AI model comparison
Compare recorded price, context, output limits, speed, latency, capabilities, and input/output support. Every missing value stays visible, and unsourced benchmarks are excluded.
Claude 3.5 Sonnet and Nemotron 3 Ultra 550B A55B both come up when teams are choosing a model for production work, and the honest answer usually depends on your workload rather than a leaderboard. This page puts their published specifications side by side — context window, token pricing, supported inputs and outputs — so you can see where they actually differ.
Anthropic
The 2024 Sonnet that set the standard for practical coding work — now well behind the current Claude line at identical pricing.
Accepts
Produces
NVIDIA
Largest Nemotron 3 model for maximum open-weight reasoning and agent accuracy
Accepts
Produces
At a glance
This is a directional summary of the values recorded in this directory—not a universal quality verdict. Test the finalists on your own prompts before committing.
Where Claude 3.5 Sonnet leads in recorded data
No complete recorded factor currently favors this model. That does not establish lower real-world quality.
Where Nemotron 3 Ultra 550B A55B leads in recorded data
Context capacity
Higher listed limit
Claude 3.5 Sonnet:200K
Nemotron 3 Ultra 550B A55B:1M
Nemotron 3 Ultra 550B A55B
Maximum output
Higher listed limit
Claude 3.5 Sonnet:8.2K
Nemotron 3 Ultra 550B A55B:128K
Nemotron 3 Ultra 550B A55B
Input price
Lower recorded price
Claude 3.5 Sonnet:$3.00
Nemotron 3 Ultra 550B A55B:$0.00
Nemotron 3 Ultra 550B A55B
Output price
Lower recorded price
Claude 3.5 Sonnet:$15.00
Nemotron 3 Ultra 550B A55B:$0.00
Nemotron 3 Ultra 550B A55B
Output speed
Higher recorded throughput
Claude 3.5 Sonnet:78 t/s
Nemotron 3 Ultra 550B A55B:—
No complete comparison
Time to first token
Lower recorded latency
Claude 3.5 Sonnet:0.60s
Nemotron 3 Ultra 550B A55B:—
No complete comparison
Intelligence Index
Higher directory index
Claude 3.5 Sonnet:80.1
Nemotron 3 Ultra 550B A55B:—
No complete comparison
Evidence
A score appears only when both records include a verified source. It is not treated as a universal ranking.
Specifications
| Specification | Claude 3.5 Sonnet | Nemotron 3 Ultra 550B A55B |
|---|---|---|
| Provider | Anthropic | NVIDIA |
| Model family | Claude 3.5 | nemotron |
| Accepted inputs | text, image | text |
| Produced outputs | text | text |
| Context window | 200K | 1MRecorded lead |
| Max output | 8.2K | 128KRecorded lead |
| Intelligence Index | 80.1 | — |
| Input price / 1M | $3.00 | $0.00Recorded lead |
| Output price / 1M | $15.00 | $0.00Recorded lead |
| Output speed | 78 t/s | — |
| Time to first token | 0.60s | — |
| Reasoning mode | Documented | Documented |
| Tool calling | Documented | Documented |
| Image input | Documented | Not documented |
| Audio input | Not documented | Not documented |
| Structured output | Documented | Not documented |
| License | Proprietary | Open weights |
| Released | Jun 20, 2024 | Jun 4, 2026 |
Workload guidance
On the published numbers, Nemotron 3 Ultra 550B A55B accepts the larger context window and Nemotron 3 Ultra 550B A55B is cheaper per input token. Which matters more depends on whether your bottleneck is document size or spend — the table above has the exact figures.
Provenance
Prices and hosted performance can change. SyncDev records source references and clearly separates documented specifications from measured values; confirm commercial terms with the provider before deployment.
Claude 3.5 Sonnet
Anthropic · model record and recorded source
Nemotron 3 Ultra 550B A55B
NVIDIA · model record and recorded source
Choose any two approved model records and review them with the same evidence rules.