Agentic
Like-for-like- Grok 4.3
- 26.9
- Supported · #144/152
- Nemotron 3 Ultra
- 27.0
- Supported · #143/152
- Basis
- BenchAlign lane · 3 vs 6 public rows
- Reading
- Practical tie
Grok 4.3 vs Nemotron 3 Ultra
Updated September 10, 2026. Public scores include evidence status and uncertainty. They are not guarantees for a specific workload.
Decision reading
Grok 4.3 has the higher public score, 59.73 versus 40.51, and the 90% score intervals do not overlap.
5 results are shared. Category rows resting on Estimated evidence or different benchmark sets are marked directional and do not name a winner.
Share or export
Which one for your work
Recommendations appear only when a shared evidence basis or an explicit operating constraint supports the call. Secondary and unsupported use cases stay disclosed below the initial list.
Coding work
Code generation, repair, and software-engineering tasks
Grok 4.3
Grok 4.3 leads on the public coding lane, 33.6 to 26.6, with Supported evidence for both models, although the 90% intervals overlap.
Confidence: limited
Show secondary and unsupported calls
Agentic work
Tool use, computer use, and multi-step task completion
No clear pick
The like-for-like agentic result is a practical tie on the public lane (within 0.5 points).
Confidence: limited
Long documents
Prompts that approach the documented context limit
No clear pick
The documented context windows are equal.
Confidence: documented
Chat turn cost
1K fresh input + 500 output tokens
Not enough matched evidence
A complete comparable API-rate estimate is not available for both models.
Confidence: listed-rates
Cache-heavy agent loop cost
200K cached + 20K fresh input + 10K output tokens
Not enough matched evidence
A complete comparable API-rate estimate is not available for both models.
Confidence: listed-rates
Repository review cost
50K fresh input + 3K output tokens
Not enough matched evidence
A complete comparable API-rate estimate is not available for both models.
Confidence: listed-rates
What is actually comparable
Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.
2 Grok 4.3 only
5 Shared
19 Nemotron 3 Ultra only
- Shared results
- 5
- Grok 4.3 only
- 2
- Nemotron 3 Ultra only
- 19
- Like-for-like categories
- 2 / 8
2 categories rest on Estimated evidence or different evidence sets. Those rows remain visible for coverage context but do not name a winner.
Category results, on a stated basis
Each row shows the public-lane category score for both models: the BenchAlign lane for agentic, coding, and knowledge, and the weighted public rows elsewhere, with the same rank each model page reports. A row is like-for-like only when both scores rest on Supported evidence or the same weighted set. Directional and not-comparable rows remain visible, but they never receive a winner.
Coding
Like-for-like- Grok 4.3
- 33.6
- Supported · #131/151
- Nemotron 3 Ultra
- 26.6
- Supported · #145/151
- Basis
- BenchAlign lane · 2 vs 7 public rows
- Reading
- Grok 4.3 leads · intervals overlap
Knowledge
Directional only- Grok 4.3
- 57.0
- Supported · #44/183
- Nemotron 3 Ultra
- 44.7
- Estimated · #111/183
- Basis
- BenchAlign lane · 2 vs 7 public rows
- Reading
- Directional only
Instruction following
Directional only- Grok 4.3
- 94.4
- #2/123
- Nemotron 3 Ultra
- 88.8
- #28/123
- Basis
- Provisional lane · 0 vs 1 weighted rows
- Reading
- Directional only
Reasoning
Not comparable- Grok 4.3
- 65.2
- Unranked · 2 rankable rows
- Nemotron 3 Ultra
- 48.7
- Unranked · 1 rankable row
- Basis
- Provisional lane · 0 vs 1 weighted rows
- Reading
- Not comparable
Math
Not comparable- Grok 4.3
- Not ranked
- Nemotron 3 Ultra
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
Multilingual
Not comparable- Grok 4.3
- Not ranked
- Nemotron 3 Ultra
- 47.4
- #7/12
- Basis
- Provisional lane · 0 vs 1 weighted rows
- Reading
- Not comparable
Multimodal
Not comparable- Grok 4.3
- 65.6
- #25/48
- Nemotron 3 Ultra
- Not ranked
- Basis
- Provisional lane · 0 vs 0 weighted rows
- Reading
- Not comparable
| Category | Grok 4.3 | Nemotron 3 Ultra | Basis | Reading |
|---|---|---|---|---|
| Agentic | 26.9Supported · #144/152 | 27.0Supported · #143/152 | Like-for-likeBenchAlign lane · 3 vs 6 public rows | Practical tie |
| Coding | 33.6Supported · #131/151 | 26.6Supported · #145/151 | Like-for-likeBenchAlign lane · 2 vs 7 public rows | Grok 4.3 leads · intervals overlap |
| Knowledge | 57.0Supported · #44/183 | 44.7Estimated · #111/183 | Directional onlyBenchAlign lane · 2 vs 7 public rows | Directional only |
| Instruction following | 94.4#2/123 | 88.8#28/123 | Directional onlyProvisional lane · 0 vs 1 weighted rows | Directional only |
| Reasoning | 65.2Unranked · 2 rankable rows | 48.7Unranked · 1 rankable row | Not comparableProvisional lane · 0 vs 1 weighted rows | Not comparable |
| Math | Not ranked | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
| Multilingual | Not ranked | 47.4#7/12 | Not comparableProvisional lane · 0 vs 1 weighted rows | Not comparable |
| Multimodal | 65.6#25/48 | Not ranked | Not comparableProvisional lane · 0 vs 0 weighted rows | Not comparable |
Ranks count the models scored in each category’s lane, so the agentic, coding, and knowledge denominators (BenchAlign) differ from the provisional-lane categories. Unranked scores sit on the lane’s scale but never name a winner. Like-for-like rows within 0.5 points read as a practical tie.
Shape of the matched evidence
Only shared public evidence is shown. Sparse evidence stays a ruled list rather than being closed into a radar shape.
Too few matched category axes support a radar. The ruled list below shows only shared benchmark results; positions use each benchmark’s normalized display scale when available.
LiveCodeBench (Vals)
Coding
What each workload costs
Three fixed token mixes turn per-token rates into comparable decisions. Each scenario states context fit and whether cached input had to fall back to the published list-input rate.
Chat turn
1K fresh input + 500 output tokens
- Grok 4.3
- $0.0025
- Fits in one request
- Nemotron 3 Ultra
- Self-hosted; infrastructure cost varies
- Fits in one request
Nemotron 3 Ultra has no comparable published API token rate.
Repository review
50K fresh input + 3K output tokens
- Grok 4.3
- $0.07
- Fits in one request
- Nemotron 3 Ultra
- Self-hosted; infrastructure cost varies
- Fits in one request
Nemotron 3 Ultra has no comparable published API token rate.
Cache-heavy agent loop
200K cached + 20K fresh input + 10K output tokens
- Grok 4.3
- $0.09
- Fits in one request
- Nemotron 3 Ultra
- Self-hosted; infrastructure cost varies
- Fits in one request
- Cached-input rate unavailable
Nemotron 3 Ultra has no comparable published API token rate.
Specification differences
Sourced differences are shown directly. Missing facts stay explicit instead of being inferred from a model name or family.
SpecificationGrok 4.3Nemotron 3 Ultra
Context window
Maximum documented context; output-token limits may be lower.
Grok 4.3
1M
Nemotron 3 Ultra
1M
API model ID
Grok 4.3
Not sourced
Nemotron 3 Ultra
Not sourced
Cached-input rate
A missing cached-input rate falls back to the listed input rate only in the stated workload estimate.
Grok 4.3
$0.2 per 1M cached input tokens
Nemotron 3 Ultra
No comparable hosted API rate
Documented inputs
Grok 4.3
Not sourced
Nemotron 3 Ultra
Not sourced
Documented outputs
Grok 4.3
Not sourced
Nemotron 3 Ultra
Not sourced
Provider availability
Grok 4.3
Not sourced
Nemotron 3 Ultra
Not sourced
Reasoning profile
Grok 4.3
Reasoning
Nemotron 3 Ultra
Reasoning
Weight access
Grok 4.3
Proprietary
Nemotron 3 Ultra
Open Weight
License
Grok 4.3
Proprietary
Nemotron 3 Ultra
Open Weight
Release date
Grok 4.3
2026-04-30
Nemotron 3 Ultra
2026-06-04
If you already use one of these models
- Deployment change
- The models list different providers, so authentication, endpoint behavior, limits, and feature support may change.
- Quality signal
- Grok 4.3 has the higher public score, 59.73 versus 40.51, and the 90% score intervals do not overlap.
- Workload cost
- A complete comparable API-rate estimate is not available for both models.
- Context tradeoff
- Both models list 1M.
Run the same representative tasks against both endpoints before changing production traffic.
Benchmark evidence
The full public result ledger is available for audit without forcing a wide desktop table onto a phone.
Browse raw public benchmark evidence26 rows
Agentic
Gert Labs
Grok 4.343.86%SourceNemotron 3 Ultra—Not directly comparable
ResearchClawBench
Grok 4.312.4%SourceNemotron 3 Ultra—Not directly comparable
Terminal-Bench 2.1 (Vals)
Grok 4.341.9%SourceNemotron 3 Ultra50.9%SourceNemotron 3 Ultra leads this result
Terminal-Bench 2.0
Grok 4.3—Nemotron 3 Ultra56.4%SourceNot directly comparable
PinchBench
Grok 4.3—Nemotron 3 Ultra90.0%SourceNot directly comparable
BrowseComp
Grok 4.3—Nemotron 3 Ultra44.4%SourceNot directly comparable
τ³-bench results
Grok 4.3—Nemotron 3 Ultra70.9%SourceNot directly comparable
HLE w/ tools
Grok 4.3—Nemotron 3 Ultra37.4%SourceNot directly comparable
Coding
LiveCodeBench (Vals)
Grok 4.384.5%SourceNemotron 3 Ultra86.0%SourceNemotron 3 Ultra leads this result
SWE-bench (Vals)
Grok 4.371.4%SourceNemotron 3 Ultra69.0%SourceGrok 4.3 leads this result
SWE-bench Verified
Grok 4.3—Nemotron 3 Ultra71.9%SourceNot directly comparable
SWE Multilingual
Grok 4.3—Nemotron 3 Ultra67.7%SourceNot directly comparable
LiveCodeBench v6
Grok 4.3—Nemotron 3 Ultra89.0%SourceNot directly comparable
SciCode
Grok 4.3—Nemotron 3 Ultra44.6%SourceNot directly comparable
Terminal-Bench 2.0
Grok 4.3—Nemotron 3 Ultra56.4%SourceNot directly comparable
Reasoning
Knowledge
GPQA Diamond (Vals)
Grok 4.391.4%SourceNemotron 3 Ultra86.1%SourceGrok 4.3 leads this result
MMLU-Pro (Vals)
Grok 4.385.8%SourceNemotron 3 Ultra85.8%SourceTie
GPQA
Grok 4.3—Nemotron 3 Ultra87%SourceNot directly comparable
GPQA-D
Grok 4.3—Nemotron 3 Ultra87.0%SourceNot directly comparable
HLE
Grok 4.3—Nemotron 3 Ultra26.7%SourceNot directly comparable
HLE w/o tools
Grok 4.3—Nemotron 3 Ultra26.7%SourceNot directly comparable
MMLU-Pro
Grok 4.3—Nemotron 3 Ultra86.8%SourceNot directly comparable
Multilingual
MMLU-ProX
Grok 4.3—Nemotron 3 Ultra83%SourceNot directly comparable
Instruction following
IFBench
Grok 4.3—Nemotron 3 Ultra81.7%SourceNot directly comparable
Frequently asked questions
Which is better, Grok 4.3 or Nemotron 3 Ultra?
Grok 4.3 has the higher public score, 59.73 versus 40.51, and the 90% score intervals do not overlap. That is the clearest overall quality signal in the current public data.
Which is better for coding, Grok 4.3 or Nemotron 3 Ultra?
Grok 4.3 leads the public coding lane, 33.6 to 26.6, with Supported evidence for both models, although the 90% intervals overlap.
Which is better for agentic tasks, Grok 4.3 or Nemotron 3 Ultra?
The like-for-like agentic tasks row is a practical tie on the public lane, 26.9 against 27, inside the 0.5-point band BenchLM treats as level.
Which costs less, Grok 4.3 or Nemotron 3 Ultra?
Both models do not have comparable published API token rates, so this page does not name a universal price winner.
Which has the larger context window, Grok 4.3 or Nemotron 3 Ultra?
Both models list the same context window, 1M.
Related comparisons
Last updated September 10, 2026
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