VARIANTE · OpenAI / GPT

GPT gpt-5.3-codex API

A model variant exposed through RunAPI's unified AI API.

Operational · text · Commercial use supported

# Works with Claude Code, Codex, Gemini CLI, Cursor, and 50+ agents
npx skills add runapi-ai/gpt -g

The -g flag installs globally so every project picks it up.

Or paste this prompt to your AI agent:

Install the GPT skill for me:

1. Clone https://github.com/runapi-ai/gpt
2. Copy the skills/gpt/ directory into your
   user-level skills directory (e.g. ~/.claude/skills/
   for Claude Code, ~/.codex/skills/ for Codex).
3. Verify that SKILL.md is present.
4. Confirm the install path when done.

Switch variant

codex-auto-review gpt-5.2 gpt-5.2-pro gpt-5.3-codex-spark gpt-5.4 gpt-5.4-mini gpt-5.4-nano gpt-5.4-pro gpt-5.5 gpt-5.5-pro

RESUMEN

GPT gpt-5.3-codex is available through the same RunAPI auth, SDKs, and agent skill workflow.

Unified endpoint
SDK snippets
Agent install path
Las generaciones fallidas no se cobran

PRECIOS

Las generaciones fallidas no se cobran

Responses API

Input $0.88 / 1M tokens

Output $7.00 / 1M tokens

Cache read $0.09

Chat completion

Input $0.88 / 1M tokens

Output $7.00 / 1M tokens

Cache read $0.09

FICHA TÉCNICA

Model ID	gpt-5.3-codex
Proveedor	OpenAI
Modalidad	text
Task type	synchronous
Facturación	1K tokens
Endpoint	/v1/responses
Commercial	Yes
Status	Operational

INICIO RÁPIDO

Quickstart — gpt-5.3-codex

runapi.ai

curl -X POST https://runapi.ai/v1/responses \
  -H "Authorization: Bearer $RUNAPI_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "gpt-5.3-codex",
  "messages": [
    {
      "role": "user",
      "content": "Analyze this quarterly revenue data and produce a summary with key trends, anomalies, and three recommendations."
    }
  ]
}'

import { GptClient } from "@runapi.ai/gpt";

const client = new GptClient();
const result = await client.response.run({
    model: "gpt-5.3-codex",
    messages: [{"role":"user","content":"Analyze this quarterly revenue data and produce a summary with key trends, anomalies, and three recommendations."}],
});

require "runapi/gpt"

client = RunApi::Gpt::Client.new
result = client.response.run(
    model: "gpt-5.3-codex",
    messages: [{role: "user", content: "Analyze this quarterly revenue data and produce a summary with key trends, anomalies, and three recommendations."}]
)

@runapi.ai/gpt v1

CÓMO FUNCIONA