What is ChatGPT with Codex used for?

ChatGPT with Codex combines conversational AI with coding assistance. You can ask questions, brainstorm ideas, create documents, analyze data, and use Codex to understand codebases, build features, fix bugs, and review code across CLI, IDE, and cloud interfaces.

How does pricing work for ChatGPT and Codex?

Pricing is based on plans: Free (limited), Go ($8/month), Plus ($20/month), Pro (from $100/month for 5x limits, $200/month for 20x), Business and Enterprise (custom), and API Key (pay per token). Usage is tracked in tokens and credits; each plan has included limits for local messages, cloud chats, and code reviews per rolling 5-hour window.

What happens when I reach my usage limit?

If you reach a usage limit during an active turn, the agent can finish that turn subject to fair use. Plus and Pro users can purchase additional credits to continue. You can also switch to a smaller model or use an API key for extra local chats.

What are tokens and credits?

Tokens are units of text that ChatGPT reads and writes; credits are a simplified unit that converts token usage into a manageable consumption metric. Different models and features consume credits at different rates (e.g., GPT-5.6 Sol costs 125 credits per 1M input tokens, while Luna costs 25 credits).

Which Codex surfaces are available?

Codex is available in the ChatGPT web app, desktop app, CLI, IDE extension, and cloud integrations (e.g., GitHub automatic reviews, Slack). Cloud chats and local chats are supported. API Key users can access Codex via CLI, SDK, or IDE extension but not cloud features.

ChatGPT

Updated Jul 25, 2026

Unify ChatGPT's conversational AI with Codex's coding power. Explore ideas, create documents, analyze data, and build software—all in one app.

Categories:

Chatbots|

Code Assistant|

Productivity

#chatgpt#ai assistant#code generation#automation#productivity

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Editor's Verdict

Rating: 4.9/5.0•Reviewed by RAGWiki

At $0/month, ChatGPT stands out as a powerful solution in the chatbots,code assistant,productivity landscape. It is especially well-suited for professionals like Software Engineer and Data Analyst. However, potential buyers should note that it might not be perfect if you are strictly trying to avoid complex usage limits. Overall, it offers a robust toolset that significantly accelerates workflows.

Key Takeaways

Conversational AI
Work Automation
Codex Code Assistance
Multiple AI Models

In-Depth Review: What is ChatGPT?

ChatGPT now integrates Codex, enabling you to converse, create, and code seamlessly. Use Chat for brainstorming, research, and planning. Use Work for generating documents, spreadsheets, and presentations from files. Use Codex to navigate codebases, build features, and ship changes. Download the app to bring your ideas to life with the power of AI.

Core Features

Conversational AI

Use Chat to ask questions, get explanations, brainstorm ideas, and compare options through natural conversation.

Work Automation

Turn goals, files, and context into documents, spreadsheets, presentations, and other deliverables with ChatGPT Work.

Codex Code Assistance

Understand codebases, build features, fix bugs, and review changes using Codex integrated in CLI, IDE, and cloud.

Multiple AI Models

Choose from GPT-5.6 Sol, Terra, Luna, and other models to balance quality, speed, and cost.

Integrations and Automation

Manage inbox, automate workflows, and connect with Slack, GitHub, Linear, and other tools.

Computer Use

Let ChatGPT click, type, and navigate apps on your Mac for automated tasks.

Pricing

Free

$0/month

Explore Codex capabilities on quick coding tasks

Go

$8/month

Use Codex for lightweight coding tasks

Plus

$20/month

Power a few focused coding sessions each week
Codex on web, CLI, IDE extension, and iOS
Cloud-based integrations like automatic code review and Slack
GPT-5.6 model family
GPT-5.6 Luna for higher usage limits
Flexibly extend with ChatGPT credits
Other ChatGPT Plus features

Pro 5x

$100/month

5x higher rate limits than Plus
Access to GPT-5.3-Codex-Spark (research preview)
Unlimited ChatGPT Voice on $200/month tier
Other Pro features

Pro 20x

$200/month

20x higher rate limits than Plus
Access to GPT-5.3-Codex-Spark
Unlimited ChatGPT Voice
Other Pro features

Business

Contact sales

SAML SSO, MFA, and user management
Cloud-managed config policies
No training on data by default
Analytics dashboard
Sites beta included

Enterprise / Edu

Contact sales

Flexible pricing with credits
SCIM, EKM, domain verification
Retention and residency controls
Compliance API and audit logs
Codex Security

API Key

Pay per token

Codex in CLI, SDK, or IDE extension
No cloud-based features
Model availability follows API
Pay only for tokens used

Pros and Cons

Pros

Versatile Coding AssistantCodex supports multiple environments (CLI, IDE, web) and can handle code understanding, feature building, bug fixing, and reviews.
Multiple Model OptionsChoose from GPT-5.6 Sol, Terra, Luna, and others to optimize for quality, speed, or cost.
Integration EcosystemSeamlessly integrates with GitHub, Slack, Linear, and other tools, enabling automation and code review workflows.
Flexible Pricing TiersFrom free to enterprise plans, with credits and pay-as-you-go options to scale usage.
Cloud and Local SupportRun tasks locally or in the cloud, with the ability to extend usage via API keys.

Cons

Complex Usage LimitsUsage is counted in tokens and credits with varying costs per model, making it hard to predict consumption.
Limited Free PlanFree plan only allows quick coding tasks and lacks cloud features.
Regional RestrictionsSome features like Computer Use and Memories are limited to specific regions.
Credit System ComplexityCredits are consumed at different rates for image generation, fast mode, and different models, requiring careful management.
Feature Gaps in Lower TiersPlans below Pro lack GPT-5.3-Codex-Spark, Sites, and some cloud integrations.

Use Cases & Recommended Professions

Software Engineer→ View Toolkit

Use Codex to navigate codebases, build features, fix bugs, and review pull requests efficiently.

Data Analyst→ View Toolkit

Leverage ChatGPT Work to analyze files, find patterns, and create reports or dashboards.

Product Manager→ View Toolkit

Brainstorm ideas, compare options, and generate documents like specs and presentations.

Researcher→ View Toolkit

Synthesize information from multiple sources and get concise summaries for literature reviews.

Content Writer→ View Toolkit

Use ChatGPT to draft, edit, and refine articles, emails, and creative content.

DevOps Engineer→ View Toolkit

Automate CI/CD pipelines, manage infrastructure as code, and use Codex for scripting.

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ℹ️ Curation Disclosure: The overview and features of ChatGPT were synthesized using AI and fact-checked by our curation team to ensure accuracy.