OpenAI

GPT-5.3 Codex

Maker
OpenAI
Origin
United States
Released
Feb 5, 2026
Category
Coding & Agentic

Strengths & weaknesses

  • Excellent terminal automation, git operations, and CI/CD debugging
  • Far more token-efficient than reasoning-heavy rivals on routine tasks
  • Needs detailed, unambiguous instructions; struggles with vague requests
  • Smaller context window than some rivals, a constraint on huge monorepos

Evaluation

Awaiting evaluation
  • Code qualityw30—
  • Agentic autonomyw25—
  • Workflow fitw15—
  • Speedw10—
  • Cost efficiencyw10—
  • Privacy & controlw10—

w = weight, each criterion’s share of the overall score. How scoring works

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