Comparison

Claude Code vs OpenAI Codex

Claude Code and OpenAI Codex compared from each vendor's own documentation, read on 10 October 2026. If your organisation standardises on Claude models or buys them through Bedrock, Google Cloud or Microsoft Foundry, choose Claude Code. It runs Claude models only and documents those three cloud providers. If your organisation already pays for ChatGPT Business or Enterprise, choose OpenAI Codex. It is included in those plans, so it adds no separate seat.

Written by TechFabric, which builds Fabric, an open-source AI agent platform that gives Cursor, Claude Code and other coding agents your team's documents, tickets and decisions over MCP, with sources. Fabric is not one of the options compared here.

Vendor documentation read 10 October 2026 · by TechFabric

Where they differ

	Claude Code	OpenAI Codex
Where it runs	A terminal CLI, extensions for VS Code (and Cursor) and JetBrains IDEs, a desktop app, and claude.ai/code in the browser and mobile app. It also takes tasks from Slack and runs in GitHub Actions and GitLab CI/CD.code.claude.com	The Codex CLI, an IDE extension for VS Code and compatible editors such as Cursor and Windsurf (JetBrains and Xcode have their own integrations), the ChatGPT desktop app, and Codex Cloud from the web, desktop or mobile.learn.chatgpt.com
Pricing and plans (as published 10 Oct 2026)	Included in Claude Pro ($20/mo, or $17/mo billed annually), Max (from $100/mo), Team (Standard seat $25/mo monthly or $20 annually; Premium seat $125 or $100) and Enterprise ($20/seat/mo billed annually plus usage at API rates). Not included in the Free plan. It can also be billed per token through an Anthropic Console account.claude.com	Included in ChatGPT plans. Free and Go ($8/mo) get GPT-6 Luna in the desktop app, subject to rollout. Plus is $20/mo; Pro is $100, $200 or $500/mo; Business is $25/user/mo monthly or $20 billed annually (2+ users); Enterprise and Edu are priced by sales. An API key pays API token prices and excludes cloud features such as GitHub code review and Slack.learn.chatgpt.com
Models available	Claude models only. The opus, sonnet and haiku aliases resolve to Opus 5.5, Sonnet 5.5 and Haiku 5.5 on the Anthropic API; Fable 5.1 and Fable 5 are selected explicitly and, depending on plan, can bill to usage credits.code.claude.com	OpenAI models: GPT-6.1 Sol, GPT-6 Sol and GPT-6 Luna with ChatGPT sign-in. GPT-5.5 retires from Codex on all plans on 14 October 2026. Local clients can be pointed at other providers, including Ollama and LM Studio, through model_providers in config.toml.learn.chatgpt.com
Agent and background work	Runs as a local agent with subagents and background agents. Cloud sessions on the web keep running with your computer off, routines run on a schedule or on GitHub events, and GitHub Actions or GitLab CI/CD cover pipeline automation.code.claude.com	The CLI and IDE extension work against your local repository, and codex exec runs it from scripts and CI. Codex Cloud gives each task its own workspace that keeps working while your computer is asleep, then you review and open a pull request.learn.chatgpt.com
MCP support	Supported on every surface from the same configuration. Administrators can allowlist or denylist servers, or provide servers to every user, through managed settings.code.claude.com	Supported. The desktop app, CLI and IDE extension connect directly to MCP servers and share configuration; ChatGPT on the web uses remote MCP tools supplied by plugins.learn.chatgpt.com
Enterprise controls and data use	SSO on Team and Enterprise; SCIM, audit logs and custom data retention on Enterprise. Anthropic does not train on Team, Enterprise, API or cloud-provider traffic by default; Free, Pro and Max users choose whether their data is used. Zero data retention is available to qualified Enterprise accounts. It can also run through Amazon Bedrock, Google Cloud's Agent Platform or Microsoft Foundry.code.claude.com	Business includes SAML SSO, MFA and no training on business data by default. Enterprise and Edu add SCIM, EKM, role-based access control, audit logs through the Compliance API, and data retention and residency controls.learn.chatgpt.com
Open-source client	Not stated in Anthropic docs.code.claude.com	The Codex CLI and SDK are developed in the open at github.com/openai/codex.learn.chatgpt.com

Which to choose

01Your organisation standardises on Claude models or buys them through Bedrock, Google Cloud or Microsoft Foundry: Claude Code. It runs Claude models only and documents those three cloud providers.
02Your organisation already pays for ChatGPT Business or Enterprise: OpenAI Codex. It is included in those plans, so it adds no separate seat.
03You want to read or modify the agent's client source, or point it at a local model: OpenAI Codex. Its CLI is developed openly on GitHub and accepts other model providers such as Ollama; Anthropic's docs do not state the same for Claude Code.

How the comparison was done

Every cell in the table comes from Claude Code's or OpenAI Codex's own documentation, pricing or product pages, read on 10 October 2026, and links to the page it came from. Where a vendor's documentation does not say something, the cell says so instead of guessing. Nothing here comes from a benchmark we ran, and the verdicts only follow from the table.

Plans, prices and model lists for coding agents change month to month. Check the vendor's page before you buy, and tell us if a cell has gone stale.

Who wrote this, and their stake

TechFabric wrote this page. We build Fabric, an open-source AI agent platform that is neither Claude Code nor OpenAI Codex. It runs as an MCP server, so either one can read your team's record and cite its sources from the session you already have open. We gain if you use Fabric with whichever you choose, and nothing from which one that is.

Sources

Each page below was read on 10 October 2026.

Questions

Claude Code or OpenAI Codex: which if your organisation standardises on Claude models or buys them through Bedrock, Google Cloud or Microsoft Foundry?

Claude Code. It runs Claude models only and documents those three cloud providers.

Claude Code or OpenAI Codex: which if your organisation already pays for ChatGPT Business or Enterprise?

OpenAI Codex. It is included in those plans, so it adds no separate seat.

Claude Code or OpenAI Codex: which if you want to read or modify the agent's client source, or point it at a local model?

OpenAI Codex. Its CLI is developed openly on GitHub and accepts other model providers such as Ollama; Anthropic's docs do not state the same for Claude Code.

Where do the Claude Code vs OpenAI Codex facts come from?

From Claude Code's and OpenAI Codex's own documentation and pricing pages, read on 10 October 2026 and linked under Sources on this page. Nothing here comes from a hands-on benchmark. Plans and models change often, so check the vendor's page before you buy.

Does Fabric replace Claude Code or OpenAI Codex?

No. Fabric runs as an MCP server, so either tool can use Fabric's shared record, cited answers and agents from the session you already have open. Fabric is built by TechFabric, which wrote this comparison.