Evidence96%Authoritative
FactConfirmedProduct·March 13, 2026
OpenAI GPT-5.3-Codex-Spark Powered by Cerebras Launches in Research Preview
OpenAI's GPT-5.3-Codex-Spark model, optimized for real-time coding at over 1,000 tokens/s on the Cerebras Wafer-Scale Engine, launched as a research preview for ChatGPT Pro users, marking the first product release from the Cerebras-OpenAI collaboration.
Evidence Strength
Evidence96%Authoritative
Backed by official company doc
Single publisher source
Includes official or primary source
Key Development
Transformative development (significance 9-10)
Covered by 3 sources
Confirmed — verified event
Insights
First tracked
November 3, 2025
Last updated
March 13, 2026
Sources
3 sources
Related Developments
Cerebras Delivers 3,000 Tokens/Second Inference for OpenAI's gpt-oss-120B Open-Weight ModelOpenAI Signs $10B+ Multiyear Compute Deal with CerebrasGPT-5.3-Codex-Spark Ships as First Model Running on Cerebras WSE-3 for OpenAIOklahoma City AI Datacenter Ribbon-Cutting with 44+ ExaflopsCS-3 vs. NVIDIA DGX B200 Blackwell Benchmarks Published
Sources (3)
Source Timeline
Cerebras February 2026 HighlightsCerebras·Nov 3, 2025
Evidence Strength
Evidence96%Authoritative
Backed by official company doc
Single publisher source
Includes official or primary source
Key Development
Transformative development (significance 9-10)
Covered by 3 sources
Confirmed — verified event
Insights
First tracked
November 3, 2025
Last updated
March 13, 2026
Sources
3 sources
Related Developments
Cerebras Delivers 3,000 Tokens/Second Inference for OpenAI's gpt-oss-120B Open-Weight ModelOpenAI Signs $10B+ Multiyear Compute Deal with CerebrasGPT-5.3-Codex-Spark Ships as First Model Running on Cerebras WSE-3 for OpenAIOklahoma City AI Datacenter Ribbon-Cutting with 44+ ExaflopsCS-3 vs. NVIDIA DGX B200 Blackwell Benchmarks Published