GPT-5.1-Codex-Mini vs Riverflow V2 Standard Preview: side-by-side summary

GPT-5.1-Codex-Mini and Riverflow V2 Standard Preview are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

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.

Riverflow V2 Standard Preview, from Sourceful, has a 8,192-token context window and is priced by the provider serving it on OpenRouter.

Context window

• GPT-5.1-Codex-Mini: 400,000 tokens
• Riverflow V2 Standard Preview: 8,192 tokens

Price

• GPT-5.1-Codex-Mini: $0.25/M tokens input, $2/M tokens output
• Riverflow V2 Standard Preview: Pricing varies by provider

Provided by

• GPT-5.1-Codex-Mini: OpenAI
• Riverflow V2 Standard Preview: Sourceful

• GPT-5.1-Codex-Mini model details, providers and pricing
• Riverflow V2 Standard Preview model details, providers and pricing