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Claude Fable 5 vs Qwen3.5 397B A17B

Claude Fable 5 grades higher overall (90.7 against 65.4). Qwen3.5 397B A17B costs 95% less for the same work.

Claude Fable 5

by Anthropic · #3 of 67 overall

Coming soon · price at launch
Context
1M
Input / 1M
$10.00
Output / 1M
$50.00

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

Claude Fable 5

Grade 90.7 vs 65.4

Cheaper

Qwen3.5 397B A17B

95% less, $1.09 vs $20.00 blended

Larger context

Claude Fable 5

1M vs 256K tokens

SWE-bench Verified

Claude Fable 5

95% vs 76.4%

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
Claude Fable 5Claude Fable 5: 1,503
Qwen3.5 397B A17BQwen3.5 397B A17B: 1,442
LMArena WebDevElo-style rating · LMArena (CC BY 4.0) · Oct 13, 2026
Claude Fable 5Claude Fable 5: 1,624
Qwen3.5 397B A17BQwen3.5 397B A17B: 1,400
LMArena CodingElo-style rating · LMArena (CC BY 4.0) · Oct 15, 2026
Claude Fable 5Claude Fable 5: 1,551
Qwen3.5 397B A17BQwen3.5 397B A17B: 1,491
SWE-bench Verified% of issues resolved · SWE-bench · Jun 9, 2026 · reference
Claude Fable 5Claude Fable 5: 95%v
Qwen3.5 397B A17BQwen3.5 397B A17B: 76.4%v
SWE-Bench Pro% of tasks resolved · Scale AI SWE-Bench Pro · Jun 9, 2026 · reference
Claude Fable 5Claude Fable 5: 80%v
Qwen3.5 397B A17BQwen3.5 397B A17B: —
Terminal-Bench 2.1% of tasks passed · Terminal-Bench · Jun 9, 2026 · reference
Qwen3.5 397B A17BQwen3.5 397B A17B: —
Terminal-Bench 2.0% of tasks passed · Terminal-Bench · Feb 16, 2026 · reference
Claude Fable 5Claude Fable 5: —
Qwen3.5 397B A17BQwen3.5 397B A17B: 52.5%v
LiveCodeBenchpass@1, % · LiveCodeBench · Feb 16, 2026 · reference
Claude Fable 5Claude Fable 5: —
Qwen3.5 397B A17BQwen3.5 397B A17B: 83.6%v

Claude Fable 5Qwen3.5 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.

Claude Fable 5$4,000 /month
Qwen3.5 397B A17B$210 /month

Qwen3.5 397B A17B saves you $3,790 a month at this usage, $45,480 a year.

At a glance

AttributeClaude Fable 5Qwen3.5 397B A17B
Made byAnthropicQwen
AvailabilityComing soonComing soon
Overall gradeExcellent · 90.7Strong · 65.4
Overall rank#3 of 67#35 of 67
Input price$10.00 per 1M$0.45 per 1M
Output price$50.00 per 1M$3.00 per 1M
Context window1,000,000 tokens262,144 tokens
Reasoning levelsYesYes
Reads imagesYesYes
Model IDclaude-fable-5qwen3.5-397b-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": "claude-fable-5", "messages": [...]}'

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

Questions

Is Claude Fable 5 or Qwen3.5 397B A17B better?

Claude Fable 5 grades 90.7 against 65.4 for Qwen3.5 397B A17B, from public benchmarks.

Which is cheaper, Claude Fable 5 or Qwen3.5 397B A17B?

Qwen3.5 397B A17B: $0.45 in and $3.00 out per million tokens, against $10.00 and $50.00 through FullsendAI.

Which has the larger context window?

Claude Fable 5, with 1,000,000 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.

Model rankingsAll benchmarksCompare other models

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