Model Comparison

Gemini 1.5 Flash 8B vs Grok-1.5VWhich is better in 2026?

Gemini 1.5 Flash 8B significantly outperforms across most benchmarks.

Verdict: Gemini 1.5 Flash 8B vs Grok-1.5V — which is better?

Gemini 1.5 Flash 8B (by Google) and Grok-1.5V (by xAI) are two of the AI models people compare most. Here is how they stack up on benchmarks, price and capabilities, and which one to pick in 2026.

Gemini 1.5 Flash 8B outperforms in 2 benchmarks (MathVista, MMMU), while Grok-1.5V is better at 0 benchmarks. Gemini 1.5 Flash 8B significantly outperforms across most benchmarks.

Choose Gemini 1.5 Flash 8B if…

  • you want the strongest raw capability — it leads on 2 of 2 shared benchmarks

Choose Grok-1.5V if…

  • you want the most recent training data — it shipped Apr 2024
Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

Gemini 1.5 Flash 8B outperforms in 2 benchmarks (MathVista, MMMU), while Grok-1.5V is better at 0 benchmarks.

Gemini 1.5 Flash 8B significantly outperforms across most benchmarks.

Sat Jun 20 2026 • llm-stats.com

Arena Performance

Human preference votes

Context Window

Maximum input and output token capacity

Only Gemini 1.5 Flash 8B specifies input context (1,048,576 tokens). Only Gemini 1.5 Flash 8B specifies output context (8,192 tokens).

Google
Gemini 1.5 Flash 8B
Input1,048,576 tokens
Output8,192 tokens
xAI
Grok-1.5V
Input- tokens
Output- tokens
Sat Jun 20 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both Gemini 1.5 Flash 8B and Grok-1.5V support multimodal inputs.

They are both capable of processing various types of data, offering versatility in application.

Gemini 1.5 Flash 8B

Text
Images
Audio
Video

Grok-1.5V

Text
Images
Audio
Video

License

Usage and distribution terms

Both models are licensed under proprietary licenses.

Both models have usage restrictions defined by their respective organizations.

Gemini 1.5 Flash 8B

Proprietary

Closed source

Grok-1.5V

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 1.5 Flash 8B was released on 2024-03-15, while Grok-1.5V was released on 2024-04-12.

Grok-1.5V is 1 month newer than Gemini 1.5 Flash 8B.

Gemini 1.5 Flash 8B

Mar 15, 2024

2.3 years ago

Grok-1.5V

Apr 12, 2024

2.2 years ago

4w newer

Knowledge Cutoff

When training data ends

Gemini 1.5 Flash 8B has a documented knowledge cutoff of 2024-10-01, while Grok-1.5V's cutoff date is not specified.

We can confirm Gemini 1.5 Flash 8B's training data extends to 2024-10-01, but cannot make a direct comparison without Grok-1.5V's cutoff date.

Gemini 1.5 Flash 8B

Oct 2024

Grok-1.5V

—

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Google
Larger context window (1,048,576 tokens)
Higher MathVista score (54.7% vs 52.8%)
Higher MMMU score (53.7% vs 53.6%)
xAI

No standout differentiators in the data we have for this pair.

GoogleGemini 1.5 Flash 8B
xAIGrok-1.5V
Compare in Playground

Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemini 1.5 Flash 8B
xAI
Grok-1.5V

FAQ

Common questions about Gemini 1.5 Flash 8B vs Grok-1.5V.

Which is better, Gemini 1.5 Flash 8B or Grok-1.5V?

Gemini 1.5 Flash 8B significantly outperforms across most benchmarks. Gemini 1.5 Flash 8B is made by Google and Grok-1.5V is made by xAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemini 1.5 Flash 8B compare to Grok-1.5V in benchmarks?

Gemini 1.5 Flash 8B scores XSTest: 92.6%, FLEURS: 86.4%, Natural2Code: 75.5%, WMT23: 72.6%, Video-MME: 66.2%. Grok-1.5V scores AI2D: 88.3%, DocVQA: 85.6%, TextVQA: 78.1%, ChartQA: 76.1%, RealWorldQA: 68.7%.

What are the context window sizes for Gemini 1.5 Flash 8B and Grok-1.5V?

Gemini 1.5 Flash 8B supports 1.0M tokens and Grok-1.5V supports an unknown number of tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

Who makes Gemini 1.5 Flash 8B and Grok-1.5V?

Gemini 1.5 Flash 8B is developed by Google and Grok-1.5V is developed by xAI.

Related comparisons