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Claude Opus 5.5 vs Llama 4 Scout 17B 16E Instruct

Claude Opus 5.5 grades higher overall (99.5 against 36.5). Llama 4 Scout 17B 16E Instruct costs 98% less for the same work.

Claude Opus 5.5

by Anthropic · #1 of 67 overall

Coming soon · price at launch
Context
1M
Input / 1M
$4.00
Output / 1M
$20.00

Llama 4 Scout 17B 16E Instruct

by Meta · #57 of 67 overall

Coming soon · price at launch
Context
320K
Input / 1M
$0.10
Output / 1M
$0.30

Better overall

Claude Opus 5.5

Grade 99.5 vs 36.5

Cheaper

Llama 4 Scout 17B 16E Instruct

98% less, $0.15 vs $8.00 blended

Larger context

Claude Opus 5.5

1M vs 320K 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
Claude Opus 5.5Claude Opus 5.5: 1,508
Llama 4 Scout 17B 16E InstructLlama 4 Scout 17B 16E Instruct: 1,322
LMArena WebDevElo-style rating · LMArena (CC BY 4.0) · Oct 13, 2026
Claude Opus 5.5Claude Opus 5.5: 1,811
Llama 4 Scout 17B 16E InstructLlama 4 Scout 17B 16E Instruct: —
LMArena CodingElo-style rating · LMArena (CC BY 4.0) · Oct 15, 2026
Claude Opus 5.5Claude Opus 5.5: 1,545
Llama 4 Scout 17B 16E InstructLlama 4 Scout 17B 16E Instruct: 1,363
SWE-Bench Pro% of tasks resolved · Scale AI SWE-Bench Pro · Sep 22, 2026 · reference
Claude Opus 5.5Claude Opus 5.5: 89.9%v
Llama 4 Scout 17B 16E InstructLlama 4 Scout 17B 16E Instruct: —
Terminal-Bench 4.0% of tasks passed · Terminal-Bench · Sep 22, 2026 · reference
Claude Opus 5.5Claude Opus 5.5: 66.4%v
Llama 4 Scout 17B 16E InstructLlama 4 Scout 17B 16E Instruct: —

Claude Opus 5.5Llama 4 Scout 17B 16E Instructv = 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 Opus 5.5$1,600 /month
Llama 4 Scout 17B 16E Instruct$32.00 /month

Llama 4 Scout 17B 16E Instruct saves you $1,568 a month at this usage, $18,816 a year.

At a glance

AttributeClaude Opus 5.5Llama 4 Scout 17B 16E Instruct
Made byAnthropicMeta
AvailabilityComing soonComing soon
Overall gradeExcellent · 99.5Good · 36.5
Overall rank#1 of 67#57 of 67
Input price$4.00 per 1M$0.10 per 1M
Output price$20.00 per 1M$0.30 per 1M
Context window1,000,000 tokens327,680 tokens
Reasoning levelsYesNo
Reads imagesYesYes
Model IDclaude-opus-5-5llama-4-scout-17b-16e-instruct

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-opus-5-5", "messages": [...]}'

# …then swap one word
  -d '{"model": "llama-4-scout-17b-16e-instruct", "messages": [...]}'

Questions

Is Claude Opus 5.5 or Llama 4 Scout 17B 16E Instruct better?

Claude Opus 5.5 grades 99.5 against 36.5 for Llama 4 Scout 17B 16E Instruct, from public benchmarks.

Which is cheaper, Claude Opus 5.5 or Llama 4 Scout 17B 16E Instruct?

Llama 4 Scout 17B 16E Instruct: $0.10 in and $0.30 out per million tokens, against $4.00 and $20.00 through FullsendAI.

Which has the larger context window?

Claude Opus 5.5, 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.

Compare with others

Model rankingsAll benchmarksCompare other models

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