Compare AI models
| 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. | — | 30B |
Context windowHow much text the model can hold in mind at once — your question, any documents you attach, the conversation so far, and its own reply. Go past it and the earliest part falls out of view. | — | 1M |
| 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. | $15.00Amazon Bedrock | $0.045Wafer |
Cheapest outputLowest output rate across third-party providers, excluding the lab itself. May come from a different provider than the cheapest input. | $75.00Amazon Bedrock | $0.13Wafer |
| Benchmarks | ||
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. | 74.5% | 51.6% |
GPQA DiamondScience — Graduate-level science questions in biology, physics, and chemistry — hard enough that subject-matter PhDs score around 65%. Higher is better. | 80.9% | 75.4% |
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. | 43% | — |
| Overview | ||
| Company | Anthropic | NVIDIA |
| Release date | Aug 5 2025 | Aug 11 2026 |
| Access | Closed | Open Source |
| Model details | View model | View model |
Other comparisons
Claude Opus 4.1vsGPT-6.1 SolNemotron 3.5 LightningvsGPT-6.1 SolClaude Opus 4.1vsGemini 4 ArgonNemotron 3.5 LightningvsGemini 4 ArgonClaude Opus 4.1vsMuse Spark 1.3Nemotron 3.5 LightningvsMuse Spark 1.3Claude Opus 4.1vsGrok 4.7Nemotron 3.5 LightningvsGrok 4.7Claude Opus 4.1vsDeepSeek-V4.1-FlashNemotron 3.5 LightningvsDeepSeek-V4.1-FlashClaude Opus 4.1vsMistral Large 4Nemotron 3.5 LightningvsMistral Large 4Frequently asked questions
Claude Opus 4.1 leads Nemotron 3.5 Lightning on 2 of the 2 benchmarks they both report (SWE-Bench Verified, GPQA Diamond). Claude Opus 4.1 shipped 371 days before Nemotron 3.5 Lightning, so benchmark comparisons should account for the intervening progress.
Claude Opus 4.1 is closed, while Nemotron 3.5 Lightning is open source.
On SWE-Bench Verified, Claude Opus 4.1 leads at 74.5% vs Nemotron 3.5 Lightning at 51.6%. On GPQA Diamond, Claude Opus 4.1 leads at 80.9% vs Nemotron 3.5 Lightning at 75.4%.