# Introducing GPT-5.3-Codex-Spark

DevFeed: [Introducing GPT-5.3-Codex-Spark](<https://devfeed.tech/articles/introducing-gpt-5-3-codex-spark-6491.md>)

Original publisher: [Read original article](<https://openai.com/index/introducing-gpt-5-3-codex-spark>)

Published: 2026-02-12T10:00:00Z

Content type: release

Language: en

Sources: [OpenAI News](<https://devfeed.tech/sources/openai-news.md>)

Topics: [codex](<https://devfeed.tech/topics/codex.md>), [coding](<https://devfeed.tech/topics/coding.md>), [real-time](<https://devfeed.tech/topics/real-time.md>), [Latency](<https://devfeed.tech/topics/latency.md>), [Low Latency](<https://devfeed.tech/topics/low-latency.md>), [Software Engineering](<https://devfeed.tech/topics/software-engineering.md>), [ChatGPT](<https://devfeed.tech/topics/chatgpt.md>), [Inference](<https://devfeed.tech/topics/inference.md>), [long-context](<https://devfeed.tech/topics/long-context.md>)

Tags: [agentic](<https://devfeed.tech/tags/agentic.md>), [benchmarks](<https://devfeed.tech/tags/benchmarks.md>), [chatgpt](<https://devfeed.tech/tags/chatgpt.md>), [codex](<https://devfeed.tech/tags/codex.md>), [coding](<https://devfeed.tech/tags/coding.md>), [collaboration](<https://devfeed.tech/tags/collaboration.md>), [context-window](<https://devfeed.tech/tags/context-window.md>), [developers](<https://devfeed.tech/tags/developers.md>), [engineering](<https://devfeed.tech/tags/engineering.md>), [inference](<https://devfeed.tech/tags/inference.md>), [latency](<https://devfeed.tech/tags/latency.md>), [low-latency](<https://devfeed.tech/tags/low-latency.md>), [model](<https://devfeed.tech/tags/model.md>), [product](<https://devfeed.tech/tags/product.md>), [real-time](<https://devfeed.tech/tags/real-time.md>), [software](<https://devfeed.tech/tags/software.md>), [software-engineering](<https://devfeed.tech/tags/software-engineering.md>), [speed](<https://devfeed.tech/tags/speed.md>), [tokens](<https://devfeed.tech/tags/tokens.md>)

## AI overview

OpenAI announces GPT-5.3-Codex-Spark, a research-preview model designed for real-time coding. Optimized for ultra-low-latency hardware, it delivers more than 1,000 tokens per second, supports a 128k context window, and is available to ChatGPT Pro users for experimentation.

## Source excerpt

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.