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Model comparison

Claude Mythos 5 vs Nemotron 3.5 Lightning 30B A3B NVFP4

Updated August 11, 2026. Public scores include evidence status and uncertainty. They are not guarantees for a specific workload.

Claude Mythos 5

Anthropic

83.1/100

Supported · Public rank #1

90% interval 79.2–87.0

Nemotron 3.5 Lightning 30B A3B NVFP4

NVIDIA

26.9/100

Estimated · Public rank #204

90% interval 17.1–36.8

Claude Mythos 5 has the higher public score, 83.12 versus 26.93, and the 90% score intervals do not overlap.

6 results are shared. Category rows based on different benchmark sets are marked directional and do not name a winner.

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.

No workload recommendation clears the current evidence threshold.

Use the matched evidence, workload costs, and sourced specifications below instead of treating a point score as a universal answer.

Show secondary and unsupported calls

  • Coding work

    Code generation, repair, and software-engineering tasks

    Not enough matched evidence

    The category averages use different weighted benchmark sets, so they are directional rather than like-for-like.

    Confidence: limited

  • Agentic work

    Tool use, computer use, and multi-step task completion

    Not enough matched evidence

    The category averages use different weighted benchmark sets, so they are directional rather than like-for-like.

    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.

Shared results
6
Claude Mythos 5 only
9
Nemotron 3.5 Lightning 30B A3B NVFP4 only
7
Like-for-like categories
0 / 8

3 categories use different evidence sets. Those rows remain visible for coverage context but do not name a winner.

Category results, on a stated basis

Each row states whether both averages use the same weighted benchmark set. Directional and not-comparable rows remain visible, but they never receive a winner in this template.

Agentic

Directional only
Claude Mythos 5
87.0
Nemotron 3.5 Lightning 30B A3B NVFP4
29.1
Weighted basis
3 vs 2 rows
Reading
Directional only

Coding

Directional only
Claude Mythos 5
89.7
Nemotron 3.5 Lightning 30B A3B NVFP4
42.1
Weighted basis
2 vs 2 rows
Reading
Directional only

Knowledge

Directional only
Claude Mythos 5
68.5
Nemotron 3.5 Lightning 30B A3B NVFP4
80.5
Weighted basis
2 vs 2 rows
Reading
Directional only

Reasoning

Not comparable
Claude Mythos 5
Not measured
Nemotron 3.5 Lightning 30B A3B NVFP4
Not measured
Weighted basis
0 vs 0 rows
Reading
Not comparable

Math

Not comparable
Claude Mythos 5
97.6
Nemotron 3.5 Lightning 30B A3B NVFP4
Not measured
Weighted basis
1 vs 0 rows
Reading
Not comparable

Multilingual

Not comparable
Claude Mythos 5
Not measured
Nemotron 3.5 Lightning 30B A3B NVFP4
Not measured
Weighted basis
0 vs 0 rows
Reading
Not comparable

Multimodal

Not comparable
Claude Mythos 5
93.5
Nemotron 3.5 Lightning 30B A3B NVFP4
Not measured
Weighted basis
1 vs 0 rows
Reading
Not comparable

Instruction following

Not comparable
Claude Mythos 5
Not measured
Nemotron 3.5 Lightning 30B A3B NVFP4
72.9
Weighted basis
0 vs 1 rows
Reading
Not comparable

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.

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 Mythos 5
$0.035
Fits in one request
Nemotron 3.5 Lightning 30B A3B NVFP4
Self-hosted; infrastructure cost varies
Fits in one request

Nemotron 3.5 Lightning 30B A3B NVFP4 has no comparable published API token rate.

Repository review

50K fresh input + 3K output tokens

Claude Mythos 5
$0.65
Fits in one request
Nemotron 3.5 Lightning 30B A3B NVFP4
Self-hosted; infrastructure cost varies
Fits in one request

Nemotron 3.5 Lightning 30B A3B NVFP4 has no comparable published API token rate.

Cache-heavy agent loop

200K cached + 20K fresh input + 10K output tokens

Claude Mythos 5
$0.9
Fits in one request
Nemotron 3.5 Lightning 30B A3B NVFP4
Self-hosted; infrastructure cost varies
Fits in one request
Cached-input rate unavailable

Nemotron 3.5 Lightning 30B A3B NVFP4 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.

Provider availability

Claude Mythos 5

Limited Access · Claude API

Anthropic model overview

Nemotron 3.5 Lightning 30B A3B NVFP4

Not sourced

Reasoning profile

Claude Mythos 5

Reasoning

Nemotron 3.5 Lightning 30B A3B NVFP4

Reasoning

Weight access

Claude Mythos 5

Proprietary

Nemotron 3.5 Lightning 30B A3B NVFP4

Open Weight

License

Claude Mythos 5

Proprietary

Nemotron 3.5 Lightning 30B A3B NVFP4

Open Weight

Release date

Claude Mythos 5

2026-06-09

Nemotron 3.5 Lightning 30B A3B NVFP4

2026-08-11

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 Mythos 5 has the higher public score, 83.12 versus 26.93, 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 evidence22 rows

Agentic

  • Terminal-Bench 2.0

    Claude Mythos 588%
    Source
    Nemotron 3.5 Lightning 30B A3B NVFP423.5%
    Source

    Claude Mythos 5 leads this result

  • OSWorld-Verified

    Claude Mythos 585%
    Source
    Nemotron 3.5 Lightning 30B A3B NVFP4—

    Not directly comparable

  • BrowseComp

    Claude Mythos 588%
    Source
    Nemotron 3.5 Lightning 30B A3B NVFP436.8%
    Source

    Claude Mythos 5 leads this result

  • ExploitGym

    Claude Mythos 517.5%
    Source
    Nemotron 3.5 Lightning 30B A3B NVFP4—

    Not directly comparable

  • PinchBench

    Claude Mythos 5—
    Nemotron 3.5 Lightning 30B A3B NVFP483.4%
    Source

    Not directly comparable

  • τ³-bench results

    Claude Mythos 5—
    Nemotron 3.5 Lightning 30B A3B NVFP49.5%
    Source

    Not directly comparable

Coding

  • SWE-bench Verified

    Claude Mythos 595.5%
    Source
    Nemotron 3.5 Lightning 30B A3B NVFP452.8%
    Source

    Claude Mythos 5 leads this result

  • SWE-bench Pro

    Claude Mythos 580.3%
    Source
    Nemotron 3.5 Lightning 30B A3B NVFP4—

    Not directly comparable

  • Terminal-Bench 2.0

    Claude Mythos 588.0%
    Source
    Nemotron 3.5 Lightning 30B A3B NVFP423.5%
    Source

    Claude Mythos 5 leads this result

  • SWE Multilingual

    Claude Mythos 5—
    Nemotron 3.5 Lightning 30B A3B NVFP436.5%
    Source

    Not directly comparable

  • SciCode

    Claude Mythos 5—
    Nemotron 3.5 Lightning 30B A3B NVFP431.4%
    Source

    Not directly comparable

Knowledge

  • GPQA

    Claude Mythos 594.1%
    Source
    Nemotron 3.5 Lightning 30B A3B NVFP475.6%
    Source

    Claude Mythos 5 leads this result

  • HLE

    Claude Mythos 564.5%
    Source
    Nemotron 3.5 Lightning 30B A3B NVFP4—

    Not directly comparable

  • HLE w/o tools

    Claude Mythos 559%
    Source
    Nemotron 3.5 Lightning 30B A3B NVFP410.5%
    Source

    Claude Mythos 5 leads this result

  • GPQA-D

    Claude Mythos 5—
    Nemotron 3.5 Lightning 30B A3B NVFP475.6%
    Source

    Not directly comparable

  • MMLU-Pro

    Claude Mythos 5—
    Nemotron 3.5 Lightning 30B A3B NVFP481.6%
    Source

    Not directly comparable

Math

  • USAMO 2026

    Claude Mythos 597.6%
    Source
    Nemotron 3.5 Lightning 30B A3B NVFP4—

    Not directly comparable

Multilingual

  • SWE Multilingual

    Claude Mythos 592.2%
    Source
    Nemotron 3.5 Lightning 30B A3B NVFP4—

    Not directly comparable

Multimodal

  • SWE-bench Multimodal

    Claude Mythos 554.9%
    Source
    Nemotron 3.5 Lightning 30B A3B NVFP4—

    Not directly comparable

  • CharXiv

    Claude Mythos 593.5%
    Source
    Nemotron 3.5 Lightning 30B A3B NVFP4—

    Not directly comparable

  • CharXiv w/o tools

    Claude Mythos 588.9%
    Source
    Nemotron 3.5 Lightning 30B A3B NVFP4—

    Not directly comparable

Instruction following

  • IFBench

    Claude Mythos 5—
    Nemotron 3.5 Lightning 30B A3B NVFP472.9%
    Source

    Not directly comparable

Frequently asked questions

Which is better, Claude Mythos 5 or Nemotron 3.5 Lightning 30B A3B NVFP4?

Claude Mythos 5 has the higher public score, 83.12 versus 26.93, 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, Claude Mythos 5 or Nemotron 3.5 Lightning 30B A3B NVFP4?

The current coding averages use different weighted benchmark sets, so BenchLM does not name a winner from them. Read the shared benchmark rows directly and test the models on the same task set.

Which is better for agentic tasks, Claude Mythos 5 or Nemotron 3.5 Lightning 30B A3B NVFP4?

The current agentic tasks averages use different weighted benchmark sets, so BenchLM does not name a winner from them. Read the shared benchmark rows directly and test the models on the same task set.

Which costs less, Claude Mythos 5 or Nemotron 3.5 Lightning 30B A3B NVFP4?

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 Mythos 5 or Nemotron 3.5 Lightning 30B A3B NVFP4?

Both models list the same context window, 1M.

Related comparisons

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Last updated August 11, 2026

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