OpenAI: GPT-5.6 Terra Pro (batch) vs OpenAI: GPT-5.6 Sol (batch)

For a sample job of 1 million input tokens and 250,000 output tokens, GPT-5.6 Terra Pro (batch) costs $2.50 and GPT-5.6 Sol (batch) costs $4.50, so GPT-5.6 Terra Pro (batch) is about 1.8 times cheaper for the same work.

Both read up to 1,050,000 tokens at once, roughly 1,575 pages of text.

Across the 20 tasks where they differ, GPT-5.6 Sol (batch) on 20 (SQL Generation, Code Review, Code Completion and others).

Pick GPT-5.6 Terra Pro (batch) if you need lower cost; pick GPT-5.6 Sol (batch) if you need the stronger all-round task scores.

Costs use current list prices per million tokens; page counts assume about 0.75 words per token and 500 words per page.