# DeepSeek V4 Pro High Preview vs GPT-5.5

As of Oct 15, 2026, DeepSeek V4 Pro High Preview leads GPT-5.5 in 0 of 5 shared categories.

DeepSeek V4 Pro High Preview: price per 1M tokens is unset in the catalog.

GPT-5.5: $11.25 per 1M blended tokens.

DeepSeek V4 Pro High Preview: open weights.

GPT-5.5: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, GPT-5.5 leads DeepSeek V4 Pro High Preview in General LLM at #22 against #64.
- Which to pick, Reasoning: As of Oct 15, 2026, GPT-5.5 leads DeepSeek V4 Pro High Preview in Reasoning at #26 against #70.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, GPT-5.5 leads DeepSeek V4 Pro High Preview in Coding › Web dev at #48 against #59.
- Which to pick, Long context: As of Oct 15, 2026, GPT-5.5 leads DeepSeek V4 Pro High Preview in Long context at #26 against #62.
- Which to pick, Factuality: As of Oct 15, 2026, GPT-5.5 leads DeepSeek V4 Pro High Preview in Factuality at #5 against #63.

As of Oct 15, 2026, DeepSeek V4 Pro High Preview is ranked #59 in Coding › Web dev (since Oct 15, 2026; sources LMArena WebDev; methodology v1.0).

As of Oct 15, 2026, GPT-5.5 is near state of the art, rank #5 in Factuality (since Oct 15, 2026; sources LMArena Text factuality; methodology v1.0).