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Claude Mythos 5.2 vs Llama 3.1 8B Instruct

Claude Mythos 5.2 leads the LLM Stats Score 59.6 to -3.2. Llama 3.1 8B Instruct is 711.1x cheaper per token.

Anthropic · Meta · Updated for 2026

Which is better?

Claude Mythos 5.2 leads the overall LLM Stats Score 59.6 to -3.2, ranking #2 overall.

On price, Llama 3.1 8B Instruct is roughly 711.1x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Claude Mythos 5.2 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 5.2

  • overall performance matters — it scores 59.6 and ranks #2 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 Nov 2026

Choose Llama 3.1 8B Instruct

  • cost matters — it's about 711.1x cheaper per token
  • you need open weights you can self-host or fine-tune

At a glance

The differences that matter most.

Claude Mythos 5.2
Anthropic
Llama 3.1 8B Instruct
Meta
Core performance indexes
LLM Stats Score
59.6
#2
-3.2
#385
Reasoning
53.3
#8
-4.2
#380
Coding
45.1
#5
-2.4
#289
Cost, coverage & limits
Benchmark wins
—
—
Input price
$8.00 / M
$0.02 / M
Output price
$40.00 / M
$0.03 / M
Context window
1,000,000
131,072

Capability indexes

Additional strengths measured across groups of related public benchmarks

1 shared
Index
Claude Mythos 5.2
Llama 3.1 8B Instruct
Tool use
38.0#1
17.0#98
Conservative TrueSkill rating · higher is betterHow scores work

Individual benchmarks

9 reported for Claude Mythos 5.2 · 18 for Llama 3.1 8B Instruct

No common benchmarks found

Claude Mythos 5.2 and Llama 3.1 8B Instructdon'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

Llama 3.1 8B Instruct costs less

For input processing, Claude Mythos 5.2 ($8.00/1M tokens) is 400.0x more expensive than Llama 3.1 8B Instruct ($0.02/1M tokens).

For output processing, Claude Mythos 5.2 ($40.00/1M tokens) is 1333.3x more expensive than Llama 3.1 8B Instruct ($0.03/1M tokens).

In conclusion, Claude Mythos 5.2 is more expensive than Llama 3.1 8B Instruct.*

* Using a 3:1 ratio of input to output tokens

Lowest available price from all providers
Tue Nov 10 2026 • llm-stats.com
Anthropic
Claude Mythos 5.2
Input tokens$8.00
Output tokens$40.00
Best providerAnthropic
Meta
Llama 3.1 8B Instruct
Input tokens$0.02
Output tokens$0.03
Best providerDeepinfra
Notice missing or incorrect data?

Context Window

Maximum input and output token capacity

Claude Mythos 5.2 accepts 1,000,000 input tokens compared to Llama 3.1 8B Instruct's 131,072 tokens. Llama 3.1 8B Instruct can generate longer responses up to 131,072 tokens, while Claude Mythos 5.2 is limited to 128,000 tokens.

Anthropic
Claude Mythos 5.2
Input1,000,000 tokens
Output128,000 tokens
Meta
Llama 3.1 8B Instruct
Input131,072 tokens
Output131,072 tokens
Tue Nov 10 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Claude Mythos 5.2 supports multimodal inputs, whereas Llama 3.1 8B Instruct does not.

Claude Mythos 5.2 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Claude Mythos 5.2

Text
Images
Audio
Video

Llama 3.1 8B Instruct

Text
Images
Audio
Video

License

Usage and distribution terms

Claude Mythos 5.2 is licensed under a proprietary license, while Llama 3.1 8B Instruct uses Llama 3.1 Community License.

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

Claude Mythos 5.2

Proprietary

Closed source

Llama 3.1 8B Instruct

Llama 3.1 Community License

Open weights

Release Timeline

When each model was launched

Claude Mythos 5.2 was released on 2026-11-09, while Llama 3.1 8B Instruct was released on 2024-07-23.

Claude Mythos 5.2 is 28 months newer than Llama 3.1 8B Instruct.

Claude Mythos 5.2

Nov 9, 2026

0 days ago

2.3yr newer
Llama 3.1 8B Instruct

Jul 23, 2024

2.3 years ago

Knowledge Cutoff

When training data ends

Claude Mythos 5.2 has a knowledge cutoff of 2026-06-01, while Llama 3.1 8B Instruct has a cutoff of 2023-12-31.

Claude Mythos 5.2 has more recent training data (up to 2026-06-01), making it potentially better informed about events through that date compared to Llama 3.1 8B Instruct (2023-12-31).

Claude Mythos 5.2

Jun 2026

2.5 yr newer
Llama 3.1 8B Instruct

Dec 2023

Provider Availability

Claude Mythos 5.2 is available from Anthropic. Llama 3.1 8B Instruct is available from DeepInfra, Lambda, Groq, Sambanova, Cerebras, Hyperbolic, Together, Fireworks, Bedrock.

Claude Mythos 5.2

anthropic logo
Anthropic
Input Price:Input: $8.00/1MOutput Price:Output: $40.00/1M

Llama 3.1 8B Instruct

deepinfra logo
Deepinfra
Input Price:Input: $0.02/1MOutput Price:Output: $0.04/1M
lambda logo
Lambda
Input Price:Input: $0.03/1MOutput Price:Output: $0.03/1M
groq logo
Groq
Input Price:Input: $0.05/1MOutput Price:Output: $0.08/1M
sambanova logo
Sambanova
Input Price:Input: $0.10/1MOutput Price:Output: $0.20/1M
cerebras logo
Cerebras
Input Price:Input: $0.10/1MOutput Price:Output: $0.10/1M
hyperbolic logo
Hyperbolic
Input Price:Input: $0.10/1MOutput Price:Output: $0.10/1M
together logo
Together
Input Price:Input: $0.20/1MOutput Price:Output: $0.20/1M
fireworks logo
Fireworks
Input Price:Input: $0.20/1MOutput Price:Output: $0.20/1M
bedrock logo
AWS Bedrock
Input Price:Input: $0.22/1MOutput Price:Output: $0.22/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?

Judge for yourself.

Run your own prompts against Claude Mythos 5.2 and Llama 3.1 8B Instruct side-by-side, then vote on the output you prefer.

Claude Mythos 5.2
✓ Preferred
Llama 3.1 8B Instruct
Open in Playground

FAQ

Common questions about Claude Mythos 5.2 vs Llama 3.1 8B Instruct.

Which is better, Claude Mythos 5.2 or Llama 3.1 8B Instruct?

Claude Mythos 5.2 leads the LLM Stats Score 59.6 to -3.2. Claude Mythos 5.2 is made by Anthropic and Llama 3.1 8B Instruct is made by Meta. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Claude Mythos 5.2 compare to Llama 3.1 8B Instruct in benchmarks?

Claude Mythos 5.2 scores De novo protein binder design: 85.1%, Biomedical image analysis: 80.7%, Protocols Troubleshooting: 77.1%, Terminal-Bench-Science 0.1: 75.3%, Terminal-Bench 4.0: 70.5%. Llama 3.1 8B Instruct scores GSM-8K (CoT): 84.5%, ARC-C: 83.4%, API-Bank: 82.6%, IFEval: 80.4%, BFCL: 76.1%.

Is Claude Mythos 5.2 cheaper than Llama 3.1 8B Instruct?

Llama 3.1 8B Instruct is 400.0x cheaper for input tokens. Claude Mythos 5.2 costs $8.00/M input and $40.00/M output via anthropic. Llama 3.1 8B Instruct costs $0.02/M input and $0.03/M output via deepinfra.

What are the context window sizes for Claude Mythos 5.2 and Llama 3.1 8B Instruct?

Claude Mythos 5.2 supports 1.0M tokens and Llama 3.1 8B Instruct supports 131K 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 5.2 and Llama 3.1 8B Instruct?

Key differences include LLM Stats Score (59.6 vs -3.2), context window (1.0M vs 131K), input pricing ($8.00 vs $0.02/M), multimodal support (yes vs no), licensing (Proprietary vs Llama 3.1 Community License). See the full comparison above for benchmark-by-benchmark results.

Who makes Claude Mythos 5.2 and Llama 3.1 8B Instruct?

Claude Mythos 5.2 is developed by Anthropic and Llama 3.1 8B Instruct is developed by Meta.

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