Grok 4.6 vs Llama 3.1 8B Instruct
Comparing Grok 4.6 and Llama 3.1 8B Instruct across benchmarks, pricing, and capabilities.
xAI · Meta · Updated for 2026
Which is better?
Grok 4.6 and Llama 3.1 8B Instruct trade strengths across price, capabilities, and technical limits. The better choice depends on the workload.
On price, Llama 3.1 8B Instruct is roughly 100.0x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.
Grok 4.6 also accepts a larger context window (500,000 input tokens), making it the stronger choice for long documents and large codebases.
Based on current benchmark, pricing, and model metadata for 2026.
Choose Grok 4.6
- you process long inputs — it offers a 500,000 token context window
- you want the most recent training data — it shipped Aug 2026
Choose Llama 3.1 8B Instruct
- cost matters — it's about 100.0x cheaper per token
- you need open weights you can self-host or fine-tune
At a glance
The differences that matter most.
Performance Benchmarks
Comparative analysis across standard metrics
Grok 4.6 and Llama 3.1 8B Instructdon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.
Arena Performance
Playground indexes and blind preference scores
Pricing Analysis
Price comparison per million tokens
For input processing, Grok 4.6 ($2.00/1M tokens) is 66.7x more expensive than Llama 3.1 8B Instruct ($0.03/1M tokens).
For output processing, Grok 4.6 ($6.00/1M tokens) is 200.0x more expensive than Llama 3.1 8B Instruct ($0.03/1M tokens).
In conclusion, Grok 4.6 is more expensive than Llama 3.1 8B Instruct.*
* Using a 3:1 ratio of input to output tokens
Context Window
Maximum input and output token capacity
Grok 4.6 accepts 500,000 input tokens compared to Llama 3.1 8B Instruct's 131,072 tokens. Only Llama 3.1 8B Instruct specifies output context (131,072 tokens).
Input Capabilities
Supported data types and modalities
Grok 4.6 supports multimodal inputs, whereas Llama 3.1 8B Instruct does not.
Grok 4.6 can handle both text and other forms of data like images, making it suitable for multimodal applications.
Grok 4.6
Llama 3.1 8B Instruct
License
Usage and distribution terms
Grok 4.6 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.
Proprietary
Closed source
Llama 3.1 Community License
Open weights
Release Timeline
When each model was launched
Grok 4.6 was released on 2026-08-12, while Llama 3.1 8B Instruct was released on 2024-07-23.
Grok 4.6 is 25 months newer than Llama 3.1 8B Instruct.
Aug 12, 2026
1 weeks ago
2.1yr newerJul 23, 2024
2.1 years ago
Knowledge Cutoff
When training data ends
Grok 4.6 has a knowledge cutoff of 2026-02-01, while Llama 3.1 8B Instruct has a cutoff of 2023-12-31.
Grok 4.6 has more recent training data (up to 2026-02-01), making it potentially better informed about events through that date compared to Llama 3.1 8B Instruct (2023-12-31).
Feb 2026
2.2 yr newerDec 2023
Provider Availability
Grok 4.6 is available from xAI. Llama 3.1 8B Instruct is available from Lambda, DeepInfra, Groq, Sambanova, Cerebras, Hyperbolic, Together, Fireworks, Bedrock.
Grok 4.6
Llama 3.1 8B Instruct
Outputs Comparison
Judge for yourself.
Run your own prompts against Grok 4.6 and Llama 3.1 8B Instruct side-by-side, then vote on the output you prefer.
FAQ
Common questions about Grok 4.6 vs Llama 3.1 8B Instruct.