# Prezzi di OpenAI Codex: Quanto costa davvero la CLI nel 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 costa OpenAI Codex?

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.

- **Codex CLI è gratuita**: La CLI stessa non ha quota di abbonamento. Paghi solo per i token API consumati durante ogni sessione di codifica.
- **OpenAI diretto — $1.50 / $6.00 per 1M token**: L'input di codex-mini-latest costa $1.50/1M token, l'output costa $6.00/1M token tramite l'API OpenAI.
- **RunAPI — $0.75 / $3.00 per 1M token**: RunAPI fornisce lo stesso modello al 50% di sconto. Imposta due variabili d'ambiente e Codex instrada automaticamente attraverso RunAPI.
- **Nessun vincolo di abbonamento**: Paga solo per quello che usi. Nessuna quota mensile per posto. Nessuna spesa minima. Le fatture si fermano nel momento in cui smetti di programmare.

## Cosa viene contato come 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.

## Prezzi codex-mini-latest: OpenAI vs RunAPI

## Quanto costa un mese tipico?

## 

1. **Installa Codex CLI** — 
2. **Crea un account RunAPI** — 
3. **Imposta le variabili d'ambiente** — 
4. **Esegui Codex** — 
5. **Verifica il modello** — 

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