Observed Signal · Feb 12, 2026 · Technical Release · Source: techcrunch · Impact: 4/5 · Sentiment: Positive
OpenAI Unveils Lightning-Fast Codex with New Cerebras Chip
OpenAI announced a lightweight, low-latency version of its coding agent Codex called GPT-5.3-Codex-Spark, designed for faster inference and rapid prototyping. Spark is intended for real-time collaboration and shorter development tasks, and is available as a research preview to ChatGPT Pro users in the Codex app. To deliver the lower latency, OpenAI is running Spark on Cerebras’ Wafer Scale Engine 3 (WSE-3) as part of a recently disclosed multi-year compute agreement between the two companies reportedly worth over $10 billion. Cerebras’ WSE-3 is described as its third-generation waferscale megachip with roughly 4 trillion transistors. Cerebras also recently raised $1 billion in funding at a reported $23 billion valuation. OpenAI framed Spark as the first milestone in deeper hardware integration with Cerebras to speed model responses.
OpenAI — a major AI platform — released a new low-latency model and disclosed deeper hardware integration with Cerebras (multi-year, $10B+), which can materially affect model performance and latency-sensitive AI use cases across industries.
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Key Takeaways & Evidence Grounding
- OpenAI released GPT-5.3-Codex-Spark, a lightweight, lower-latency variant of its Codex coding model.
- Codex-Spark is designed for real-time collaboration and rapid prototyping and is in research preview for ChatGPT Pro users in the Codex app.
- OpenAI will run Spark on Cerebras’ Wafer Scale Engine 3 (WSE-3) to achieve very low inference latency.
- OpenAI and Cerebras announced a multi-year partnership last month reportedly worth over $10 billion.
- Cerebras recently raised $1 billion in fresh capital at a reported $23 billion valuation; WSE-3 is described as having about 4 trillion transistors.
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OpenAI Unveils Lightning-Fast GPT-5.3 Codex-Spark Model
OpenAI announced a research preview of GPT‑5.3‑Codex‑Spark, a smaller, ultra-fast variant of GPT‑5.3‑Codex optimized for real‑time coding. Launched February 12, 2026, Codex‑Spark is served on low‑latency Cerebras hardware and delivers over 1,000 tokens per second with a 128k text-only context window. Initially available to ChatGPT Pro users as a research preview and to a small set of API design partners, Codex‑Spark emphasizes minimal, targeted edits for interactive workflows. OpenAI also rolled out end-to-end latency improvements (persistent WebSocket support and Responses API optimizations) that reduce roundtrip and per-token overheads and speed time-to-first-token. The model is evaluated under OpenAI’s safety processes and is text-only at launch; broader capabilities and access will expand over time.
Unveiling GPT-5.3-Codex: Next-Level Coding Intelligence
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OpenAI Launches GPT-5.5 and Codex Superapp
OpenAI released GPT‑5.5, the successor to GPT‑5.4, positioning the model as an agentic AI designed to work autonomously across multi-step tasks with a focus on software development and scientific collaboration. OpenAI says GPT‑5.5 can plan, use tools, navigate user interfaces, switch between tools, and verify its work; nearly 200 early‑access partners provided feedback. The model is available in ChatGPT and Codex across paid tiers (Plus, Pro, Business, Enterprise; Codex: Edu and Go) with API access coming soon. OpenAI published benchmark results showing lead performance in several tests (e.g., Terminal‑Bench 2.0: 82.7%), while some comparisons exclude competitors and independent evaluations are still pending. GPT‑5.5 is reported to be more expensive than GPT‑5.4 but more token‑efficient; OpenAI says it will ship the model with stricter safety controls. The article notes limited transparency in cross‑vendor benchmarking and highlights product variant GPT‑5.5 Pro for higher‑accuracy tasks.
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