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Qwen3 Next 80B A3B Instruct vs Qwen3.5 397B A17B

Qwen3.5 397B A17B grades higher overall (65.4 against 62.5). Qwen3 Next 80B A3B Instruct costs 69% less for the same work, and both read a 256K-token context.

Qwen3 Next 80B A3B Instruct

by Qwen · #37 of 67 overall

Coming soon · price at launch
Context
256K
Input / 1M
$0.090
Output / 1M
$1.10

Qwen3.5 397B A17B

by Qwen · #35 of 67 overall

Coming soon · price at launch
Context
256K
Input / 1M
$0.45
Output / 1M
$3.00

Better overall

Qwen3.5 397B A17B

Grade 62.5 vs 65.4

Cheaper

Qwen3 Next 80B A3B Instruct

69% less, $0.34 vs $1.09 blended

Larger context

Same

256K vs 256K tokens

Head to head

Public benchmarks. Longer is better; each value links to its source.

LMArena TextElo-style rating · LMArena (CC BY 4.0) · Oct 15, 2026
Qwen3 Next 80B A3B InstructQwen3 Next 80B A3B Instruct: 1,399
Qwen3.5 397B A17BQwen3.5 397B A17B: 1,442
LMArena WebDevElo-style rating · LMArena (CC BY 4.0) · Oct 13, 2026
Qwen3 Next 80B A3B InstructQwen3 Next 80B A3B Instruct: —
Qwen3.5 397B A17BQwen3.5 397B A17B: 1,400
LMArena CodingElo-style rating · LMArena (CC BY 4.0) · Oct 15, 2026
Qwen3 Next 80B A3B InstructQwen3 Next 80B A3B Instruct: 1,444
Qwen3.5 397B A17BQwen3.5 397B A17B: 1,491
Aider Polyglot% of exercises solved · Aider (aider.chat) · Sep 9, 2025
Qwen3 Next 80B A3B InstructQwen3 Next 80B A3B Instruct: 49.8%v
Qwen3.5 397B A17BQwen3.5 397B A17B: —
SWE-bench Verified% of issues resolved · SWE-bench · Feb 16, 2026 · reference
Qwen3 Next 80B A3B InstructQwen3 Next 80B A3B Instruct: —
Qwen3.5 397B A17BQwen3.5 397B A17B: 76.4%v
Terminal-Bench 2.0% of tasks passed · Terminal-Bench · Feb 16, 2026 · reference
Qwen3 Next 80B A3B InstructQwen3 Next 80B A3B Instruct: —
Qwen3.5 397B A17BQwen3.5 397B A17B: 52.5%v
LiveCodeBenchpass@1, % · LiveCodeBench · Feb 16, 2026 · reference
Qwen3 Next 80B A3B InstructQwen3 Next 80B A3B Instruct: 56.6%v
Qwen3.5 397B A17BQwen3.5 397B A17B: 83.6%v

Qwen3 Next 80B A3B InstructQwen3.5 397B A17Bv = reported by the model’s maker. — = no public score yet. Arena bars span the range across every model we grade.

What it costs you

Drag to match your monthly usage.

Qwen3 Next 80B A3B Instruct$62.00 /month
Qwen3.5 397B A17B$210 /month

Qwen3 Next 80B A3B Instruct saves you $148 a month at this usage, $1,776 a year.

At a glance

AttributeQwen3 Next 80B A3B InstructQwen3.5 397B A17B
Made byQwenQwen
AvailabilityComing soonComing soon
Overall gradeStrong · 62.5Strong · 65.4
Overall rank#37 of 67#35 of 67
Input price$0.090 per 1M$0.45 per 1M
Output price$1.10 per 1M$3.00 per 1M
Context window262,144 tokens262,144 tokens
Reasoning levelsYesYes
Reads imagesNoYes
Model IDqwen3-next-80b-a3b-instructqwen3.5-397b-a17b

Try both with one key

Same endpoint, same key, both hosted in the USA. Change one word to switch models, in Claude Code, Cursor, Cline or your own code.

Get your API key
# Ask either model the same thing
curl https://fullsendai.com/v1/chat/completions \
  -H "Authorization: Bearer $FULLSEND_API_KEY" \
  -d '{"model": "qwen3-next-80b-a3b-instruct", "messages": [...]}'

# …then swap one word
  -d '{"model": "qwen3.5-397b-a17b", "messages": [...]}'

Questions

Is Qwen3 Next 80B A3B Instruct or Qwen3.5 397B A17B better?

Qwen3.5 397B A17B grades 65.4 against 62.5 for Qwen3 Next 80B A3B Instruct, from public benchmarks.

Which is cheaper, Qwen3 Next 80B A3B Instruct or Qwen3.5 397B A17B?

Qwen3 Next 80B A3B Instruct: $0.090 in and $1.10 out per million tokens, against $0.45 and $3.00 through FullsendAI.

Which has the larger context window?

Neither: both take 262,144 tokens.

Can I use both with one API key?

Yes, once they launch: both are coming soon, at the prices shown, and both will use the same FullsendAI key.

Compare with others

Model rankingsAll benchmarksCompare other models

Scores: LMArena (CC BY 4.0), Aider (aider.chat), SWE-bench, Terminal-Bench, LiveCodeBench, and model makers’ published results where marked v. Prices are FullsendAI’s, per million tokens. Data as of Oct 28, 2026.