Gemini 1.5 Flash vs Llama 3.1 405B Instruct Comparison

Comparing Gemini 1.5 Flash and Llama 3.1 405B Instruct across benchmarks, pricing, and capabilities.

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Performance Benchmarks

Comparative analysis across standard metrics

6 benchmarks

Gemini 1.5 Flash outperforms in 2 benchmarks (GPQA, MATH), while Llama 3.1 405B Instruct is better at 4 benchmarks (GSM8k, HumanEval, MMLU, MMLU-Pro).

Llama 3.1 405B Instruct shows notably better performance in the majority of benchmarks.

Sun Mar 15 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 1.5 Flash costs less

For input processing, Gemini 1.5 Flash ($0.15/1M tokens) is 5.9x cheaper than Llama 3.1 405B Instruct ($0.89/1M tokens).

For output processing, Gemini 1.5 Flash ($0.60/1M tokens) is 1.5x cheaper than Llama 3.1 405B Instruct ($0.89/1M tokens).

In conclusion, Llama 3.1 405B Instruct is more expensive than Gemini 1.5 Flash.*

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

Lowest available price from all providers

Sun Mar 15 2026 • llm-stats.com

Gemini 1.5 Flash

Input tokens$0.15

Output tokens$0.60

Best providerGoogle

Llama 3.1 405B Instruct

Input tokens$0.89

Output tokens$0.89

Best providerLambda

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Context Window

Maximum input and output token capacity

Gemini 1.5 Flash accepts 1,048,576 input tokens compared to Llama 3.1 405B Instruct's 128,000 tokens. Llama 3.1 405B Instruct can generate longer responses up to 128,000 tokens, while Gemini 1.5 Flash is limited to 8,192 tokens.

Gemini 1.5 Flash

Input1,048,576 tokens

Output8,192 tokens

Llama 3.1 405B Instruct

Input128,000 tokens

Output128,000 tokens

Sun Mar 15 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Gemini 1.5 Flash supports multimodal inputs, whereas Llama 3.1 405B Instruct does not.

Gemini 1.5 Flash can handle both text and other forms of data like images, making it suitable for multimodal applications.

Gemini 1.5 Flash

Text

Images

Audio

Video

Llama 3.1 405B Instruct

Text

Images

Audio

Video

License

Usage and distribution terms

Gemini 1.5 Flash is licensed under a proprietary license, while Llama 3.1 405B Instruct uses Llama 3.1 Community License.

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

Gemini 1.5 Flash

Proprietary

Closed source

Llama 3.1 405B Instruct

Llama 3.1 Community License

Open weights

Release Timeline

When each model was launched

Gemini 1.5 Flash was released on 2024-05-01, while Llama 3.1 405B Instruct was released on 2024-07-23.

Llama 3.1 405B Instruct is 3 months newer than Gemini 1.5 Flash.

Gemini 1.5 Flash

May 1, 2024

1.9 years ago

Llama 3.1 405B Instruct

Jul 23, 2024

1.6 years ago

2mo newer

Knowledge Cutoff

When training data ends

Gemini 1.5 Flash has a documented knowledge cutoff of 2023-11-01, while Llama 3.1 405B Instruct's cutoff date is not specified.

We can confirm Gemini 1.5 Flash's training data extends to 2023-11-01, but cannot make a direct comparison without Llama 3.1 405B Instruct's cutoff date.

Gemini 1.5 Flash

Nov 2023

Llama 3.1 405B Instruct

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Provider Availability

Gemini 1.5 Flash is available from Google. Llama 3.1 405B Instruct is available from Lambda, DeepInfra, Fireworks, Bedrock, Together, Hyperbolic, Google, Replicate. The availability of providers can affect quality of the model and reliability.