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GPT-6.1 Sol vs DeepSeek V4 Pro

GPT-6.1 SolOpenAI
DeepSeek V4 ProDeepSeek
Our take

GPT-6.1 Sol and DeepSeek V4 Pro trade wins evenly on our provisional scores, but DeepSeek V4 Pro is 2.0× cheaper for everyday text work. Pick GPT-6.1 Sol when quality matters most, DeepSeek V4 Pro at volume.

Overall74Best53
Coding78Best56
Writing5861Best
Support5859Best
Value64Best47
Input / 1M$2.00$1.32Best
Output / 1M$10.00$3.96Best
Blended / 1M$4.00$1.98Best
Context window1.1MBest1M
Open weightsNoYes
Released29 Sept 202613 Aug 2026

Your monthly bill

50k
GPT-6.1 Sol$800
DeepSeek V4 Pro$396Cheapest
List prices, a quarter of the tokens as output. Scores are provisional, from Arena and Epoch AI.