# OpenAI — Introducing GPT-5.3-Codex-Spark

- Company: OpenAI (openai.com)
- Announced: 2026-02-12T10:00:00+00:00
- Category: new-model
- Subject: GPT / ChatGPT / API
- Models affected: GPT-5.3-Codex-Spark
- Context window: 128k context
- Source: https://openai.com/index/introducing-gpt-5-3-codex-spark
- Record: https://forck.live/items/274-introducing-gpt-5-3-codex-spark

OpenAI announced GPT-5.3-Codex-Spark, its first real-time coding model with 15x faster generation and a 128k context window, available in research preview for ChatGPT Pro users.

## Evidence

Verbatim from https://openai.com/index/introducing-gpt-5-3-codex-spark:

> Introducing GPT-5.3-Codex-Spark—our first real-time coding model. 15x faster generation, 128k context, now in research preview for ChatGPT Pro users.

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