NanoGPTGPT 5.1 Codex Mini model ID, context window & pricing
gpt-codex-mini
Quick facts
Model ID openai/gpt-5.1-codex-mini
Source NanoGPT
Context Window 400000
Pricing $0.25 input / $2.00 output per 1M tokens
Capabilities reasoning
Model overview
GPT 5.1 Codex Mini is an AI model from NanoGPT with 400000 token context window and text, image input support.
Published pricing is $0.25 input and $2.00 output per 1M tokens.
- Workloads that use text, image inputs with text outputs.
- Reasoning-heavy prompts where stepwise problem solving matters.
Model ID openai/gpt-5.1-codex-mini
Provider NanoGPT
Family gpt-codex-mini
Status -
Knowledge Cutoff -
Release Date 2025-11-13
Input Modalities text, image
Output Modalities text
Context Window 400000
Input Limit 400000
Output Limit 128000
Tool Calling No
Reasoning Yes
Structured Output No
Temperature Control -
Open Weights No
Input Cost / 1M tokens $0.25
Output Cost / 1M tokens $2.00
Reasoning Cost / 1M tokens -
Cache Read Cost / 1M tokens -
Cache Write Cost / 1M tokens -