← Back to Directory

GPT-5.3-Codex

OPENAI Developer Architecture Profile

OpenRouter ↗HuggingFace ↗
Intelligence (ELO)1506Chatbot Arena Verified
Max Context400,000Tokens
API Cost / 1M$15.75Blended Prompt + Completion

Model Capabilities

  • Coding & Logic
  • Fictional
GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-art results...

Granular Pricing Matrix

Input Tokens (Prompt)$1.75 / 1M
Output Tokens (Completion)$14.00 / 1M

Pricing data via OpenRouter. Sync: 4/30/2026

Evaluate Competitors

VS Engine MatchupGPT-5.3-Codex vs OpenAI: GPT-5.2-CodexVS Engine MatchupGPT-5.3-Codex vs OpenAI: GPT-5.1-Codex-MaxVS Engine MatchupGPT-5.3-Codex vs OpenAI: GPT-4o (2024-08-06)VS Engine MatchupGPT-5.3-Codex vs OpenAI: GPT-5.5 ProVS Engine MatchupGPT-5.3-Codex vs OpenAI: GPT-5.4 ProVS Engine MatchupGPT-5.3-Codex vs OpenAI: GPT-5.2 Pro