# Preços do Codex da OpenAI: O que a CLI realmente custa em 2026

OpenAI Codex CLI is a free, open-source tool — but it sends every prompt to the OpenAI API, which charges per token. One image compression task burned 7,675 tokens: between 3 and 11 cents. The default model, codex-mini-latest, costs $1.50 per million input tokens and $6.00 per million output tokens. Pointing Codex at RunAPI instead cuts those rates by 50%, with no other changes to your workflow.

*Updated June 23, 2026 · RunAPI Editorial*

## Quanto custa o Codex da OpenAI?

The Codex CLI itself is free to download and run. The cost comes from API calls: every prompt, file read, and code generation goes to the OpenAI API. The default model is codex-mini-latest, priced at $1.50/1M input tokens and $6.00/1M output tokens through OpenAI directly. A moderate coding session — roughly 8M input and 2M output tokens per month — runs about $24 with OpenAI. The same usage through RunAPI costs $12. RunAPI is OpenAI-compatible, so you change two environment variables and nothing else. Tip: run /compact during long sessions to free up context and stop burning tokens on conversation history.

- **O Codex CLI é gratuito**: A CLI em si não tem taxa de assinatura. Você paga apenas pelos tokens de API consumidos durante cada sessão de codificação.
- **OpenAI direto — $1,50 / $6,00 por 1M tokens**: A entrada do codex-mini-latest custa $1,50/1M tokens, a saída custa $6,00/1M tokens pela API OpenAI.
- **RunAPI — $0,75 / $3,00 por 1M tokens**: O RunAPI entrega o mesmo modelo com 50% de desconto. Defina duas variáveis de ambiente e o Codex roteia pelo RunAPI automaticamente.
- **Sem bloqueio de assinatura**: Pague apenas pelo que usar. Sem mensalidade. Sem gasto mínimo. As cobranças param no momento em que você para de codificar.

## O que conta como token?

Every message Codex sends to the API includes your prompt, the full context of files it has read, any tool results, and conversation history. That combined input is tokenized (roughly 750 words per 1,000 tokens). The model's response — edited code, explanations, next steps — counts as output tokens. Both directions are billed separately. Codex caches nothing between sessions, so a fresh session re-reads the same files and bills that context again. One real example from a developer testing image compression — a single 5 MB file task burned 7,675 tokens, or roughly 3 to 11 cents. Not very cheap for one file, but most coding sessions stay well under a dollar each.

## Preços do codex-mini-latest: OpenAI vs RunAPI

## Quanto custa um mês típico?

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1. **Instalar o Codex CLI** — 
2. **Criar uma conta RunAPI** — 
3. **Definir suas variáveis de ambiente** — 
4. **Executar o Codex** — 
5. **Verificar o modelo** — 

## Perguntas comuns sobre preços do Codex

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