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DeepSeek-V4-Pro vs GPT-5.1

DeepSeek · released

Wins 4 of 6 areas

Coding · Agents · Reasoning · Following instructions

OpenAI · released

Wins 1 of 6 areas

Long documents

DeepSeek-V4-Pro is the stronger all-rounder.GPT-5.1 is better at long documents.

Scores updated · 31 tests both models report · How we compare

Where each one wins

Tests won in each of the six areas where both have results. Each piece is one test, so a longer bar means more evidence; grey means the two scored within a point of each other.

Long documents and following instructions rest on a single test each.

What it costs

Prices per million tokens, roughly 750,000 words. The bars show the cost of a million tokens read plus a million written.

DeepSeek-V4-Pro$0.43 to read · $0.87 to write$1.30Price from Artificial Analysis
GPT-5.1$1.25 to read · $10.00 to write$11Price from Artificial Analysis

DeepSeek-V4-Pro costs 88% less for the same work.

The biggest differences

The three tests each model wins by the widest margin. Scores are out of 100.

Where DeepSeek-V4-Pro pulls ahead

  • Finds hard-to-locate facts by browsing the webBrowseComp+32.6points aheadDeepSeek-V4-Pro83.4GPT-5.150.8
  • Real work tasks from 44 professionsGDPVal+16.4points aheadDeepSeek-V4-Pro32.9GPT-5.116.5
  • Customer-service tasks in a simulated bankτ-Bench V3 · Banking+14.2points aheadDeepSeek-V4-Pro30.1GPT-5.115.9

Where GPT-5.1 pulls ahead

  • Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+42.2points aheadGPT-5.148.1DeepSeek-V4-Pro5.9
  • Reasons across sets of long documentsAA-LCR+5.3points aheadGPT-5.180DeepSeek-V4-Pro74.7
  • Common-sense trick questionsSimpleBench+2.3points aheadGPT-5.153.2DeepSeek-V4-Pro50.9

Every test, side by side

All 31 tests both models report. The winning score is in its model's colour; marks a score checked independently.

CodingDeepSeek-V4-Pro

Full coding ranking

AgentsDeepSeek-V4-Pro

Full agents ranking

ReasoningDeepSeek-V4-Pro

Full reasoning ranking

FactsEven

Full facts ranking

Long documentsGPT-5.1
  • AA-LCRGPT-5.1 by 5.374.780+5.3

Full long documents ranking

Following instructionsDeepSeek-V4-Pro
  • IFBenchDeepSeek-V4-Pro by 3.676.572.9+3.6

Full following instructions ranking

Other results12 tests, not counted

Tests outside the eight areas. They are not counted above: several are summary scores built from other tests, or the same test under another name.

Questions people ask

Which is better, DeepSeek-V4-Pro or GPT-5.1?

DeepSeek-V4-Pro wins four of the six areas where both have results: coding, agents, reasoning and following instructions. GPT-5.1 wins long documents. They are level on facts.

Which is better for coding?

DeepSeek-V4-Pro. It wins 5 of the 6 coding tests both models report; GPT-5.1 wins none, and 1 is a tie.

Which is cheaper?

DeepSeek-V4-Pro costs $0.43 per million input tokens and $0.87 per million output tokens; GPT-5.1 costs $1.25 and $10.00. That makes DeepSeek-V4-Pro about 88% cheaper for the same work.

How do you compare the two?

We use the 31 benchmark tests both models have published scores on. The verdict counts the 19 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 12 are listed but not counted, because several are summary scores or repeat a test. Each score is the one shown on the model's own page.

Compare DeepSeek-V4-Pro with

DeepSeek

Across the field

Compare GPT-5.1 with

OpenAI

Across the field

All comparisons