kingdom
cosine.sh/blog/lumen-outpost-benchmark-report

Alternatives

Claude Opus 4.5

Claude Opus 4.5

Anthropic

Alternatives

GLM-5

GLM-5

Zhipu AI
Claude Opus 4.6

Claude Opus 4.6

Anthropic
Composer 2

Composer 2

Cursor

Categories

Categories

Integrations

Java
C#
C++
ChatGPT Plus
Codex CLI
Codex Security
EasyClaw
GPT-5.4 mini
GPT-5.5
GPT‑5.4 Thinking
GitHub
HTML
JetBrains Junie
Julia
Laravel
Microsoft Foundry
OpenClaw
PHP
Rust
Scala

Integrations

Java
C#
C++
ChatGPT Plus
Codex CLI
Codex Security
EasyClaw
GPT-5.4 mini
GPT-5.5
GPT‑5.4 Thinking
GitHub
HTML
JetBrains Junie
Julia
Laravel
Microsoft Foundry
OpenClaw
PHP
Rust
Scala
Claim GPT-5.2-Codex and update features and information
Claim GPT-5.2-Codex and update features and information
Claim Lumen Outpost and update features and information
Claim Lumen Outpost and update features and information