OpenAIgpt-5.1

OpenAI: GPT-5.1 API Pricing

GPT-5.1 is the latest frontier-grade model in the GPT-5 series, offering stronger general-purpose reasoning, improved instruction adherence, and a more natural conversational style compared to GPT-...

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

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

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

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

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