DeepSeek V3.1 Nex N1 vs Step 3.5 Flash: side-by-side summary

DeepSeek V3.1 Nex N1 and Step 3.5 Flash are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

DeepSeek V3.1 Nex N1, from nex-agi, has a 8,192-token context window and is priced by the provider serving it on OpenRouter.

Step 3.5 Flash, from stepfun, has a 262,144-token context window and is priced at $0.10/M tokens input, $0.30/M tokens output on OpenRouter.

Context window

• DeepSeek V3.1 Nex N1: 8,192 tokens
• Step 3.5 Flash: 262,144 tokens

Price

• DeepSeek V3.1 Nex N1: Pricing varies by provider
• Step 3.5 Flash: $0.10/M tokens input, $0.30/M tokens output

Provided by

• DeepSeek V3.1 Nex N1: nex-agi
• Step 3.5 Flash: stepfun

• DeepSeek V3.1 Nex N1 model details, providers and pricing
• Step 3.5 Flash model details, providers and pricing