E5-Base-v2 vs GPT-5.1-Codex-Mini: side-by-side summary

E5-Base-v2 and GPT-5.1-Codex-Mini are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

E5-Base-v2, from intfloat, has a 512-token context window and is priced at $0.005/M tokens on OpenRouter.

GPT-5.1-Codex-Mini, from OpenAI, has a 400,000-token context window and is priced at $0.25/M tokens input, $2/M tokens output on OpenRouter.

Context window

• E5-Base-v2: 512 tokens
• GPT-5.1-Codex-Mini: 400,000 tokens

Price

• E5-Base-v2: $0.005/M tokens
• GPT-5.1-Codex-Mini: $0.25/M tokens input, $2/M tokens output

Provided by

• E5-Base-v2: intfloat
• GPT-5.1-Codex-Mini: OpenAI

• E5-Base-v2 model details, providers and pricing
• GPT-5.1-Codex-Mini model details, providers and pricing