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Claude Mythos 5.1 vs Nemotron 3.5 Bolt (74B A9B 24GB)

Claude Mythos 5.1 leads the LLM Stats Score 44.3 to 29.6.

Anthropic · NVIDIA · Updated for 2026

Which is better?

Claude Mythos 5.1 leads the overall LLM Stats Score 44.3 to 29.6, ranking #50 overall.

Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.

Choose Claude Mythos 5.1

  • overall performance matters — it scores 44.3 and ranks #50 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes

Choose Nemotron 3.5 Bolt (74B A9B 24GB)

  • you want the most recent training data — it shipped Oct 2026
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Claude Mythos 5.1
Anthropic
Nemotron 3.5 Bolt (74B A9B 24GB)
NVIDIA
Core performance indexes
LLM Stats Score
44.3
#50
29.6
#146
Reasoning
43.3
#51
28.9
#146
Coding
36.1
#27
14.4
#154
Agents
34.1
#28
11.9
#127
Cost, coverage & limits
Benchmark wins
—
—
Input price
$10.00 / M
— / M
Output price
$50.00 / M
— / M
Context window
1,000,000
—

Individual benchmarks

1 reported for Claude Mythos 5.1 · 10 for Nemotron 3.5 Bolt (74B A9B 24GB)

No common benchmarks found

Claude Mythos 5.1 and Nemotron 3.5 Bolt (74B A9B 24GB)don't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Human preference

Blind head-to-head votes and playground preference scores

Context Window

Maximum input and output token capacity

Only Claude Mythos 5.1 specifies input context (1,000,000 tokens). Only Claude Mythos 5.1 specifies output context (128,000 tokens).

Anthropic
Claude Mythos 5.1
Input1,000,000 tokens
Output128,000 tokens
NVIDIA
Nemotron 3.5 Bolt (74B A9B 24GB)
Input- tokens
Output- tokens
Thu Oct 22 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Claude Mythos 5.1 and Nemotron 3.5 Bolt (74B A9B 24GB) support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Claude Mythos 5.1

Text
Images
Audio
Video

Nemotron 3.5 Bolt (74B A9B 24GB)

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Mythos 5.1 is licensed under a proprietary license, while Nemotron 3.5 Bolt (74B A9B 24GB) uses OpenMDW License v1.1.

License differences may affect how you can use these models in commercial or open-source projects.

Claude Mythos 5.1

Proprietary

Closed source

Nemotron 3.5 Bolt (74B A9B 24GB)

OpenMDW License v1.1

Open weights

Release Timeline

When each model was launched

Claude Mythos 5.1 was released on 2026-09-01, while Nemotron 3.5 Bolt (74B A9B 24GB) was released on 2026-10-15.

Nemotron 3.5 Bolt (74B A9B 24GB) is 1 month newer than Claude Mythos 5.1.

Claude Mythos 5.1

Sep 1, 2026

1 months ago

Nemotron 3.5 Bolt (74B A9B 24GB)

Oct 15, 2026

4 days ago

1mo newer

Knowledge Cutoff

When training data ends

Nemotron 3.5 Bolt (74B A9B 24GB) has a documented knowledge cutoff of 2026-05-01, while Claude Mythos 5.1's cutoff date is not specified.

We can confirm Nemotron 3.5 Bolt (74B A9B 24GB)'s training data extends to 2026-05-01, but cannot make a direct comparison without Claude Mythos 5.1's cutoff date.

Claude Mythos 5.1

—

Nemotron 3.5 Bolt (74B A9B 24GB)

May 2026

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Mythos 5.1 and Nemotron 3.5 Bolt (74B A9B 24GB) side-by-side, then vote on the output you prefer.

Claude Mythos 5.1
✓ Preferred
Nemotron 3.5 Bolt (74B A9B 24GB)
Open in Playground

FAQ

Common questions about Claude Mythos 5.1 vs Nemotron 3.5 Bolt (74B A9B 24GB).

Which is better, Claude Mythos 5.1 or Nemotron 3.5 Bolt (74B A9B 24GB)?

Claude Mythos 5.1 leads the LLM Stats Score 44.3 to 29.6. Claude Mythos 5.1 is made by Anthropic and Nemotron 3.5 Bolt (74B A9B 24GB) is made by NVIDIA. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Mythos 5.1 compare to Nemotron 3.5 Bolt (74B A9B 24GB) in benchmarks?

Claude Mythos 5.1 scores Terminal-Bench 4.0: 60.9%. Nemotron 3.5 Bolt (74B A9B 24GB) scores PinchBench: 87.8%, GPQA: 86.4%, BrowseComp: 66.8%, AA-LCR: 64.1%, MCP Atlas: 52.2%.

What are the context window sizes for Claude Mythos 5.1 and Nemotron 3.5 Bolt (74B A9B 24GB)?

Claude Mythos 5.1 supports 1.0M tokens and Nemotron 3.5 Bolt (74B A9B 24GB) supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Claude Mythos 5.1 and Nemotron 3.5 Bolt (74B A9B 24GB)?

Key differences include LLM Stats Score (44.3 vs 29.6), licensing (Proprietary vs OpenMDW License v1.1). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Mythos 5.1 and Nemotron 3.5 Bolt (74B A9B 24GB)?

Claude Mythos 5.1 is developed by Anthropic and Nemotron 3.5 Bolt (74B A9B 24GB) is developed by NVIDIA.

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