GPT-5 Codex

OPENAI Developer Architecture Profile

Intelligence (ELO)1486Chatbot Arena Verified

Max Context400,000Tokens

API Cost / 1M$11.25Blended Prompt + Completion

Model Capabilities

Coding & Logic
Fictional

GPT-5-Codex is a specialized version of GPT-5 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....

Granular Pricing Matrix

Input Tokens (Prompt)$1.25 / 1M

Output Tokens (Completion)$10.00 / 1M

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

Evaluate Competitors

VS Engine MatchupGPT-5 Codex vs Google: Nano Banana Pro (Gemini 3 Pro Image Preview)VS Engine MatchupGPT-5 Codex vs OpenAI: GPT-4.1 VS Engine MatchupGPT-5 Codex vs Sao10K: Llama 3 8B Lunaris VS Engine MatchupGPT-5 Codex vs OpenAI: GPT-5.4 Image 2 VS Engine MatchupGPT-5 Codex vs OpenAI: GPT-5.4 Nano VS Engine MatchupGPT-5 Codex vs Nous: Hermes 4 405B