Unverified50% confidenceFactExact time
Mainstream large model APIs (such as OpenAI and Anthropic) charge based on the number of input tokens, and every character in a tool definition is a billable unit.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
9/18/2026
First Seen
Valid until: 12/17/2026
Sources
Related Entities
Related Claims
VerifiedMainstream model providers such as OpenAI and Anthropic both adopt a two-way billing model of input tokens plus output tokens.79% similarUnverifiedThe billing unit for the OpenAI official API is the token; one token corresponds to approximately 0.75 English words or 0.5 Chinese characters, and input and output are billed separately.78% similarUnverifiedOpenAI的API采用Token计费机制，Token约等于3/4个英文单词或1-2个中文字78% similarUnverifiedOne API将数十种不同格式的大模型API统一转换成OpenAI兼容格式76% similarVerifiedOpenAI uses the tiktoken tokenizer for token metering.75% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/932573API
curl https://kongchang.com/api/v1/knowledge/claims/932573MCP
get_claim(id=932573)