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DeepSeek-V4-Flash vs Qwen3.8 Max Preview

DeepSeek · released

Wins 0 of 7 areas

—

Alibaba · released

Wins 6 of 7 areas

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

Qwen3.8 Max Preview is the stronger all-rounder.DeepSeek-V4-Flash is cheaper.

Scores updated · 39 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
Qwen3.8 Max Preview$2.00 to read · $6.00 to write$8.00Price from Artificial Analysis

DeepSeek-V4-Flash costs 78% 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 Qwen3.8 Max Preview pulls ahead

  • Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+62.9points aheadQwen3.8 Max Preview71.2DeepSeek-V4-Flash8.3
  • Complex command-line tasks across many fieldsTerminal-Bench 4.0+26.8points aheadQwen3.8 Max Preview38.9DeepSeek-V4-Flash12.1
  • Extremely hard research-level math problemsFrontierMath Tier 4+21.9points aheadQwen3.8 Max Preview46.3DeepSeek-V4-Flash24.4

Where DeepSeek-V4-Flash pulls ahead

  • Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+8.7points aheadDeepSeek-V4-Flash40.4Qwen3.8 Max Preview31.7
  • Programming problems, refreshed regularlyLiveBench · Coding+2.1points aheadDeepSeek-V4-Flash75Qwen3.8 Max Preview72.9

Every test, side by side

All 39 tests both models report. The winning score is in its model's colour; marks a score checked independently.

CodingQwen3.8 Max Preview

Full coding ranking

AgentsQwen3.8 Max Preview
  • Terminal-Bench 4.0Qwen3.8 Max Preview by 26.812.138.9+26.8
  • GDPValQwen3.8 Max Preview by 11.646.758.3+11.6
  • AA IT-Bench SREQwen3.8 Max Preview by 8.831.540.3+8.8
  • τ-Bench V3 · BankingQwen3.8 Max Preview by 8.439.447.8+8.4

Full agents ranking

ReasoningQwen3.8 Max Preview

Full reasoning ranking

FactsQwen3.8 Max Preview

Full facts ranking

MathQwen3.8 Max Preview

Full math ranking

Long documentsEven

Full long documents ranking

Following instructionsQwen3.8 Max Preview

Full following instructions ranking

Other results16 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 Qwen3.8 Max Preview?

Qwen3.8 Max Preview wins six of the seven areas where both have results: coding, agents, reasoning, facts, math and following instructions. DeepSeek-V4-Flash wins none, but costs 78% less. They are level on long documents.

Which is better for coding?

Qwen3.8 Max Preview. It wins 5 of the 6 coding tests both models report; DeepSeek-V4-Flash wins 1.

Which is cheaper?

DeepSeek-V4-Flash costs $0.44 per million input tokens and $1.32 per million output tokens; Qwen3.8 Max Preview costs $2.00 and $6.00. That makes DeepSeek-V4-Flash about 78% cheaper for the same work.

How do you compare the two?

We use the 39 benchmark tests both models have published scores on. The verdict counts the 23 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 16 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 Qwen3.8 Max Preview with

Alibaba

Across the field

All comparisons