← Back to Directory

GPT-5.1-Codex-Mini

OPENAI Developer Architecture Profile

OpenRouter ↗HuggingFace ↗
Intelligence (ELO)1489Chatbot Arena Verified
Max Context Limit400,000Max Out: 128,000 tokens
Prompt Caching88% OFF$0.03 / 1M cached
Standard API / 1M$2.25Blended Standard Rate

Model Capabilities & Contract SLAs

  • Coding & Logic
  • Fictional
  • Drafting
  • Classification
  • Agentic
  • 📋 Strict JSON Schema
  • 🛠️ Native Tool Calling
GPT-5.1-Codex-Mini is a smaller and faster version of GPT-5.1-Codex

Granular Pricing Matrix

Input Tokens (Standard Prompt)$0.25 / 1M
⚡ Cached Input (Prompt Cache Read)88% OFF$0.03 / 1M
Output Tokens (Completion)$2.00 / 1M

Pricing data via OpenRouter. Sync: 10/2/2026

Evaluate Competitors

VS Engine MatchupGPT-5.1-Codex-Mini vs OpenAI: GPT-5.4 Pro (batch)VS Engine MatchupGPT-5.1-Codex-Mini vs OpenAI: GPT-5 MiniVS Engine MatchupGPT-5.1-Codex-Mini vs OpenAI: GPT-4o-miniVS Engine MatchupGPT-5.1-Codex-Mini vs OpenAI: GPT-4o (batch)VS Engine MatchupGPT-5.1-Codex-Mini vs Google: Gemini 3.1 Pro Preview (batch)VS Engine MatchupGPT-5.1-Codex-Mini vs OpenAI: GPT-5.2 (batch)