GPT-5.6 Luna vs Nemotron 3 Ultra (550B A55B): Specs & Benchmark Comparison
| Characteristic | GPT-5.6 Luna | Nemotron 3 Ultra (550B A55B) |
|---|---|---|
| Company | OpenAI | NVIDIA |
| Release Date | July 9, 2026 | June 4, 2026 |
| Parameters | — | 550B |
| Multimodal | Yes | No |
| Context (input) | 1.1M | — |
| Context (output) | 128K | — |
| Input Price / 1M | $0.20 | — |
| Output Price / 1M | $1.20 | — |
| Average Score | 0.5 | 0.6 |
| Benchmarks | ||
| BrowseComp | 0.8 | 0.4 |
| Terminal-Bench 2.1 | 0.8 | 0.6 |
| GPQA | 0.9 | 0.9 |
Visual Benchmark Comparison
GPT-5.6 Luna
Nemotron 3 Ultra (550B A55B)
BrowseComp0.8 vs 0.4
0.8
0.4
Terminal-Bench 2.10.8 vs 0.6
0.8
0.6
GPQA0.9 vs 0.9
0.9
0.9
Verdict
GPT-5.6 Luna leads in 1 out of 2 comparison categories.
Overall Performance
Both models show comparable average scores: GPT-5.6 Luna — 0.5, Nemotron 3 Ultra (550B A55B) — 0.6.
Recency
GPT-5.6 Luna is newer: released 7/9/2026 vs 6/4/2026.
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Frequently Asked Questions
Which is better for coding — GPT-5.6 Luna or Nemotron 3 Ultra (550B A55B)?
Direct comparison on the SWE-Bench benchmark is not available. We recommend reviewing other metrics on the comparison page.
Which model is cheaper — GPT-5.6 Luna or Nemotron 3 Ultra (550B A55B)?
API pricing data is available on the individual model pages.
Which has a larger context window — GPT-5.6 Luna or Nemotron 3 Ultra (550B A55B)?
Context window data is available on the individual model pages.
The GPT-5.6 Luna and Nemotron 3 Ultra (550B A55B) comparison is updated for 2026. Data includes benchmark results, API pricing, context window size and other specifications. For more detailed information, visit the GPT-5.6 Luna or Nemotron 3 Ultra (550B A55B) page. See also the complete list of AI model comparisons.