Claude Opus 5.5Meta Llama 3.1 8B Instruct Turbov = 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
Meta Llama 3.1 8B Instruct Turbo$5.60 /month
Meta Llama 3.1 8B Instruct Turbo saves you $1,594 a month at this usage, $19,133 a year.
At a glance
Attribute
Claude Opus 5.5
Meta Llama 3.1 8B Instruct Turbo
Made by
Anthropic
Meta
Availability
Coming soon
Coming soon
Overall grade
Excellent · 99.5
Good · 0.0
Overall rank
#1 of 67
#67 of 67
Input price
$4.00 per 1M
$0.020 per 1M
Output price
$20.00 per 1M
$0.040 per 1M
Context window
1,000,000 tokens
131,072 tokens
Reasoning levels
Yes
No
Reads images
Yes
No
Model ID
claude-opus-5-5
meta-llama-3.1-8b-instruct-turbo
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.
# Ask either model the same thingcurlhttps://fullsendai.com/v1/chat/completions \-H"Authorization: Bearer $FULLSEND_API_KEY" \-d'{"model": "claude-opus-5-5", "messages": [...]}'# …then swap one word-d'{"model": "meta-llama-3.1-8b-instruct-turbo", "messages": [...]}'
Questions
Is Claude Opus 5.5 or Meta Llama 3.1 8B Instruct Turbo better?
Claude Opus 5.5 grades 99.5 against 0.0 for Meta Llama 3.1 8B Instruct Turbo, from public benchmarks.
Which is cheaper, Claude Opus 5.5 or Meta Llama 3.1 8B Instruct Turbo?
Meta Llama 3.1 8B Instruct Turbo: $0.020 in and $0.040 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.
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.
