SpaceXAI: Grok 4.6 vs OpenAI: GPT-5.6 Sol (batch)

For a sample job of 1 million input tokens and 250,000 output tokens, GPT-5.6 Sol (batch) costs $2.25 and Grok 4.6 costs $3.50, so GPT-5.6 Sol (batch) is about 1.6 times cheaper for the same work.

GPT-5.6 Sol (batch) reads up to 1,050,000 tokens at once, roughly 1,575 pages of text, against about 750 pages for Grok 4.6.

On our blended benchmark score GPT-5.6 Sol (batch) leads 80.2 to 75.3.

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

Grok 4.6 was released in August 2026 and GPT-5.6 Sol (batch) in July 2026.

Pick GPT-5.6 Sol (batch) if you need lower cost, long documents, benchmark performance or 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.