Long documents
Prompts that approach the documented context limit
Nemotron 3 Ultra
Nemotron 3 Ultra has the larger documented context window.
Confidence: documented
Claude Opus 4.5 vs Nemotron 3 Ultra
Updated October 14, 2026. Rank says Claude Opus 4.5 is ahead. Price, access, and your workload can each overturn that. Public scores include evidence status and uncertainty.
Both of these models will change. Get the price, version and retirement notices for the pair, each with its source. Follow model changes
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Decision reading
Claude Opus 4.5 has the higher public point estimate, 54.05 versus 47.25. Their conditional score ranges overlap. These ranges do not establish rank confidence. 10 results are shared. Category rows resting on Estimated evidence or different benchmark sets are marked directional and do not name a winner.
- Shared results
- 10
- Claude Opus 4.5 only
- 51
- Nemotron 3 Ultra only
- 14
- Like-for-like categories
- 2 / 8
Supported: Claude Opus 4.5 · Estimated: Nemotron 3 Ultra. Conditional ranges do not establish rank confidence.How the comparison works
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.
Show secondary and unsupported calls
Coding work
Code generation, repair, and software-engineering tasks
Not enough matched evidence
Claude Opus 4.5 is scored on Estimated evidence for coding, so the reading is directional rather than like-for-like.
Confidence: limitedAgentic work
Tool use, computer use, and multi-step task completion
Not enough matched evidence
Claude Opus 4.5 is scored on Estimated evidence for agentic, so the reading is directional rather than like-for-like.
Confidence: limitedChat 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-ratesCache-heavy agent loop cost
200K cached + 20K fresh input + 10K output tokens
Not enough matched evidence
The page does not recommend a cost winner because at least one model cannot fit the stated workload in one request. Claude Opus 4.5 does not fit this workload in one request. Claude Opus 4.5 has no published cached-input rate, so cached tokens use its listed input rate. Nemotron 3 Ultra has no comparable published API token rate.
Confidence: rate-fallbackRepository 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
Which one for a specific job
Choose a job from the LLM Selector's task catalog to see the category row it rests on, under the same basis rules as the table below. A directional row stays directional; choosing a job never creates a winner.
The same task catalog as the LLM Selector. Each job names the evidence surface it rests on; nothing here adds a new score.
40.4Claude Opus 4.521.9Nemotron 3 Ultra
Directional only · BenchAlign v5.8
Claude Opus 4.5 has the higher coding point estimate. Conditional score ranges do not establish rank confidence.
Coding scores combine specific tasks and setups. Match the editor, harness, and effort to your workflow.
Same basis rules as the category table below
What is actually comparable
Shared results can support a head-to-head reading. Results present for only one model describe coverage, not superiority.
51 Claude Opus 4.5 only
10 Shared
14 Nemotron 3 Ultra only
3 categories rest on Estimated evidence or different evidence sets. Those rows remain visible for coverage context but do not name a winner.
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.
IFBenchInstruction following
Normalized gap 23.7Claude Opus 4.5:58%Nemotron 3 Ultra:81.7%SWE MultilingualCoding
Normalized gap 9.8Claude Opus 4.5:77.5%Nemotron 3 Ultra:67.7%SWE-bench VerifiedCoding
Normalized gap 9.0Claude Opus 4.5:80.9%Nemotron 3 Ultra:71.9%HLEKnowledge
Normalized gap 4.1Claude Opus 4.5:30.8%Nemotron 3 Ultra:26.7%MMLU-ProKnowledge
Normalized gap 2.7Claude Opus 4.5:89.5%Nemotron 3 Ultra:86.8%
Bars run 0–100 on each benchmark’s normalized display scale
Category results, on a stated basis
Each row shows the public-lane category score for both models: the BenchAlign v5.8 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.
Multilingual
Like-for-like- Claude Opus 4.5
- 96.5
- #2/17
- Nemotron 3 Ultra
- 89.2
- #7/17
- Basis
- Provisional lane · 1 vs 1 weighted rows
- Reading
- Claude Opus 4.5 leads
Instruction following
Like-for-like- Claude Opus 4.5
- 31.9
- #127/144
- Nemotron 3 Ultra
- 92.1
- #20/144
- Basis
- Provisional lane · 1 vs 1 weighted rows
- Reading
- Nemotron 3 Ultra leads
Agentic
Directional only- Claude Opus 4.5
- 32.6
- Estimated · #86/125
- Nemotron 3 Ultra
- 28.2
- Supported · #95/125
- Basis
- BenchAlign v5.8 lane · 15 vs 6 public rows
- Reading
- Directional only
Coding
Directional only- Claude Opus 4.5
- 40.4
- Estimated · #64/149
- Nemotron 3 Ultra
- 21.9
- Supported · #115/149
- Basis
- BenchAlign v5.8 lane · 6 vs 7 public rows
- Reading
- Directional only
Knowledge
Directional only- Claude Opus 4.5
- 51.0
- Estimated · #75/181
- Nemotron 3 Ultra
- 50.4
- Estimated · #77/181
- Basis
- BenchAlign v5.8 lane · 6 vs 7 public rows
- Reading
- Directional only
Reasoning
Not comparable- Claude Opus 4.5
- 78.3
- Unranked · 4 rankable rows
- Nemotron 3 Ultra
- 70.8
- #20/29
- Basis
- Provisional lane · 1 vs 1 weighted rows
- Reading
- Not comparable
Multimodal
Not comparable- Claude Opus 4.5
- 48.6
- #49/54
- Nemotron 3 Ultra
- Not ranked
- Basis
- Provisional lane · 2 vs 0 weighted rows
- Reading
- Not comparable
Math
Not comparable- Claude Opus 4.5
- 61.3
- #9/12
- Nemotron 3 Ultra
- Not ranked
- Basis
- Provisional lane · 4 vs 0 weighted rows
- Reading
- Not comparable
| Category | Claude Opus 4.5 | Nemotron 3 Ultra | Basis | Reading |
|---|---|---|---|---|
| Multilingual | 96.5#2/17 | 89.2#7/17 | Like-for-likeProvisional lane · 1 vs 1 weighted rows | Claude Opus 4.5 leads |
| Instruction following | 31.9#127/144 | 92.1#20/144 | Like-for-likeProvisional lane · 1 vs 1 weighted rows | Nemotron 3 Ultra leads |
| Agentic | 32.6Estimated · #86/125 | 28.2Supported · #95/125 | Directional onlyBenchAlign v5.8 lane · 15 vs 6 public rows | Directional only |
| Coding | 40.4Estimated · #64/149 | 21.9Supported · #115/149 | Directional onlyBenchAlign v5.8 lane · 6 vs 7 public rows | Directional only |
| Knowledge | 51.0Estimated · #75/181 | 50.4Estimated · #77/181 | Directional onlyBenchAlign v5.8 lane · 6 vs 7 public rows | Directional only |
| Reasoning | 78.3Unranked · 4 rankable rows | 70.8#20/29 | Not comparableProvisional lane · 1 vs 1 weighted rows | Not comparable |
| Multimodal | 48.6#49/54 | Not ranked | Not comparableProvisional lane · 2 vs 0 weighted rows | Not comparable |
| Math | 61.3#9/12 | Not ranked | Not comparableProvisional lane · 4 vs 0 weighted rows | Not comparable |
Ranks count the models scored in each category’s lane, so the agentic, coding, and knowledge denominators (BenchAlign v5.8) differ from the provisional-lane categories. Unranked scores sit on the provisional lane’s scale but never name a winner. Like-for-like rows within 0.5 points read as a practical tie.
Supported evidence per lane · bars run 0–100Methodology
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
- Claude Opus 4.5
- $0.0175
- 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
- Claude Opus 4.5
- $0.325
- 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
- Claude Opus 4.5
- $1.35
- Does not fit in one request
- Cached input priced at the published list-input rate
- Nemotron 3 Ultra
- Self-hosted; infrastructure cost varies
- Fits in one request
- Cached-input rate unavailable
Claude Opus 4.5 does not fit this workload in one request. Claude Opus 4.5 has no published cached-input rate, so cached tokens use its listed input rate. Nemotron 3 Ultra has no comparable published API token rate.
Cached input falls back to the list input rate only where a cached rate is unpublished
Specification differences
Sourced differences are shown directly. Missing facts stay explicit instead of being inferred from a model name or family.
SpecificationClaude Opus 4.5Nemotron 3 Ultra
Context window
Maximum documented context; output-token limits may be lower.
Claude Opus 4.5
200K
Nemotron 3 Ultra
1M
API model ID
Claude Opus 4.5
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.
Claude Opus 4.5
Not published
Nemotron 3 Ultra
No comparable hosted API rate
Documented inputs
Claude Opus 4.5
Not sourced
Nemotron 3 Ultra
Not sourced
Documented outputs
Claude Opus 4.5
Not sourced
Nemotron 3 Ultra
Not sourced
Provider availability
Claude Opus 4.5
Not sourced
Nemotron 3 Ultra
Not sourced
Reasoning profile
Claude Opus 4.5
Non-Reasoning
Nemotron 3 Ultra
Reasoning
Weight access
Claude Opus 4.5
Proprietary
Nemotron 3 Ultra
Open Weight
License
Claude Opus 4.5
Proprietary
Nemotron 3 Ultra
Open Weight
Release date
Claude Opus 4.5
2025-11-24
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
- Claude Opus 4.5 has the higher public point estimate, 54.05 versus 47.25. Their conditional score ranges overlap. These ranges do not establish rank confidence.
- Workload cost
- A complete comparable API-rate estimate is not available for both models.
- Context tradeoff
- Nemotron 3 Ultra has the larger documented window (1M).
Run the same representative tasks against both endpoints before changing production traffic.
Questions
Which is better, Claude Opus 4.5 or Nemotron 3 Ultra?
Claude Opus 4.5 has the higher public point estimate, 54.05 versus 47.25. Their conditional score ranges overlap. These ranges do not establish rank confidence. The page therefore keeps the decision tied to the specific documented workload.
Which is better for coding, Claude Opus 4.5 or Nemotron 3 Ultra?
Claude Opus 4.5 scores higher for coding on the public lane, 40.4 to 21.9. Claude Opus 4.5 is scored on Estimated evidence for coding, so the reading is directional rather than like-for-like. BenchLM does not name a winner for coding from a directional reading; read the shared benchmark rows directly and test the models on the same task set.
Which is better for agentic tasks, Claude Opus 4.5 or Nemotron 3 Ultra?
Claude Opus 4.5 scores higher for agentic tasks on the public lane, 32.6 to 28.2. Claude Opus 4.5 is scored on Estimated evidence for agentic tasks, so the reading is directional rather than like-for-like. BenchLM does not name a winner for agentic tasks from a directional reading; read the shared benchmark rows directly and test the models on the same task set.
Which costs less, Claude Opus 4.5 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, Claude Opus 4.5 or Nemotron 3 Ultra?
Nemotron 3 Ultra has the larger documented context window: 1M, compared with 200K.
Benchmark evidence
The full public result ledger is available for audit without forcing a wide desktop table onto a phone.
Browse raw public benchmark evidence75 rows
Agentic
Terminal-Bench 2.0
Claude Opus 4.559.3%SourceNemotron 3 Ultra—Not directly comparable
OSWorld-Verified
Claude Opus 4.566.3%SourceNemotron 3 Ultra—Not directly comparable
OSWorld
Claude Opus 4.566.3%SourceNemotron 3 Ultra—Not directly comparable
Claw-Eval
Claude Opus 4.559.6%SourceNemotron 3 Ultra—Not directly comparable
QwenClawBench
Claude Opus 4.552.3%SourceNemotron 3 Ultra—Not directly comparable
τ³-bench results
Claude Opus 4.570.2%SourceNemotron 3 Ultra70.9%SourceNemotron 3 Ultra leads this result
VITA-Bench
Claude Opus 4.523.3%SourceNemotron 3 Ultra—Not directly comparable
DeepPlanning
Claude Opus 4.526.4%SourceNemotron 3 Ultra—Not directly comparable
Toolathlon
Claude Opus 4.543.5%SourceNemotron 3 Ultra—Not directly comparable
MCP Atlas
Claude Opus 4.542.3%SourceNemotron 3 Ultra—Not directly comparable
MCP-Tasks
Claude Opus 4.571.8%SourceNemotron 3 Ultra—Not directly comparable
WideResearch
Claude Opus 4.576.4%SourceNemotron 3 Ultra—Not directly comparable
CyberGym
Claude Opus 4.550.6%SourceNemotron 3 Ultra—Not directly comparable
Gert Labs
Claude Opus 4.564.23%SourceNemotron 3 Ultra—Not directly comparable
JobBench
Claude Opus 4.532.3%SourceNemotron 3 Ultra—Not directly comparable
Terminal-Bench 2.1
Claude Opus 4.5—Nemotron 3 Ultra56.4%SourceNot directly comparable
PinchBench
Claude Opus 4.5—Nemotron 3 Ultra90.0%SourceNot directly comparable
BrowseComp
Claude Opus 4.5—Nemotron 3 Ultra44.4%SourceNot directly comparable
HLE w/ tools
Claude Opus 4.5—Nemotron 3 Ultra37.4%SourceNot directly comparable
Terminal-Bench 2.1 (Vals)
Claude Opus 4.5—Nemotron 3 Ultra50.9%SourceNot directly comparable
Coding
SWE-bench Verified
Claude Opus 4.580.9%SourceNemotron 3 Ultra71.9%SourceClaude Opus 4.5 leads this result
LiveCodeBench v6
Claude Opus 4.584.8%SourceNemotron 3 Ultra89.0%SourceNemotron 3 Ultra leads this result
SWE-bench Pro
Claude Opus 4.557.1%SourceNemotron 3 Ultra—Not directly comparable
SWE Multilingual
Claude Opus 4.577.5%SourceNemotron 3 Ultra67.7%SourceClaude Opus 4.5 leads this result
NL2Repo
Claude Opus 4.543.2%SourceNemotron 3 Ultra—Not directly comparable
Terminal-Bench 2.0
Claude Opus 4.559.3%SourceNemotron 3 Ultra—Not directly comparable
SciCode
Claude Opus 4.5—Nemotron 3 Ultra44.6%SourceNot directly comparable
Terminal-Bench 2.1
Claude Opus 4.5—Nemotron 3 Ultra56.4%SourceNot directly comparable
LiveCodeBench (Vals)
Claude Opus 4.5—Nemotron 3 Ultra86.0%SourceNot directly comparable
SWE-bench (Vals)
Claude Opus 4.5—Nemotron 3 Ultra69.0%SourceNot directly comparable
Reasoning
Multimodal
MMMU
Claude Opus 4.580.7%SourceNemotron 3 Ultra—Not directly comparable
MMMU-Pro
Claude Opus 4.570.6%SourceNemotron 3 Ultra—Not directly comparable
RealWorldQA
Claude Opus 4.577.0%SourceNemotron 3 Ultra—Not directly comparable
OmniDocBench 1.5
Claude Opus 4.587.7%SourceNemotron 3 Ultra—Not directly comparable
Video-MME (with subtitle)
Claude Opus 4.577.6%SourceNemotron 3 Ultra—Not directly comparable
Video-MME (w/o subtitle)
Claude Opus 4.581.4%SourceNemotron 3 Ultra—Not directly comparable
MathVision
Claude Opus 4.574.3%SourceNemotron 3 Ultra—Not directly comparable
We-Math
Claude Opus 4.570.0%SourceNemotron 3 Ultra—Not directly comparable
DynaMath
Claude Opus 4.579.7%SourceNemotron 3 Ultra—Not directly comparable
SimpleVQA
Claude Opus 4.565.7%SourceNemotron 3 Ultra—Not directly comparable
CharXiv
Claude Opus 4.568.5%SourceNemotron 3 Ultra—Not directly comparable
CountBench
Claude Opus 4.590.6%SourceNemotron 3 Ultra—Not directly comparable
AI2D_TEST
Claude Opus 4.587.7%SourceNemotron 3 Ultra—Not directly comparable
ERQA
Claude Opus 4.546.8%SourceNemotron 3 Ultra—Not directly comparable
VideoMMMU
Claude Opus 4.584.4%SourceNemotron 3 Ultra—Not directly comparable
MLVU (M-Avg)
Claude Opus 4.581.7%SourceNemotron 3 Ultra—Not directly comparable
ScreenSpot Pro
Claude Opus 4.545.7%SourceNemotron 3 Ultra—Not directly comparable
V*
Claude Opus 4.567.0%SourceNemotron 3 Ultra—Not directly comparable
Knowledge
GPQA
Claude Opus 4.587%SourceNemotron 3 Ultra87%SourceTie
SuperGPQA
Claude Opus 4.570.6%SourceNemotron 3 Ultra—Not directly comparable
MMLU-Pro
Claude Opus 4.589.5%SourceNemotron 3 Ultra86.8%SourceClaude Opus 4.5 leads this result
MMLU-Redux
Claude Opus 4.596.6%SourceNemotron 3 Ultra—Not directly comparable
C-Eval
Claude Opus 4.592.2%SourceNemotron 3 Ultra—Not directly comparable
HLE
Claude Opus 4.530.8%SourceNemotron 3 Ultra26.7%SourceClaude Opus 4.5 leads this result
GPQA-D
Claude Opus 4.5—Nemotron 3 Ultra87.0%SourceNot directly comparable
HLE w/o tools
Claude Opus 4.5—Nemotron 3 Ultra26.7%SourceNot directly comparable
GPQA Diamond (Vals)
Claude Opus 4.5—Nemotron 3 Ultra86.1%SourceNot directly comparable
MMLU-Pro (Vals)
Claude Opus 4.5—Nemotron 3 Ultra85.8%SourceNot directly comparable
Multilingual
MMLU-ProX
Claude Opus 4.585.7%SourceNemotron 3 Ultra83%SourceClaude Opus 4.5 leads this result
NOVA-63
Claude Opus 4.556.7%SourceNemotron 3 Ultra—Not directly comparable
INCLUDE
Claude Opus 4.586.2%SourceNemotron 3 Ultra—Not directly comparable
PolyMath
Claude Opus 4.579.0%SourceNemotron 3 Ultra—Not directly comparable
MAXIFE
Claude Opus 4.579.2%SourceNemotron 3 Ultra—Not directly comparable
Instruction following
Math
AIME26
Claude Opus 4.595.1%SourceNemotron 3 Ultra—Not directly comparable
HMMT Feb 2025
Claude Opus 4.592.9%SourceNemotron 3 Ultra—Not directly comparable
HMMT Nov 2025
Claude Opus 4.593.3%SourceNemotron 3 Ultra—Not directly comparable
HMMT Feb 2026
Claude Opus 4.585.3%SourceNemotron 3 Ultra—Not directly comparable
MMAnswerBench
Claude Opus 4.584.0%SourceNemotron 3 Ultra—Not directly comparable
FrontierMath v2 (Tiers 1-3)
Claude Opus 4.534.386%SourceNemotron 3 Ultra—Not directly comparable
FrontierMath v2 (Tier 4)
Claude Opus 4.54.878%SourceNemotron 3 Ultra—Not directly comparable
75 public results · 10 shared
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Last updated October 14, 2026