bge-base-en-v1.5 vs GPT-5.1: side-by-side summary

bge-base-en-v1.5 and GPT-5.1 are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

bge-base-en-v1.5, from baai, has a 512-token context window and is priced at $0.005/M tokens on OpenRouter.

GPT-5.1, from OpenAI, has a 400,000-token context window and is priced at $1.25/M tokens input, $10/M tokens output on OpenRouter.

Context window

• bge-base-en-v1.5: 512 tokens
• GPT-5.1: 400,000 tokens

Price

• bge-base-en-v1.5: $0.005/M tokens
• GPT-5.1: $1.25/M tokens input, $10/M tokens output

Provided by

• bge-base-en-v1.5: baai
• GPT-5.1: OpenAI

• bge-base-en-v1.5 model details, providers and pricing
• GPT-5.1 model details, providers and pricing