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DeepSeek-V4.1-Flash vs DeepSeek-V4-Flash

DeepSeek · released

Wins 7 of 7 areas

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

DeepSeek · released

Wins 0 of 7 areas

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DeepSeek-V4.1-Flash is the stronger all-rounder.DeepSeek-V4-Flash is cheaper.

Scores updated · 32 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-V4.1-Flash$0.30 to read · $1.20 to write$1.50Price from Artificial Analysis
DeepSeek-V4-Flash$0.14 to read · $0.28 to write$0.42Price from Artificial Analysis

DeepSeek-V4-Flash costs 72% less for the same work.

The biggest differences

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

Where DeepSeek-V4.1-Flash pulls ahead

  • Fixes real GitHub issues, working as an agentLiveBench · Agentic Coding+30.5points aheadDeepSeek-V4.1-Flash77.3DeepSeek-V4-Flash46.8
  • Extremely hard research-level math problemsFrontierMath Tier 4+21.9points aheadDeepSeek-V4.1-Flash46.3DeepSeek-V4-Flash24.4
  • Common-sense trick questionsSimpleBench+20.4points aheadDeepSeek-V4.1-Flash66.7DeepSeek-V4-Flash46.3

Where DeepSeek-V4-Flash pulls ahead

  • Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+4.8points aheadDeepSeek-V4-Flash8.3DeepSeek-V4.1-Flash3.5
  • Research-level physics problemsCritPt+2.3points aheadDeepSeek-V4-Flash16.6DeepSeek-V4.1-Flash14.3

Every test, side by side

All 32 tests both models report. The winning score is in its model's colour; marks a score checked independently.

CodingDeepSeek-V4.1-Flash

Full coding ranking

AgentsDeepSeek-V4.1-Flash
  • AA IT-Bench SREDeepSeek-V4.1-Flash by 15.446.931.5+15.4
  • Terminal-Bench 4.0DeepSeek-V4.1-Flash by 14.726.812.1+14.7
  • GDPValDeepSeek-V4.1-Flash by 8.35546.7+8.3

Full agents ranking

ReasoningDeepSeek-V4.1-Flash

Full reasoning ranking

FactsDeepSeek-V4.1-Flash

Full facts ranking

MathDeepSeek-V4.1-Flash

Full math ranking

Long documentsDeepSeek-V4.1-Flash
  • AA-LCRDeepSeek-V4.1-Flash by 4.38479.7+4.3

Full long documents ranking

Following instructionsDeepSeek-V4.1-Flash

Full following instructions ranking

Other results10 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-V4.1-Flash or DeepSeek-V4-Flash?

DeepSeek-V4.1-Flash wins all seven areas where both have results: coding, agents, reasoning, facts, math, long documents and following instructions. DeepSeek-V4-Flash wins none, but costs 72% less.

Which is better for coding?

DeepSeek-V4.1-Flash. It wins 5 of the 5 coding tests both models report; DeepSeek-V4-Flash wins none.

Which is cheaper?

DeepSeek-V4.1-Flash costs $0.30 per million input tokens and $1.20 per million output tokens; DeepSeek-V4-Flash costs $0.14 and $0.28. That makes DeepSeek-V4-Flash about 72% cheaper for the same work.

How do you compare the two?

We use the 32 benchmark tests both models have published scores on. The verdict counts the 22 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 10 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-V4.1-Flash with

DeepSeek

Across the field

Compare DeepSeek-V4-Flash with

DeepSeek

Across the field

All comparisons