Inkling Small vs GPT-5.6 Sol Pro: side-by-side summary

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

Inkling Small, from thinkingmachines, has a 1,048,576-token context window and is priced at $0.45/M tokens input, $1.20/M tokens output on OpenRouter.

GPT-5.6 Sol Pro, from OpenAI, has a 1,050,000-token context window and is priced at $2.50/M tokens input, $15/M tokens output on OpenRouter.

Context window

• Inkling Small: 1,048,576 tokens
• GPT-5.6 Sol Pro: 1,050,000 tokens

Price

• Inkling Small: $0.45/M tokens input, $1.20/M tokens output
• GPT-5.6 Sol Pro: $2.50/M tokens input, $15/M tokens output

Provided by

• Inkling Small: thinkingmachines
• GPT-5.6 Sol Pro: OpenAI

• Inkling Small model details, providers and pricing
• GPT-5.6 Sol Pro model details, providers and pricing