Claude Opus 4.8 vs NVIDIA Nemotron 3 Ultra 550B-A55B NVFP4
| Spec | Claude Opus 4.8 | NVIDIA Nemotron 3 Ultra 550B-A55B NVFP4 |
|---|---|---|
| Respan Index | 55.8 (#18) | 28.8 (#86) |
| Blended price per 1M | $10 | $0.925 |
| Context window | 1M | 1M |
| Input / output per 1M | $5 / $25 | $0.5 / $2.2 |
| Max output | 128K | - |
| Input | text, vision | text |
| Released | 2026-05-28 | 2026-06-04 |
Respan Index by category
Each category is scored 0 to 100, and how far ahead the winner is. Leads under a point are close to even.
| Category | Claude Opus 4.8 | NVIDIA Nemotron 3 Ultra 550B-A55B NVFP4 |
|---|---|---|
| Coding | 39.6 Claude Opus 4.8 | 6.7 NVIDIA Nemotron 3 Ultra 550B-A55B NVFP4 |
| Agents | 64.6 Claude Opus 4.8 | 33.6 NVIDIA Nemotron 3 Ultra 550B-A55B NVFP4 |
| Reasoning | 64.9 Claude Opus 4.8 | 31.5 NVIDIA Nemotron 3 Ultra 550B-A55B NVFP4 |
| Knowledge & language | 52.5 Claude Opus 4.8 | 35.3 NVIDIA Nemotron 3 Ultra 550B-A55B NVFP4 |
| Human preference | 55.0 Claude Opus 4.8 | 49.0 NVIDIA Nemotron 3 Ultra 550B-A55B NVFP4 |
Benchmarks both report
Claude Opus 4.8 leads on 20 of the 21 benchmarks both report. Higher is better. Each score links to where it was published.
| Benchmark | Claude Opus 4.8 | NVIDIA Nemotron 3 Ultra 550B-A55B NVFP4 |
|---|---|---|
| Chess Puzzles (Epoch AI) | 52% | 12% |
| LMArena Elo | 1482 | 1427 |
| LMArena Agent (LMArena) | 0.0776 | -0.1576 |
| APEX-Agents (Mercor) | 48.9% | 22.7% |
| GPQA Diamond | 93.6% | 87.9% |
| LiveBench Agentic Coding (LiveBench) | 50.5% | 38.7% |
| LiveBench Coding (LiveBench) | 81.8% | 70.7% |
| LiveBench Data Analysis (LiveBench) | 66% | 54.5% |
| LiveBench Instruction Following (LiveBench) | 72% | 73.4% |
| LiveBench Language (LiveBench) | 79.7% | 70.8% |
| LiveBench Mathematics (LiveBench) | 94.3% | 88.7% |
| LiveBench Reasoning (LiveBench) | 89.2% | 74.7% |
| Mystery Game Puzzles (Epoch AI) | 36% | 20% |
| OTIS Mock AIME 2024-2025 (Epoch AI) | 98.3% | 86.7% |
| WeirdML (Håvard Tveit Ihle) | 82.9% | 43.5% |
| Toolathlon-Verified (HKUST) | 76.2% | 34.3% |
| SimpleBench (SimpleBench) | 64.8% | 41.7% |
| BrowseComp | 84.3% | 41.4% |
| Humanity's Last Exam (no tools) | 49.8% | 26.1% |
| SWE-bench Verified | 88.6% | 69.7% |
| Terminal-Bench 2.1 | 74.6% | 53.9% |
FAQ
Is Claude Opus 4.8 better than NVIDIA Nemotron 3 Ultra 550B-A55B NVFP4?
Claude Opus 4.8 scores 55.8 on the Respan Index (#18), ahead of NVIDIA Nemotron 3 Ultra 550B-A55B NVFP4 at 28.8 (#86). Claude Opus 4.8 leads on 20 of the 21 benchmarks both report.
Which is cheaper, Claude Opus 4.8 or NVIDIA Nemotron 3 Ultra 550B-A55B NVFP4?
Claude Opus 4.8 lists at $5 input and $25 output per 1M tokens; NVIDIA Nemotron 3 Ultra 550B-A55B NVFP4 at $0.5 and $2.2. NVIDIA Nemotron 3 Ultra 550B-A55B NVFP4 is 11x cheaper per token at list price.
Which has the larger context window?
Both accept 1M tokens of context.
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