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About

GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, designed to handle complex professional work on a computer. It combines frontier-level coding performance with advanced reasoning and real-world task execution. The model is faster than previous Codex versions and can manage long-running tasks involving research, tools, and deployment. GPT-5.3-Codex supports real-time interaction, allowing users to steer progress without losing context. It excels at software engineering, web development, and terminal-based workflows. Beyond code generation, it assists with debugging, documentation, testing, and analysis. GPT-5.3-Codex acts as an interactive collaborator rather than a single-turn coding tool.

About

condense.chat is an LLM input compression API and drop-in proxy that shrinks prompts, retrieved documents, tool outputs, and repeated agent context before they hit upstream models. Less context, same Claude Code; its harness intercepts an agent’s growing session history and passes it through compression models before it reaches the main model, helping long-running coding agents start each next turn with fewer tokens. Condense sits between an app and the upstream LLM provider, tracks the conversation as a content-addressed chain, and transparently compresses repeated context on the way upstream. Developers can point their SDK at the Condense provider route, add a Condense key, keep their existing provider key, and change nothing else. It supports Anthropic and OpenAI-compatible routes, plus pass-through behavior for other provider paths such as model lists and embeddings.

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-5.3-Codex is built for software engineers, product teams, researchers, and technical professionals who need an interactive AI agent capable of executing complex, end-to-end computer-based work

Audience

AI developer-tool teams building long-running coding agents that need to compress repeated context before sending requests to upstream LLM providers

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

No information available.
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

condense.chat
United States
condense.chat/

Alternatives

Claude Opus 4.5

Claude Opus 4.5

Anthropic

Alternatives

Claude Opus 4.6

Claude Opus 4.6

Anthropic

Categories

Categories

Integrations

ChatGPT
OpenAI
Claude Code
Codex CLI
Cursor
Devin Desktop
Elixir
JavaScript
JetBrains Junie
Julia
Kotlin
Laravel
Microsoft Foundry
PrivatClaw
Python
R
SQL
Verdent
Visual Basic
Visual Studio Code

Integrations

ChatGPT
OpenAI
Claude Code
Codex CLI
Cursor
Devin Desktop
Elixir
JavaScript
JetBrains Junie
Julia
Kotlin
Laravel
Microsoft Foundry
PrivatClaw
Python
R
SQL
Verdent
Visual Basic
Visual Studio Code
Claim GPT-5.3-Codex and update features and information
Claim GPT-5.3-Codex and update features and information
Claim condense.chat and update features and information
Claim condense.chat and update features and information