Compare · Prices checked October 21, 2026
Devin vs OpenAI Codex (2026)
Published starting prices: Devin, Free; Pro $20/mo. 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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CodingFree tier
Devin
An autonomous coding agent from Cognition, now sold with local and cloud agents (Devin Cloud) and its own SWE models. Windsurf, Cognition's AI code editor, was renamed Devin Desktop on June 2, 2026.
Subscription · 1 use caseFree; Pro $20/mo
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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: Devin Pro: $20/mo (includes cloud agents), and OpenAI Codex Go: $8/mo (lightweight tasks). OpenAI Codex lists the lower one. Devin and OpenAI Codex also have 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: Devin: yes. Its Free plan is $0 (light quota), checked October 21, 2026. OpenAI Codex: yes. Its Free plan is $0 (quick tasks), checked October 21, 2026.
Pricing side by side
| Item |  Devin |  OpenAI Codex |
|---|---|---|
| Starting price | Free; Pro $20/mo | Free; Plus $20/mo |
| Pricing model | Subscription | Subscription |
| Free plan | Yes | 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 | Devin | OpenAI Codex |
|---|---|---|
| What it is | An autonomous coding agent from Cognition, now sold with local and cloud agents (Devin Cloud) and its own SWE models. Windsurf, Cognition's AI code editor, was renamed Devin Desktop on June 2, 2026. | OpenAI's coding agent, in a desktop app, CLI, IDE extension and on the web; included with ChatGPT plans. |
| Made by | Cognition | OpenAI |
| Listed under | Coding agents | Coding agents |
| Jobs it fits |
|
|
| Verified public use cases | 1 | 3 |
Use cases
Devin
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Use caseCoding
Answer.AI gave Devin 20 real tasks over a month: 3 succeeded, 14 failed and 3 were inconclusive, and simple-looking tasks often took days.
Jan 2025Answer.AI
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
- SubscriptionFree plan
Devin is best for
- Teams that need to: Hand off well-defined coding tickets; Run several agent tasks in the cloud.
- Budget: starts at Free; Pro $20/mo (subscription, free plan available).
- Watch out: Answer.AI's month-long test: 3 of 20 tasks succeeded, 14 failed. Source
- 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: Devin · OpenAI Codex.
FAQ
Which is cheaper, Devin or OpenAI Codex?
Comparing the lowest listed monthly plans: Devin Pro: $20/mo (includes cloud agents), and OpenAI Codex Go: $8/mo (lightweight tasks). OpenAI Codex lists the lower one. Devin and OpenAI Codex also have 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 Devin free? Is OpenAI Codex free?
Devin: yes. Its Free plan is $0 (light quota), checked October 21, 2026. OpenAI Codex: yes. Its Free plan is $0 (quick tasks), checked October 21, 2026.
How much does Devin cost?
Devin lists Free: $0 (light quota); Pro: $20/mo (includes cloud agents); Max: $200/mo (much higher quotas); Teams: $80/mo + $40/dev seat. Its lowest listed monthly plan is Pro: $20/mo (includes cloud agents). 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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