NVIDIA Nemotron 3 Ultra 550B A55BQwen3.8 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.
NVIDIA Nemotron 3 Ultra 550B A55B$188 /month
Qwen3.8 27B$140 /month
Qwen3.8 27B saves you $48.00 a month at this usage, $576 a year.
At a glance
Attribute
NVIDIA Nemotron 3 Ultra 550B A55B
Qwen3.8 27B
Made by
NVIDIA
Qwen
Availability
Coming soon
Coming soon
Overall grade
Excellent · 72.8
Excellent · 74.4
Overall rank
#26 of 67
#25 of 67
Input price
$0.50 per 1M
$0.20 per 1M
Output price
$2.20 per 1M
$2.50 per 1M
Context window
262,144 tokens
262,144 tokens
Reasoning levels
No
Yes
Reads images
No
Yes
Model ID
nvidia-nemotron-3-ultra-550b-a55b
qwen3.8-27b
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.
# Ask either model the same thingcurlhttps://fullsendai.com/v1/chat/completions \-H"Authorization: Bearer $FULLSEND_API_KEY" \-d'{"model": "nvidia-nemotron-3-ultra-550b-a55b", "messages": [...]}'# …then swap one word-d'{"model": "qwen3.8-27b", "messages": [...]}'
Questions
Is NVIDIA Nemotron 3 Ultra 550B A55B or Qwen3.8 27B better?
They grade within two points of each other (72.8 and 74.4), so pick on price and the benchmarks that match your work.
Which is cheaper, NVIDIA Nemotron 3 Ultra 550B A55B or Qwen3.8 27B?
Qwen3.8 27B: $0.20 in and $2.50 out per million tokens, against $0.50 and $2.20 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.
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.
