Skip to main content
BenchLM
Advertise

Model comparison

Claude Mythos 5 vs Nemotron 3 Ultra

Data verified

Head-to-head evidence from 7 shared benchmark results across 3 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.

83.93/100
No comparison
N/A
3 category wins0 category wins

Public leaderboard positions: Claude Mythos 5 #1 (Supported); Nemotron 3 Ultra unranked (Not scored). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. Claude Mythos 5 and Nemotron 3 Ultra share 7 comparable benchmark results. 3 of 8 categories are comparable. 8 results are unique to Claude Mythos 5; 31 to Nemotron 3 Ultra.

Updated July 23, 2026
Shared results
7
Claude Mythos 5 only
8
Nemotron 3 Ultra only
31
Comparable categories
3 / 8

Treat this as a split decision. Claude Mythos 5 makes more sense if agentic is the priority or you need the larger 1M+ context window; Nemotron 3 Ultra is the better fit if you want the cheaper token bill.

Confidence note. This is a partial-evidence comparison with 7 shared benchmark results across 3 evidence categories; 3 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.

Why this result

Claude Mythos 5 and Nemotron 3 Ultra finish on the same BenchAlign overall score, so this is less about a single winner and more about where the edge shows up. The BenchAlign headline says tie; the benchmark table is where the real choice happens.

Claude Mythos 5 is also the more expensive model on tokens at $10.00 input / $50.00 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. Claude Mythos 5 gives you the larger context window at 1M+, compared with 1M for Nemotron 3 Ultra.

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 scores and score margins for Claude Mythos 5 and Nemotron 3 Ultra
CategoryClaude Mythos 5ΔNemotron 3 Ultra
AgenticClaude Mythos 587.0Margin← 35.7Nemotron 3 Ultra51.3
CodingClaude Mythos 589.7Margin← 31.4Nemotron 3 Ultra58.3
KnowledgeClaude Mythos 568.5Margin← 14.7Nemotron 3 Ultra53.8
ReasoningClaude Mythos 5Not measuredMarginNo overlapNemotron 3 Ultra61.9
MathClaude Mythos 597.6MarginNo overlapNemotron 3 UltraNot measured
MultilingualClaude Mythos 5Not measuredMarginNo overlapNemotron 3 Ultra83.0
MultimodalClaude Mythos 593.5MarginNo overlapNemotron 3 UltraNot measured
Inst. FollowingClaude Mythos 5Not measuredMarginNo overlapNemotron 3 Ultra81.7

Decisive benchmark drivers

The largest measured benchmark gaps in this matchup, with exact reported values.

More
A · Claude Mythos 5B · Nemotron 3 Ultra

  1. BrowseComp

    Agentic
    Source ↗
    A 88%B 44.4%
    Winner: Claude Mythos 5Δ 43.6
    BrowseComp: Claude Mythos 5 scored 88%; Nemotron 3 Ultra scored 44.4%. Claude Mythos 5 wins this benchmark.

  2. HLE

    Knowledge
    Source ↗
    A 64.5%B 26.7%
    Winner: Claude Mythos 5Δ 37.8
    HLE: Claude Mythos 5 scored 64.5%; Nemotron 3 Ultra scored 26.7%. Claude Mythos 5 wins this benchmark.

  3. Terminal-Bench 2.0

    Agentic
    Source ↗
    A 88%B 56.4%
    Winner: Claude Mythos 5Δ 31.6
    Terminal-Bench 2.0: Claude Mythos 5 scored 88%; Nemotron 3 Ultra scored 56.4%. Claude Mythos 5 wins this benchmark.

  4. SWE-bench Verified

    Coding
    Source ↗
    A 95.5%B 71.9%
    Winner: Claude Mythos 5Δ 23.6
    SWE-bench Verified: Claude Mythos 5 scored 95.5%; Nemotron 3 Ultra scored 71.9%. Claude Mythos 5 wins this benchmark.

  5. GPQA

    Knowledge
    Source ↗
    A 94.1%B 87%
    Winner: Claude Mythos 5Δ 7.1
    GPQA: Claude Mythos 5 scored 94.1%; Nemotron 3 Ultra scored 87%. Claude Mythos 5 wins this benchmark.

Operational comparison

Runtime and commercial metrics are compared only when both models have a complete sourced value.

MetricClaude Mythos 5Nemotron 3 UltraComparison
Input / output priceUSD per 1M tokensClaude Mythos 5$10 input / $50 outputNemotron 3 Ultra$0 input / $0 outputNemotron 3 Ultra has the lower combined listed price.
Generation speedtokens per secondClaude Mythos 5Not availableNemotron 3 UltraNot availableA complete speed comparison is not available.
First-answer latencyseconds to first tokenClaude Mythos 5Not availableNemotron 3 UltraNot availableA complete latency comparison is not available.
Context windowmaximum listed tokensClaude Mythos 51M+Nemotron 3 Ultra1MClaude Mythos 5 lists the larger context window.

Benchmark Deep Dive

AgenticClaude Mythos 5 wins
BenchmarkClaude Mythos 5Nemotron 3 UltraResult
Terminal-Bench 2.0Source 88%56.4%Claude Mythos 5 leads
OSWorld-VerifiedSource 85%—Not comparable
BrowseCompSource 88%44.4%Claude Mythos 5 leads
ExploitGymSource 17.5%—Not comparable
PinchBenchSource —90.0%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
τ²-bench resultsSource —83.3%Not comparable
GDPval-AASource —1164Not comparable
AA BriefcaseSource —870Not comparable
AA EnterpriseOps-GymSource —28.9%Not comparable
AA Harvey LABSource —81.7%Not comparable
terminalBenchHardSource —36.4%Not comparable
CodingClaude Mythos 5 wins
BenchmarkClaude Mythos 5Nemotron 3 UltraResult
SWE-bench VerifiedSource 95.5%71.9%Claude Mythos 5 leads
SWE-bench ProSource 80.3%—Not comparable
Terminal-Bench 2.0Source 88.0%56.4%Claude Mythos 5 leads
SWE MultilingualSource —67.7%Not comparable
SciCodeSource —44.6%Not comparable
AA Coding IndexSource —49.3%Not comparable
AA-SciCodeSource —39.9%Not comparable
Reasoning
BenchmarkClaude Mythos 5Nemotron 3 UltraResult
AA-LCRSource —67.0%Not comparable
CritPtSource —3.1%Not comparable
LongBench v2Source —61.9%Not comparable
KnowledgeClaude Mythos 5 wins
BenchmarkClaude Mythos 5Nemotron 3 UltraResult
GPQASource 94.1%87%Claude Mythos 5 leads
HLESource 64.5%26.7%Claude Mythos 5 leads
HLE w/o toolsSource 59%26.7%Claude Mythos 5 leads
GPQA-DSource —87.0%Not comparable
MMLU-ProSource —86.8%Not comparable
AA-Omniscience AccuracySource —21.6%Not comparable
Artificial Analysis Intelligence IndexSource —37.8%Not comparable
AA-GPQA DiamondSource —86.7%Not comparable
AA-HLESource —26.6%Not comparable
AA-Omniscience IndexSource —-0.8%Not comparable
AA-Omniscience Hallucination RateSource —28.5%Not comparable
AA Openness IndexSource —83.3%Not comparable
Math
BenchmarkClaude Mythos 5Nemotron 3 UltraResult
USAMO 2026Source 97.6%—Not comparable
Multilingual
BenchmarkClaude Mythos 5Nemotron 3 UltraResult
SWE MultilingualSource 92.2%—Not comparable
MMLU-ProXSource —83%Not comparable
Multimodal
BenchmarkClaude Mythos 5Nemotron 3 UltraResult
SWE-bench MultimodalSource 54.9%—Not comparable
CharXivSource 93.5%—Not comparable
CharXiv w/o toolsSource 88.9%—Not comparable
Design Arena WebsiteSource —1129Not comparable
Inst. Following
BenchmarkClaude Mythos 5Nemotron 3 UltraResult
IFBenchSource —81.7%Not comparable
AA-IFBenchSource —81.4%Not comparable
Frequently Asked Questions (4)

Which is better, Claude Mythos 5 or Nemotron 3 Ultra?

Claude Mythos 5 and Nemotron 3 Ultra are tied on the BenchAlign overall score, so the right pick depends on which category matters most for your use case.

Which is better for knowledge tasks, Claude Mythos 5 or Nemotron 3 Ultra?

Claude Mythos 5 has the edge for knowledge tasks in this comparison, averaging 68.5 versus 53.8. Inside this category, HLE is the benchmark that creates the most daylight between them.

Which is better for coding, Claude Mythos 5 or Nemotron 3 Ultra?

Claude Mythos 5 has the edge for coding in this comparison, averaging 89.7 versus 58.3. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.

Which is better for agentic tasks, Claude Mythos 5 or Nemotron 3 Ultra?

Claude Mythos 5 has the edge for agentic tasks in this comparison, averaging 87 versus 51.3. Inside this category, BrowseComp is the benchmark that creates the most daylight between them.

Related Comparisons

Explore More

Anthropic Compare Pricing Methodology Find Your Best LLM Overall Rankings
Last updated: July 23, 2026

Choose a model with this week’s evidence

Join 2,000+ readers for ranking moves, pricing changes, and the claims that still need proof.

One email each week. Unsubscribe anytime.