OpenAI: GPT-6 Sol vs DeepSeek: DeepSeek V4 Flash Vision Exp

For a sample job of 1 million input tokens and 250,000 output tokens, DeepSeek V4 Flash Vision Exp costs $0.38 and GPT-6 Sol costs $4.50, so DeepSeek V4 Flash Vision Exp is about 11.9 times cheaper for the same work.

Both take in a similar amount of text: 1,050,000 and 1,048,576 tokens, about 1,575 and 1,573 pages.

On our blended benchmark score GPT-6 Sol leads 81.2 to 57.7.

Across the 20 tasks where they differ, GPT-6 Sol scores higher on 13 (SQL Generation, Code Review, Code Refactoring and others), DeepSeek V4 Flash Vision Exp on 7 (Code Completion, Code Documentation, Regex Writing and others).

GPT-6 Sol was released in September 2026 and DeepSeek V4 Flash Vision Exp in August 2026.

Pick GPT-6 Sol if you need benchmark performance; pick DeepSeek V4 Flash Vision Exp if you need lower cost.

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