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Claude Haiku 4.5 vs Qwen3.5 27B

Claude Haiku 4.5 grades higher overall (57.0 against 54.6). Qwen3.5 27B costs 58% less for the same work.

Claude Haiku 4.5

by Anthropic · #42 of 67 overall

Coming soon · price at launch
Context
195K
Input / 1M
$1.00
Output / 1M
$5.00

Qwen3.5 27B

by Qwen · #45 of 67 overall

Coming soon · price at launch
Context
256K
Input / 1M
$0.26
Output / 1M
$2.60

Better overall

Claude Haiku 4.5

Grade 57.0 vs 54.6

Cheaper

Qwen3.5 27B

58% less, $0.84 vs $2.00 blended

Larger context

Qwen3.5 27B

195K vs 256K tokens

SWE-bench Verified

Claude Haiku 4.5

73.3% vs 72.4%

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
LMArena WebDevElo-style rating · LMArena (CC BY 4.0) · Oct 13, 2026
LMArena CodingElo-style rating · LMArena (CC BY 4.0) · Oct 15, 2026
SWE-bench Verified% of issues resolved · SWE-bench · Feb 24, 2026 · reference
Terminal-Bench 2.0% of tasks passed · Terminal-Bench · Feb 24, 2026 · reference
Claude Haiku 4.5Claude Haiku 4.5: —
LiveCodeBenchpass@1, % · LiveCodeBench · Feb 24, 2026 · reference
Claude Haiku 4.5Claude Haiku 4.5: —

Claude Haiku 4.5Qwen3.5 27Bv = 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 Haiku 4.5$400 /month
Qwen3.5 27B$156 /month

Qwen3.5 27B saves you $244 a month at this usage, $2,928 a year.

At a glance

AttributeClaude Haiku 4.5Qwen3.5 27B
Made byAnthropicQwen
AvailabilityComing soonComing soon
Overall gradeStrong · 57.0Good · 54.6
Overall rank#42 of 67#45 of 67
Input price$1.00 per 1M$0.26 per 1M
Output price$5.00 per 1M$2.60 per 1M
Context window200,000 tokens262,144 tokens
Reasoning levelsYesYes
Reads imagesYesYes
Model IDclaude-haiku-4-5qwen3.5-27b

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-haiku-4-5", "messages": [...]}'

# …then swap one word
  -d '{"model": "qwen3.5-27b", "messages": [...]}'

Questions

Is Claude Haiku 4.5 or Qwen3.5 27B better?

Claude Haiku 4.5 grades 57.0 against 54.6 for Qwen3.5 27B, from public benchmarks.

Which is cheaper, Claude Haiku 4.5 or Qwen3.5 27B?

Qwen3.5 27B: $0.26 in and $2.60 out per million tokens, against $1.00 and $5.00 through FullsendAI.

Which has the larger context window?

Qwen3.5 27B, with 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.

Model rankingsAll benchmarksCompare other models

Scores: LMArena (CC BY 4.0), 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.