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DeepSeek-V4-Pro vs GLM-5.1

DeepSeek · released

Wins 6 of 7 areas

Coding · Agents · Reasoning · Facts · Math · Long documents

Z.ai · released

Wins 0 of 7 areas

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DeepSeek-V4-Pro is the stronger all-rounder.

Scores updated · 69 tests both models report · How we compare

Where each one wins

Tests won in each of the seven 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
GLM-5.1$1.38 to read · $4.40 to write$5.78Price from Artificial Analysis

DeepSeek-V4-Pro costs 77% 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

  • Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+19.3points aheadDeepSeek-V4-Pro43GLM-5.123.7
  • Customer-service tasks in a simulated bankτ-Bench V3 · Banking+16.5points aheadDeepSeek-V4-Pro30.1GLM-5.113.6
  • Complex command-line tasks across many fieldsTerminal-Bench 4.0+12.6points aheadDeepSeek-V4-Pro14.6GLM-5.12

Where GLM-5.1 pulls ahead

  • Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+64.2points aheadGLM-5.170.1DeepSeek-V4-Pro5.9
  • Common-sense trick questionsSimpleBench+4.2points aheadGLM-5.155.1DeepSeek-V4-Pro50.9
  • Long, multi-file coding tasks in real codebasesSWE-bench Pro+3points aheadGLM-5.158.4DeepSeek-V4-Pro55.4

Every test, side by side

All 69 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

FactsDeepSeek-V4-Pro

Full facts ranking

MathDeepSeek-V4-Pro

Full math ranking

Long documentsDeepSeek-V4-Pro
  • AA-LCRDeepSeek-V4-Pro by 174.773.7+1

Full long documents ranking

Following instructionsEven

Full following instructions ranking

Other results42 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 GLM-5.1?

DeepSeek-V4-Pro wins six of the seven areas where both have results: coding, agents, reasoning, facts, math and long documents. GLM-5.1 wins none. They are level on following instructions.

Which is better for coding?

DeepSeek-V4-Pro. It wins 6 of the 8 coding tests both models report; GLM-5.1 wins 2.

Which is cheaper?

DeepSeek-V4-Pro costs $0.43 per million input tokens and $0.87 per million output tokens; GLM-5.1 costs $1.38 and $4.40. That makes DeepSeek-V4-Pro about 77% cheaper for the same work.

How do you compare the two?

We use the 69 benchmark tests both models have published scores on. The verdict counts the 27 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 42 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 GLM-5.1 with

Z.ai

Across the field

All comparisons