OpenAIgpt-5.1-codex-max

OpenAI: GPT-5.1-Codex-Max API Pricing

GPT-5.1-Codex-Max is OpenAI’s latest agentic coding model, designed for long-running, high-context software development tasks. It is based on an updated version of the 5.1 reasoning stack and train...

Base Input Price$1.25/ 1M tokens

Base Output Price$10.00/ 1M tokens

Prompt Cache Read$0.125-90% 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-Max

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

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

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

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