OpenAIgpt-5.1-codex

OpenAI: GPT-5.1-Codex API Pricing

GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution o...

Base Input Price$1.25/ 1M tokens

Base Output Price$10.00/ 1M tokens

Prompt Cache Read$0.130-89.6% discount

Batch API Rate-50%24h async offload

Inference Hosts & Aggregator Providers

Compare rates and latency across direct APIs, OpenRouter, and hyperscale cloud providers

Live verified rates

Provider Name	Input / 1M	Output / 1M	Prompt Caching	Access Endpoint
OpenAI Direct	$1.25	$10.00	Supported	Connect
OpenRouter	$1.25	$10.00	Supported	Connect

Head-to-Head Comparisons for OpenAI: GPT-5.1-Codex

OpenAI: GPT-5.1-Codex vs OpenAI: GPT-6.1 Sol$1.25/M vs $2/M

OpenAI: GPT-5.1-Codex vs GPT-4o (Omni)$1.25/M vs $2.5/M

OpenAI: GPT-5.1-Codex vs Claude 3.5 Sonnet$1.25/M vs $3/M

OpenAI: GPT-5.1-Codex vs DeepSeek-V3 (deepseek-chat)$1.25/M vs $0.27/M