Claude Sonnet 4vsNemotron 3 Ultra
Claude Sonnet 4 | Nemotron 3 Ultra | |
|---|---|---|
| Specifications | ||
ParametersA rough measure of how big the model is. More parameters usually means more capable and more expensive to run, though it is a poor guide on its own — a smaller, newer model often beats a larger, older one. | — | 550B |
| API pricingUSD per 1M tokens · lower wins | ||
Cheapest inputLowest input rate across third-party providers, excluding the lab itself. The cheapest endpoint may run a quantised build or a shorter context — see "Available from" on the model page. | $3.00Amazon Bedrock | — |
Cheapest outputLowest output rate across third-party providers, excluding the lab itself. May come from a different provider than the cheapest input. | $15.00Amazon Bedrock | — |
| Benchmarks | ||
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 75.4% | 86.7% |
| BenchmarksPublished by one model only | ||
BullshitBench v2Nonsense detection — Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | 30% | — |
SWE-Bench VerifiedCoding — Real coding tasks pulled from open-source projects — the AI has to find and fix actual bugs. A human-checked version of the original SWE-Bench. Higher is better. | 72.7% | — |
AA Intelligence IndexOverall intelligence — Artificial Analysis composite intelligence index across evals | — | 48 |
| Overview | ||
| Company | Anthropic | NVIDIA |
| Release date | May 22 2025 | Jun 4 2026 |
| Access | Proprietary | Open Source |
Other comparisons
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Frequently asked questions
Nemotron 3 Ultra leads Claude Sonnet 4 on 1 of the 1 benchmark they both report (GPQA Diamond). Claude Sonnet 4 shipped 378 days before Nemotron 3 Ultra, so benchmark comparisons should account for the intervening progress.
Claude Sonnet 4 is proprietary, while Nemotron 3 Ultra is open source.
On GPQA Diamond, Nemotron 3 Ultra leads at 86.7% vs Claude Sonnet 4 at 75.4%.
Claude Sonnet 4 was released by Anthropic on May 22 2025.
Nemotron 3 Ultra was released by NVIDIA on Jun 4 2026.
Nemotron 3 Ultra leads on GPQA Diamond — Claude Sonnet 4 75.4% vs Nemotron 3 Ultra 86.7%.
Claude Sonnet 4 is a proprietary model released by Anthropic. Nemotron 3 Ultra is an open source model released by NVIDIA.