# DeepSeek V4 Flash vs GPT-5.5

As of Oct 15, 2026, DeepSeek V4 Flash leads GPT-5.5 in 1 of 5 shared categories: Coding › Web dev.

DeepSeek V4 Flash: $0.11374999999999999 per 1M blended tokens.

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

DeepSeek V4 Flash: open weights.

GPT-5.5: closed weights.

- Which to pick, General LLM: As of Oct 15, 2026, GPT-5.5 leads DeepSeek V4 Flash in General LLM at #22 against #94.
- Which to pick, Reasoning: As of Oct 15, 2026, GPT-5.5 leads DeepSeek V4 Flash in Reasoning at #26 against #90.
- Which to pick, Coding › Web dev: As of Oct 15, 2026, DeepSeek V4 Flash leads GPT-5.5 in Coding › Web dev at #32 against #48.
- Which to pick, Long context: As of Oct 15, 2026, GPT-5.5 leads DeepSeek V4 Flash in Long context at #26 against #85.
- Which to pick, Factuality: As of Oct 15, 2026, GPT-5.5 leads DeepSeek V4 Flash in Factuality at #5 against #84.

As of Oct 15, 2026, DeepSeek V4 Flash is state of the art on best per dollar in General LLM (since Oct 14, 2026; sources LMArena Text (style-controlled, overall); 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).