Overview
A small, ultra-fast Codex research preview designed for real-time interactive coding.
GPT-5.3-Codex-Spark
A small, ultra-fast Codex research preview designed for real-time interactive coding.
MODEL NUMBER038
- Release date
- 2026-02-12
- Organization
- OpenAI
- Family
- GPT
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Specifications
Only published specifications are shown.
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Overview
PreviousGPT-5.3-Codex— · 400K ctx
CurrentGPT-5.3-Codex-Spark— · 128K ctx
New capabilities Fast action
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Architecture & capabilities
Key capabilities
CodingFast action
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Release history
GPT-5.3-Codex-Spark launched as a real-time coding research preview.
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Related models
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