Claude Mythos 5.1 vs Nemotron 3 Nano (30B A3B)
Claude Mythos 5.1 leads the LLM Stats Score 44.5 to 21.0. Nemotron 3 Nano (30B A3B) is 228.6x cheaper per token.
Anthropic · NVIDIA · Updated for 2026
Which is better?
Claude Mythos 5.1 leads the overall LLM Stats Score 44.5 to 21.0, ranking #40 overall.
On price, Nemotron 3 Nano (30B A3B) is roughly 228.6x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Claude Mythos 5.1 also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current LLM Stats indexes, shared benchmarks, pricing, and model metadata for 2026.
Choose Claude Mythos 5.1
- overall performance matters — it scores 44.5 and ranks #40 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you process long inputs — it offers a 1,000,000 token context window
- you want the most recent training data — it shipped Sep 2026
Choose Nemotron 3 Nano (30B A3B)
- cost matters — it's about 228.6x cheaper per token
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Individual benchmarks
1 reported for Claude Mythos 5.1 · 15 for Nemotron 3 Nano (30B A3B)
Claude Mythos 5.1 and Nemotron 3 Nano (30B A3B)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
Pricing Analysis
Price comparison per million tokens
For input processing, Claude Mythos 5.1 ($10.00/1M tokens) is 200.0x more expensive than Nemotron 3 Nano (30B A3B) ($0.05/1M tokens).
For output processing, Claude Mythos 5.1 ($50.00/1M tokens) is 250.0x more expensive than Nemotron 3 Nano (30B A3B) ($0.20/1M tokens).
In conclusion, Claude Mythos 5.1 is more expensive than Nemotron 3 Nano (30B A3B).*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Claude Mythos 5.1 accepts 1,000,000 input tokens compared to Nemotron 3 Nano (30B A3B)'s 262,144 tokens. Nemotron 3 Nano (30B A3B) can generate longer responses up to 262,144 tokens, while Claude Mythos 5.1 is limited to 128,000 tokens.
Input capabilities
Documented input modalities across available providers
Claude Mythos 5.1 supports multimodal inputs, whereas Nemotron 3 Nano (30B A3B) does not.
Claude Mythos 5.1 can handle both text and other forms of data like images, making it suitable for multimodal applications.
Claude Mythos 5.1
Nemotron 3 Nano (30B A3B)
License
Usage and distribution terms
Claude Mythos 5.1 is licensed under a proprietary license, while Nemotron 3 Nano (30B A3B) uses NVIDIA Open Model License Agreement .
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
NVIDIA Open Model License Agreement
Open weights
Release Timeline
When each model was launched
Claude Mythos 5.1 was released on 2026-09-01, while Nemotron 3 Nano (30B A3B) was released on 2025-12-15.
Claude Mythos 5.1 is 9 months newer than Nemotron 3 Nano (30B A3B).
Sep 1, 2026
3 weeks ago
8mo newerDec 15, 2025
9 months ago
Knowledge Cutoff
When training data ends
Nemotron 3 Nano (30B A3B) has a documented knowledge cutoff of 2025-11-28, while Claude Mythos 5.1's cutoff date is not specified.
We can confirm Nemotron 3 Nano (30B A3B)'s training data extends to 2025-11-28, but cannot make a direct comparison without Claude Mythos 5.1's cutoff date.
—
Nov 2025
Provider Availability
Claude Mythos 5.1 is available from Anthropic. Nemotron 3 Nano (30B A3B) is available from DeepInfra.
Claude Mythos 5.1
Nemotron 3 Nano (30B A3B)
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Mythos 5.1 and Nemotron 3 Nano (30B A3B) side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Mythos 5.1 vs Nemotron 3 Nano (30B A3B).