Codex 1
Proprietary
About
OpenAI's primary Codex model optimized for software engineering tasks. Built on o3, with 192K context window. Default model for the Codex cloud coding agent, available on Plus, Pro, Business, and Enterprise tiers.
Capabilities
VisionMultimodalReasoningFunction CallingTool UseJSON ModeCode Execution
Compare
All comparisons →Codex 1 vs Qwen2 7B InstructCodex 1 vs ShieldGemma 9BCodex 1 vs Dracarys Llama 3.1 70B InstructCodex 1 vs Gemma 2 9B SahabatAI InstructCodex 1 vs Llama 3 Taiwan 70B InstructCodex 1 vs Llama 3 Swallow 70B InstructCodex 1 vs Llama 3.1 Swallow 8B InstructCodex 1 vs Bielik 11B v2.6 InstructCodex 1 vs Sarvam-M Multilingual HybridCodex 1 vs Teuken 7B InstructCodex 1 vs Italia 10B InstructCodex 1 vs Colosseum 355B InstructCodex 1 vs Stockmark 2 100B InstructCodex 1 vs Seed-OSS 36B InstructCodex 1 vs Marin 8B InstructCodex 1 vs Granite Guardian 3.0 8B
Specifications
FamilyGPT-5 Codex
Released2025-05-16
Context192K
ArchitectureDecoder Only
Specializationcode-generation
LicenseProprietary
Trainingfinetuning
Created by
Cutting-edge research and development.
San Francisco, California, United States
Founded 2015
Website