Grok Build vs OpenAI Codex (2026): Pricing, Features & Which to Choose

Who comes out ahead

Based only on the facts in our directory. The right pick still depends on the job you need done.

Lower starting price
Grok Build
From $8/mo against from $20/mo
Free plan
Tie
Neither has one
Higher rating
OpenAI Codex
4.0 against 4.4
Same job?
Yes
Both are Coding tools

Side by side

Compared on	Grok Build	OpenAI Codex
Our rating	4.0	4.4Better
Starts at	$8/moBetter	$20/mo
Free plan	No	No
Category	Coding	Coding
Plans	From $8/mo	From $20/mo
Key features	Terminal-first coding agent and CLI, not a chat-only interface Powered by Grok 4.5, xAI's model built for coding and agentic tasks Voice mode lets a developer dictate prompts directly to coding agents Usage and cost tracking built into the CLI Bundled into existing SuperGrok and X Premium Plus subscriptions	Cloud-based autonomous coding agent with sandboxed execution Codex CLI for local, terminal-based agent use Runs tests and returns a pull request for completed tasks IDE, terminal, and desktop app availability Distinct 2025 relaunch under a name last used for a different 2021 product
Pros	Included in an existing subscription rather than a new separate bill Backed by xAI's infrastructure and rapid Grok 4.5 model updates Voice-mode dictation is a genuinely distinct interaction most competitors lack	Genuinely autonomous, sandbox-based task execution Backed by OpenAI's continued model development and rapid feature updates Available across cloud, CLI, IDE, and desktop surfaces
Cons	No standalone free tier, requires a paid SuperGrok or X Premium Plus subscription Very new, launched July 2026, without an extensive independent track record Terminal-first design suits developers more than non-technical users	No free tier, requires a paid ChatGPT subscription or API access Name reuse from the original 2021 Codex can cause confusion when researching it Sandboxed cloud execution has less direct visibility than a live local session
Company	xAI, founded 2023	OpenAI, founded 2021

Prices come from each vendor's pricing page, last checked 20260714. Check the vendor before you buy.

FAQ

Questions people ask

Is Grok Build better than OpenAI Codex?

In our reviews Grok Build scores 4.0 and OpenAI Codex scores 4.4. The better pick depends on the job. Grok Build: XAI's terminal-first coding agent, bundled into SuperGrok and X Premium Plus. OpenAI Codex: A 2025 relaunch of a 2021 name, now a fully autonomous agent.

Which is cheaper, Grok Build or OpenAI Codex?

Grok Build has the lower starting price: from $8/mo for Grok Build and from $20/mo for OpenAI Codex.

Do Grok Build and OpenAI Codex have free plans?

Neither lists a free plan.

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