Claude Sonnet 4.6 vs GPT-5.1

Anthropic · OpenAI — Interactive pricing comparison

Input tokens per request4K

Output tokens per request2K

Requests per day100

Anthropic

Input$3/1M

Output$15/1M

Cache read$0.3/1M

Cost per request$0.042

Monthly estimate$126

Max input1.0M

Max output64K

OpenAI

Input$1.25/1M

Output$10/1M

Cache read$0.13/1M

Cost per request$0.025

Monthly estimate$75.00

Max input272K

Max output128K

GPT-5.1 is 40% cheaper at this usage

Claude Sonnet 4.6 has a larger context window

Capabilities