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DeepSeek-V4-Flash vs Gemini 3.1 Pro

DeepSeek · released

Wins 1 of 7 areas

Agents

Google · released

Wins 5 of 7 areas

Coding · Reasoning · Facts · Math · Long documents

Gemini 3.1 Pro is the stronger all-rounder.DeepSeek-V4-Flash is cheaper and better at agents.

Scores updated · 62 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 rests on a single test.

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-Flash$0.44 to read · $1.32 to write$1.76Price from Artificial Analysis
Gemini 3.1 Pro$2.00 to read · $12.00 to write$14Price from Artificial Analysis

DeepSeek-V4-Flash costs 87% less for the same work.

The biggest differences

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

Where Gemini 3.1 Pro pulls ahead

  • Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+40.8points aheadGemini 3.1 Pro49.1DeepSeek-V4-Flash8.3
  • Short factual questions, answered correctlySimpleQA Verified+39.4points aheadGemini 3.1 Pro73.5DeepSeek-V4-Flash34.1
  • Common-sense trick questionsSimpleBench+33.3points aheadGemini 3.1 Pro79.6DeepSeek-V4-Flash46.3

Where DeepSeek-V4-Flash pulls ahead

  • Real work tasks from 44 professionsGDPVal+32.2points aheadDeepSeek-V4-Flash46.9Gemini 3.1 Pro14.7
  • Customer-service tasks in a simulated bankτ-Bench V3 · Banking+18points aheadDeepSeek-V4-Flash39.4Gemini 3.1 Pro21.4
  • Complex command-line tasks across many fieldsTerminal-Bench 4.0+8.1points aheadDeepSeek-V4-Flash12.1Gemini 3.1 Pro4

Every test, side by side

All 62 tests both models report. The winning score is in its model's colour; marks a score checked independently.

CodingGemini 3.1 Pro

Full coding ranking

AgentsDeepSeek-V4-Flash

Full agents ranking

ReasoningGemini 3.1 Pro

Full reasoning ranking

FactsGemini 3.1 Pro

Full facts ranking

MathGemini 3.1 Pro

Full math ranking

Long documentsGemini 3.1 Pro
  • AA-LCRGemini 3.1 Pro by 2.379.782+2.3

Full long documents ranking

Following instructionsEven

Full following instructions ranking

Other results28 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-Flash or Gemini 3.1 Pro?

Gemini 3.1 Pro wins five of the seven areas where both have results: coding, reasoning, facts, math and long documents. DeepSeek-V4-Flash wins agents, and costs 87% less. They are level on following instructions.

Which is better for coding?

Gemini 3.1 Pro. It wins 8 of the 10 coding tests both models report; DeepSeek-V4-Flash wins 2.

Which is cheaper?

DeepSeek-V4-Flash costs $0.44 per million input tokens and $1.32 per million output tokens; Gemini 3.1 Pro costs $2.00 and $12.00. That makes DeepSeek-V4-Flash about 87% cheaper for the same work.

How do you compare the two?

We use the 62 benchmark tests both models have published scores on. The verdict counts the 34 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 28 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-Flash with

DeepSeek

Across the field

Compare Gemini 3.1 Pro with

Google

Across the field

All comparisons