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xAI Grok 4.20 VS Qwen Qwen3.5 Plus 2026-02-15

Grok 4.20 vs Qwen3.5 Plus 2026-02-15: which wins at real work?

22 task areas · same graded test runs · rank comparison only, so 0–100 and Elo collections never mix raw scores.

Qwen3.5 Plus 2026-02-15 wins 21 of 22 task areas we tested; Grok 4.20 takes 1. Qwen3.5 Plus 2026-02-15 costs 2.1× less per token ($1.82 vs $3.75 per 1M).

1
Task areas won
21
30
Avg percentile
68
0
Top-3 finishes
1
$3.75
Price / 1M tokens
$1.82
xAI
Provider
Qwen

Qwen3.5 Plus 2026-02-15 costs 2.1× less per token ($1.82 vs $3.75 per 1M).

Task by task

Task area Grok 4.20 Qwen3.5 Plus 2026-02-15 Winner
RAG, Safety & Grounding #96 / 113
Strong
#7 / 113
Excellent
Qwen3.5 Plus 2026-02-15
Translation & Localization #98 / 110
Strong
#10 / 110
Excellent
Qwen3.5 Plus 2026-02-15
Training & Education #88 / 110
Strong
#6 / 110
Excellent
Qwen3.5 Plus 2026-02-15
Data & Analytics #102 / 110
Excellent
#26 / 110
Excellent
Qwen3.5 Plus 2026-02-15
Legal & HR #87 / 110
Strong
#13 / 110
Excellent
Qwen3.5 Plus 2026-02-15
Content & Brand #118 / 124
Needs editing
#45 / 124
Strong
Qwen3.5 Plus 2026-02-15
Chef / Home Cooking #100 / 126
Needs editing
#40 / 126
Usable
Qwen3.5 Plus 2026-02-15
Sales #85 / 110
Usable
#27 / 110
Strong
Qwen3.5 Plus 2026-02-15
Customer Support #68 / 113
Usable
#18 / 113
Strong
Qwen3.5 Plus 2026-02-15
Summarization & Meeting Notes #85 / 110
Excellent
#46 / 110
Excellent
Qwen3.5 Plus 2026-02-15
Landing Pages #66 / 72
Usable
#36 / 72
Strong
Qwen3.5 Plus 2026-02-15
Structured Output #48 / 113
Excellent
#18 / 113
Excellent
Qwen3.5 Plus 2026-02-15
AI Strategy #59 / 126
Strong
#32 / 126
Strong
Qwen3.5 Plus 2026-02-15
Creative & Comedy #96 / 110 #71 / 110 Qwen3.5 Plus 2026-02-15
Investor & Pitch #59 / 66
Usable
#36 / 66
Usable
Qwen3.5 Plus 2026-02-15
Executive Assistant #83 / 112
Usable
#61 / 112
Strong
Qwen3.5 Plus 2026-02-15
Research & Competitive Analysis #52 / 110
Usable
#73 / 110
Usable
Grok 4.20
Knowledge & Docs #70 / 110
Usable
#51 / 110
Usable
Qwen3.5 Plus 2026-02-15
Product & Project Management #56 / 110
Strong
#40 / 110
Strong
Qwen3.5 Plus 2026-02-15
Coding #86 / 115
Usable
#71 / 115
Strong
Qwen3.5 Plus 2026-02-15
Frontend & Landing Pages #15 / 109
Needs editing
#3 / 109
Usable
Qwen3.5 Plus 2026-02-15
Presentations & Decks #46 / 110
Excellent
#40 / 110
Excellent
Qwen3.5 Plus 2026-02-15

Rank = position among every model config we tested in that task area (lower is better). Sorted by biggest gap first.

Frequently asked

Is Grok 4.20 better than Qwen3.5 Plus 2026-02-15?

Across 22 task areas we benchmarked, Qwen3.5 Plus 2026-02-15 ranks higher in 21 and Grok 4.20 in 1.

Which is cheaper, Grok 4.20 or Qwen3.5 Plus 2026-02-15?

Qwen3.5 Plus 2026-02-15 costs 2.1× less per token ($1.82 vs $3.75 per 1M).

What is Grok 4.20 better at?

Grok 4.20 out-ranks Qwen3.5 Plus 2026-02-15 at Research & Competitive Analysis.

What is Qwen3.5 Plus 2026-02-15 better at?

Qwen3.5 Plus 2026-02-15 out-ranks Grok 4.20 at RAG, Safety & Grounding, Translation & Localization, Training & Education.

Full Grok 4.20 review → Full Qwen3.5 Plus 2026-02-15 review → Full model leaderboard →

More comparisons

This page is Spring Prompt, running in public

We just did this for every model. Do it for your prompt.

The rankings above come from running real tasks through real models and scoring every output. Spring Prompt is that same engine — pointed at your prompt, your test cases, and your definition of good.

  • Generate test cases from your prompt — no eval set required to start.
  • Compare models side by side with quality, cost and latency in one matrix.
  • Optimise the winner until the scores say it's ready to ship.
Experiment · Cold outreach email

Prompt × model results

12 test cases · 3 evals
Claude Opus
GPT-5
Gemini
v1
7.1
6.8
7.4
v2
8.3
7.9
8.0
v3
9.2
8.6
8.4
Best combo: v3 × Claude Opus
9.2 quality · $0.004/run · 1.8s