BiWu.AiOpenAI Codex Pricing: ChatGPT Plans and API
OpenAI's Codex coding agent comes with ChatGPT plans: limited access on Free and Go, expanded usage on Plus ($20 a month) and the most on Pro, which comes in $100, $200 and $500 monthly tiers.
With an API key, Codex runs in the CLI, SDK or IDE extension at API prices. GPT-5.3 Codex costs $1.75 per 1M input tokens and $14 per 1M output tokens.
ChatGPT Plus is cheapest in Philippines at ₱999 ($15.89) on the app stores we track.
Prices checked Oct 10, 2026
ChatGPT Plus
$20/month
Expanded Codex usage
ChatGPT Pro
From $100/month
GPT-5.3 Codex API
$1.75 / $14
Input / output per 1M
Free plan
Limited
ChatGPT plans that include Codex
| Plan | Price | Codex access |
|---|---|---|
| Free | $0 | Limited Codex access |
| Go | $8/month | Limited |
| Plus | $20/month | Expanded usage on web, CLI, IDE extension and iOS; extra credits can be bought |
| Pro | $100, $200 or $500/month | Highest usage; Ultrafast mode only on the $500 tier |
| Business | $25/user/month | $20/user/month billed annually, for 2 or more users |
| Enterprise and Edu | Contact sales | Credit-based and token-based pricing |
Codex API pricing
Prices per 1M tokens from the OpenAI API pricing page. With an API key you get Codex in the CLI, SDK and IDE extension, but not cloud features such as GitHub code review.
| Model and tier | Input | Cached input | Output |
|---|---|---|---|
| GPT-5.3 Codex, Standard | $1.75 | $0.175 | $14 |
| GPT-5.3 Codex, Fast | $3.50 | $0.35 | $28 |
Entry price of popular AI coding tools
The cheapest paid plan of each tool, billed monthly in the US. Usage limits differ a lot between tools, so compare what each plan includes.
| Tool | Plan | Monthly price |
|---|---|---|
| Cursor | Pro | $20 |
| GitHub Copilot | Pro | $10 |
| Windsurf (Devin Desktop) | Pro | $20 |
| Claude Code | Claude Pro | $20 |
| Codex | ChatGPT Plus | $20 |
FAQ
Is Codex free?
ChatGPT Free and Go include limited Codex access. Plus ($20 a month) expands it, and Pro plans give the most usage.
How much does Codex cost on the API?
GPT-5.3 Codex costs $1.75 per 1M input tokens, $0.175 per 1M cached input tokens and $14 per 1M output tokens at the standard tier. The Fast tier costs twice as much.
Which ChatGPT plan is best for Codex?
Plus is the cheapest plan with expanded Codex usage. Pro plans ($100, $200 or $500 a month) raise the limits further; teams can use Business at $25 per user per month.
Sources
- ChatGPT pricing page (checked Oct 10, 2026)
- Codex pricing docs (checked Oct 10, 2026)
- OpenAI API pricing (checked Oct 10, 2026)
Related pricing
BiWu.Ai lists public prices for reference only and is not affiliated with these tools. Prices are in US dollars before tax and can change at any time; confirm the final price on the vendor's pricing page before you subscribe.