Claude Mythos 5.1 vs Llama 4 Scout
Claude Mythos 5.1 leads the LLM Stats Score 45.1 to 7.9. Llama 4 Scout is 148.1x cheaper per token.
Anthropic · Meta · Updated for 2026
Which is better?
Claude Mythos 5.1 leads the overall LLM Stats Score 45.1 to 7.9, ranking #31 overall.
On price, Llama 4 Scout is roughly 148.1x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Llama 4 Scout also accepts a larger context window (10,000,000 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 45.1 and ranks #31 on LLM Stats
- your work emphasizes reasoning and coding — it leads those capability indexes
- you want the most recent training data — it shipped Sep 2026
Choose Llama 4 Scout
- cost matters — it's about 148.1x cheaper per token
- you process long inputs — it offers a 10,000,000 token context window
- 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 · 12 for Llama 4 Scout
Claude Mythos 5.1 and Llama 4 Scoutdon'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 125.0x more expensive than Llama 4 Scout ($0.08/1M tokens).
For output processing, Claude Mythos 5.1 ($50.00/1M tokens) is 166.7x more expensive than Llama 4 Scout ($0.30/1M tokens).
In conclusion, Claude Mythos 5.1 is more expensive than Llama 4 Scout.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Llama 4 Scout accepts 10,000,000 input tokens compared to Claude Mythos 5.1's 1,000,000 tokens. Llama 4 Scout can generate longer responses up to 10,000,000 tokens, while Claude Mythos 5.1 is limited to 128,000 tokens.
Input capabilities
Documented input modalities across available providers
Both Claude Mythos 5.1 and Llama 4 Scout support multimodal inputs.
They are both capable of processing various types of data, offering versatility in application.
Claude Mythos 5.1
Llama 4 Scout
License
Usage and distribution terms
Claude Mythos 5.1 is licensed under a proprietary license, while Llama 4 Scout uses Llama 4 Community License Agreement.
License differences may affect how you can use these models in commercial or open-source projects.
Proprietary
Closed source
Llama 4 Community License Agreement
Open weights
Release Timeline
When each model was launched
Claude Mythos 5.1 was released on 2026-09-01, while Llama 4 Scout was released on 2025-04-05.
Claude Mythos 5.1 is 17 months newer than Llama 4 Scout.
Sep 1, 2026
1 weeks ago
1.4yr newerApr 5, 2025
1.4 years ago
Knowledge Cutoff
When training data ends
Neither model specifies a knowledge cutoff date.
Unable to compare the recency of their training data.
Provider Availability
Claude Mythos 5.1 is available from Anthropic. Llama 4 Scout is available from DeepInfra, Lambda, Novita, Groq, Fireworks, Together.
Claude Mythos 5.1
Llama 4 Scout
Outputs Comparison
Judge for yourself.
Run your own prompts against Claude Mythos 5.1 and Llama 4 Scout side-by-side, then vote on the output you prefer.
FAQ
Common questions about Claude Mythos 5.1 vs Llama 4 Scout.