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IFAI

GPT-5.3-Codex-Spark

Product2 stories

  1. AI modelsReach 46

    OpenAI clocks GPT-5.3-Codex-Spark at 1,200+ tokens per second

    OpenAI just boosted the inference speed of GPT-5.3-Codex-Spark by roughly 30%, pushing throughput past 1,200 tokens per second. That blistering output makes real-time code generation and autonomous developer workflows feel virtually instantaneous. OpenAI says broader speed upgrades across its model lineup are coming next.

  2. AI modelsReach 61

    OpenAI rolls out ultra-fast Codex-Spark for real-time coding

    OpenAI just launched GPT-5.3-Codex-Spark, a lightweight coding model powered by Cerebras chips that outputs over 1,000 tokens per second. Built for instantaneous, interactive edits rather than autonomous background tasks, it cuts roundtrip latency by up to 80%. ChatGPT Pro users can take it for a spin today inside Codex and VS Code.