Model comparison
Grok Code Fast 1 vs Nemotron 3 Ultra
Head-to-head evidence from 13 shared benchmark results across 5 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Verified leaderboard positions: Grok Code Fast 1 unranked; Nemotron 3 Ultra #24
BenchAlign evidence: Grok Code Fast 1 supported; Nemotron 3 Ultra not scored. Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Grok Code Fast 1 and Nemotron 3 Ultra share 13 comparable benchmark results. 1 of 8 categories are comparable. 0 results are unique to Grok Code Fast 1; 26 to Nemotron 3 Ultra.
Updated July 16, 2026- Shared results
- 13
- Grok Code Fast 1 only
- 0
- Nemotron 3 Ultra only
- 26
- Comparable categories
- 1 / 8
Pick Nemotron 3 Ultra if you want the stronger benchmark profile. Grok Code Fast 1 only becomes the better choice if coding is the priority or you would rather avoid the extra latency and token burn of a reasoning model.
Confidence note. This is a partial-evidence comparison with 13 shared benchmark results across 5 evidence categories; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Nemotron 3 Ultra is clearly ahead on the provisional aggregate, 60 to 41. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Grok Code Fast 1 is also the more expensive model on tokens at $0.20 input / $1.50 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Nemotron 3 Ultra. That is roughly Infinityx on output cost alone. Nemotron 3 Ultra is the reasoning model in the pair, while Grok Code Fast 1 is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. Nemotron 3 Ultra gives you the larger context window at 1M, compared with 256K for Grok Code Fast 1.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Grok Code Fast 1 | Δ | Nemotron 3 Ultra |
|---|---|---|---|
| Coding | Grok Code Fast 170.8 | Margin← 12.5 | Nemotron 3 Ultra58.3 |
| Agentic | Grok Code Fast 1Not measured | MarginNo overlap | Nemotron 3 Ultra51.3 |
| Reasoning | Grok Code Fast 1Not measured | MarginNo overlap | Nemotron 3 Ultra61.9 |
| Knowledge | Grok Code Fast 1Not measured | MarginNo overlap | Nemotron 3 Ultra54.2 |
| Multilingual | Grok Code Fast 1Not measured | MarginNo overlap | Nemotron 3 Ultra83.0 |
| Inst. Following | Grok Code Fast 1Not measured | MarginNo overlap | Nemotron 3 Ultra81.7 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
SWE-bench Verified
CodingA 70.8%B 71.9%Winner: Nemotron 3 UltraΔ 1.1SWE-bench Verified: Grok Code Fast 1 scored 70.8%; Nemotron 3 Ultra scored 71.9%. Nemotron 3 Ultra wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Grok Code Fast 1 | Nemotron 3 Ultra | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Grok Code Fast 1$0.2 input / $1.5 output | Nemotron 3 Ultra$0 input / $0 output | Nemotron 3 Ultra has the lower combined listed price. |
| Generation speedtokens per second | Grok Code Fast 1172 tok/s | Nemotron 3 UltraNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Grok Code Fast 12.81 s | Nemotron 3 UltraNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Grok Code Fast 1256K | Nemotron 3 Ultra1M | Nemotron 3 Ultra lists the larger context window. |
Benchmark Deep Dive
Agentic12 benchmarks
| Benchmark | Grok Code Fast 1 | Nemotron 3 Ultra | Result |
|---|---|---|---|
| τ²-bench resultsSource | 75.7% | 83.3% | Nemotron 3 Ultra leads |
| Terminal-Bench 2.0Source | — | 56.4% | Not comparable |
| PinchBenchSource | — | 90.0% | Not comparable |
| BrowseCompSource | — | 44.4% | Not comparable |
| τ³-bench resultsSource | — | 70.9% | Not comparable |
| GDPval-AASource | — | 33.2% | Not comparable |
| HLE w/ toolsSource | — | 37.4% | Not comparable |
| AA Agentic IndexSource | — | 27.4% | Not comparable |
| GDPval-AASource | — | 1164 | Not comparable |
| AA BriefcaseSource | — | 870 | Not comparable |
| AA EnterpriseOps-GymSource | — | 28.9% | Not comparable |
| AA Harvey LABSource | — | 3.3% | Not comparable |
CodingGrok Code Fast 1 wins8 benchmarks
| Benchmark | Grok Code Fast 1 | Nemotron 3 Ultra | Result |
|---|---|---|---|
| SWE-bench VerifiedSource | 70.8% | 71.9% | Nemotron 3 Ultra leads |
| Terminal-Bench HardSource | 17.4% | 36.4% | Nemotron 3 Ultra leads |
| AA-SciCodeSource | 36.2% | 39.9% | Nemotron 3 Ultra leads |
| SWE MultilingualSource | — | 67.7% | Not comparable |
| LiveCodeBench v6Source | — | 89.0% | Not comparable |
| SciCodeSource | — | 44.6% | Not comparable |
| Terminal-Bench 2.0Source | — | 56.4% | Not comparable |
| AA Coding IndexSource | — | 49.3% | Not comparable |
Reasoning3 benchmarks
Knowledge12 benchmarks
| Benchmark | Grok Code Fast 1 | Nemotron 3 Ultra | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 21.6% | 37.8% | Nemotron 3 Ultra leads |
| AA-GPQA DiamondSource | 72.7% | 86.7% | Nemotron 3 Ultra leads |
| AA-HLESource | 7.5% | 26.6% | Nemotron 3 Ultra leads |
| AA-Omniscience IndexSource | -36.0% | -0.8% | Nemotron 3 Ultra leads |
| AA-Omniscience AccuracySource | 23.8% | 21.6% | Grok Code Fast 1 leads |
| AA-Omniscience Hallucination RateSource | 78.5% | 28.5% | Nemotron 3 Ultra leads |
| GPQASource | — | 87% | Not comparable |
| GPQA-DSource | — | 87.0% | Not comparable |
| HLESource | — | 26.7% | Not comparable |
| HLE w/o toolsSource | — | 26.7% | Not comparable |
| MMLU-ProSource | — | 86.8% | Not comparable |
| AA Openness IndexSource | — | 83.3% | Not comparable |
Multilingual1 benchmarks
| Benchmark | Grok Code Fast 1 | Nemotron 3 Ultra | Result |
|---|---|---|---|
| MMLU-ProXSource | — | 83% | Not comparable |
Multimodal1 benchmarks
| Benchmark | Grok Code Fast 1 | Nemotron 3 Ultra | Result |
|---|---|---|---|
| Design Arena WebsiteSource | — | 1132 | Not comparable |
Frequently Asked Questions (2)
Which is better, Grok Code Fast 1 or Nemotron 3 Ultra?
Nemotron 3 Ultra is ahead on BenchLM's provisional leaderboard, 60 to 41. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 70.8% and 71.9%.
Which is better for coding, Grok Code Fast 1 or Nemotron 3 Ultra?
Grok Code Fast 1 has the edge for coding in this comparison, averaging 70.8 versus 58.3. Inside this category, Terminal-Bench Hard is the benchmark that creates the most daylight between them.
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