Compare · Prices checked October 21, 2026
Augment Code vs OpenAI Codex (2026)
Published starting prices: Augment Code, $20/mo flat. OpenAI Codex, Free; Plus $20/mo. Side-by-side public pricing, what each does, real use cases and who each suits, all from our listings with sources. We haven't tested either hands-on.
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Coding
Augment Code
An AI coding agent with a context engine for large codebases, in the IDE and CLI.
Subscription$20/mo flat
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CodingFree tier
OpenAI Codex
OpenAI's coding agent, in a desktop app, CLI, IDE extension and on the web; included with ChatGPT plans.
Subscription · 3 use casesFree; Plus $20/mo
Quick answer
- Cheaper: Comparing the lowest listed monthly plans: Augment Code Standard: $20/mo (flat, up to 50 seats; $20 usage included), and OpenAI Codex Go: $8/mo (lightweight tasks). OpenAI Codex lists the lower one. OpenAI Codex also has a free plan. Plans differ in what they include, and some are per seat or billed yearly, so compare the plan details. Checked October 21, 2026.
- Free plans: Augment Code: no $0 plan on its pricing page (checked October 21, 2026). OpenAI Codex: yes. Its Free plan is $0 (quick tasks), checked October 21, 2026.
Pricing side by side
| Item |  Augment Code |  OpenAI Codex |
|---|---|---|
| Starting price | $20/mo flat | Free; Plus $20/mo |
| Pricing model | Subscription | Subscription |
| Free plan | No | Yes |
| Plans |
|
|
| Pricing note | not published | Or use your own API key and pay API prices. |
| Checked | October 21, 2026 | October 21, 2026 |
| Source | Vendor pricing page | Vendor pricing page |
Copied from each vendor's public pricing page on the date shown. "not published" means the vendor doesn't publish it; we don't guess. Prices change; confirm with the vendor.
Features and details from our listings
| Item | Augment Code | OpenAI Codex |
|---|---|---|
| What it is | An AI coding agent with a context engine for large codebases, in the IDE and CLI. | OpenAI's coding agent, in a desktop app, CLI, IDE extension and on the web; included with ChatGPT plans. |
| Made by | Augment Code | OpenAI |
| Listed under | Coding agents | Coding agents |
| Jobs it fits |
|
|
| Verified public use cases | 0 | 3 |
Use cases
Augment Code
We haven't found a verified public use case for Augment Code yet.
OpenAI Codex
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Use caseCoding
A developer ran Google's open Gemma 4 model locally inside Codex CLI and wrote up how a coding agent performs without a cloud model.
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Use caseCoding
Simon Willison used Codex CLI to port the JustHTML HTML5 parser from Python to JavaScript in about 4.5 hours, using the existing html5lib test suite to check the agent's work.
Dec 2025Simon Willison's Weblog
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Use caseCoding
Semgrep's security researchers had Claude Code and OpenAI Codex hunt for vulnerabilities in real Python web apps: both found real bugs (about 20 high-severity), but more than 80% of what they flagged were false positives.
Sep 2025Semgrep blog
Use cases are summarised in our own words from the linked public post; vendor case studies are labelled. All use cases.
Who each is best for
- Subscription
Augment Code is best for
- Teams that need to: Work across a large codebase; Run coding agents in IDE or CLI.
- Budget: starts at $20/mo flat (subscription).
- SubscriptionFree plan
OpenAI Codex is best for
- Teams that need to: Port or rewrite code against a test suite; Delegate coding tasks to run in the cloud.
- Budget: starts at Free; Plus $20/mo (subscription, free plan available).
From our listing data (jobs, public pricing); not a hands-on test. Full details: Augment Code · OpenAI Codex.
FAQ
Which is cheaper, Augment Code or OpenAI Codex?
Comparing the lowest listed monthly plans: Augment Code Standard: $20/mo (flat, up to 50 seats; $20 usage included), and OpenAI Codex Go: $8/mo (lightweight tasks). OpenAI Codex lists the lower one. OpenAI Codex also has a free plan. Plans differ in what they include, and some are per seat or billed yearly, so compare the plan details. Checked October 21, 2026.
Is Augment Code free? Is OpenAI Codex free?
Augment Code: no $0 plan on its pricing page (checked October 21, 2026). OpenAI Codex: yes. Its Free plan is $0 (quick tasks), checked October 21, 2026.
How much does Augment Code cost?
Augment Code lists Standard: $20/mo (flat, up to 50 seats; $20 usage included); Business: $100/mo (flat; $100 usage included). Its lowest listed monthly plan is Standard: $20/mo (flat, up to 50 seats; $20 usage included). Checked October 21, 2026 on the vendor's pricing page.
How much does OpenAI Codex cost?
OpenAI Codex lists Free: $0 (quick tasks); Go: $8/mo (lightweight tasks); Plus: $20/mo (Codex on web, CLI, IDE); Pro: from $100/mo; Business: $25/user/mo ($20 billed annually). Its lowest listed monthly plan is Go: $8/mo (lightweight tasks). Or use your own API key and pay API prices. Checked October 21, 2026 on the vendor's pricing page.
Did AITeamGuide test them?
Not hands-on. This comparison is built from each vendor's public pricing page (with the date we checked it), published product information and credited public use cases.
Can a vendor pay to win this comparison?
No. Nothing here is paid. Paid placements on AITeamGuide are always labelled "Sponsored" or "Featured" and never change a comparison or ranking.
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