GPT-5.6 Sol vs Step 3.7 Flash: side-by-side summary

GPT-5.6 Sol and Step 3.7 Flash are available through the OpenRouter API, so switching between them takes a model slug change rather than a new integration.

GPT-5.6 Sol, from OpenAI, has a 1,050,000-token context window and is priced at $2/M tokens input, $10/M tokens output on OpenRouter.

Step 3.7 Flash, from stepfun, has a 262,144-token context window and is priced at $0.20/M tokens input, $1.15/M tokens output on OpenRouter.

Context window

• GPT-5.6 Sol: 1,050,000 tokens
• Step 3.7 Flash: 262,144 tokens

Price

• GPT-5.6 Sol: $2/M tokens input, $10/M tokens output
• Step 3.7 Flash: $0.20/M tokens input, $1.15/M tokens output

Provided by

• GPT-5.6 Sol: OpenAI
• Step 3.7 Flash: stepfun

• GPT-5.6 Sol model details, providers and pricing
• Step 3.7 Flash model details, providers and pricing