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Qwen3.5 27B vs Qwen3.5 397B A17B

Alibaba · released

Wins 1 of 8 areas

Agents

Alibaba · released

Wins 6 of 8 areas

Coding · Reasoning · Images and charts · Math · Long documents · Following instructions

Qwen3.5 397B A17B is the stronger all-rounder.Qwen3.5 27B is cheaper and better at agents.

Scores updated · 55 tests both models report · How we compare

Where each one wins

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

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.

Qwen3.5 27B$0.30 to read · $2.40 to write$2.70Price from Artificial Analysis
Qwen3.5 397B A17B$0.60 to read · $3.60 to write$4.20Price from Alibaba's own price page

Qwen3.5 27B costs 36% less for the same work.

The biggest differences

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

Where Qwen3.5 397B A17B pulls ahead

  • Answers hard knowledge questions correctlyAA-Omniscience · Accuracy+10.1points aheadQwen3.5 397B A17B30.8Qwen3.5 27B20.7
  • Hard command-line tasks in a real terminalTerminal-Bench Hard+8.3points aheadQwen3.5 397B A17B40.9Qwen3.5 27B32.6
  • Finds hard-to-locate facts by browsing the webBrowseComp+8points aheadQwen3.5 397B A17B69Qwen3.5 27B61

Where Qwen3.5 27B pulls ahead

  • Real work tasks from 44 professionsGDPVal+18.2points aheadQwen3.5 27B33Qwen3.5 397B A17B14.8
  • Avoids making up answers it doesn't knowAA-Omniscience · Non-hallucination+7.4points aheadQwen3.5 27B18.5Qwen3.5 397B A17B11.1
  • Finds the root cause of IT system incidentsAA IT-Bench SRE+1.4points aheadQwen3.5 27B35.5Qwen3.5 397B A17B34.1

Every test, side by side

All 55 tests both models report. The winning score is in its model's colour; marks a score checked independently.

CodingQwen3.5 397B A17B

Full coding ranking

AgentsQwen3.5 27B

Full agents ranking

ReasoningQwen3.5 397B A17B

Full reasoning ranking

FactsEven

Full facts ranking

Images and chartsQwen3.5 397B A17B
  • MMMUQwen3.5 397B A17B by 2.782.385+2.7
  • LMArena · VisionQwen3.5 397B A17B by 24 rating points12401264+24 rating
  • MMMU-ProQwen3.5 397B A17B by 2.37577.3+2.3

Full images and charts ranking

MathQwen3.5 397B A17B

Full math ranking

Long documentsQwen3.5 397B A17B

Full long documents ranking

Following instructionsQwen3.5 397B A17B

Full following instructions ranking

Other results30 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, Qwen3.5 27B or Qwen3.5 397B A17B?

Qwen3.5 397B A17B wins six of the eight areas we test: coding, reasoning, images and charts, math, long documents and following instructions. Qwen3.5 27B wins agents, and costs 36% less. They are level on facts.

Which is better for coding?

Qwen3.5 397B A17B. It wins 5 of the 7 coding tests both models report; Qwen3.5 27B wins none, and 2 are ties.

Which is cheaper?

Qwen3.5 27B costs $0.30 per million input tokens and $2.40 per million output tokens; Qwen3.5 397B A17B costs $0.60 and $3.60. That makes Qwen3.5 27B about 36% cheaper for the same work.

How do you compare the two?

We use the 55 benchmark tests both models have published scores on. The verdict counts the 25 tests in the eight capability areas, and a gap under one point (ten on rating-style scales) counts as a tie. The other 30 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 Qwen3.5 27B with

Alibaba

Across the field

Compare Qwen3.5 397B A17B with

Alibaba

Across the field

All comparisons