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Gemini 3.8 Flash vs Grok-3 Mini

Gemini 3.8 Flash leads the LLM Stats Score 51.3 to 31.7. Grok-3 Mini is 4.3x cheaper per token.

Google · xAI · Updated for 2026

Which is better?

Gemini 3.8 Flash leads the overall LLM Stats Score 51.3 to 31.7, ranking #14 overall.

On price, Grok-3 Mini is roughly 4.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Gemini 3.8 Flash also accepts a larger context window (1,048,576 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 Gemini 3.8 Flash

  • overall performance matters — it scores 51.3 and ranks #14 on LLM Stats
  • your work emphasizes reasoning and coding — it leads those capability indexes
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Sep 2026

Choose Grok-3 Mini

  • cost matters — it's about 4.3x cheaper per token

At a glance

The differences that matter most.

Gemini 3.8 Flash
Google
Grok-3 Mini
xAI
Core performance indexes
LLM Stats Score
51.3
#14
31.7
#102
Reasoning
47.2
#23
31.3
#101
Coding
39.9
#12
18.9
#102
Cost, coverage & limits
Benchmark wins
—
—
Input price
$0.75 / M
$0.30 / M
Output price
$3.75 / M
$0.50 / M
Context window
1,048,576
128,000

Individual benchmarks

13 reported for Gemini 3.8 Flash · 4 for Grok-3 Mini

No common benchmarks found

Gemini 3.8 Flash and Grok-3 Minidon'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

Grok-3 Mini costs less

For input processing, Gemini 3.8 Flash ($0.75/1M tokens) is 2.5x more expensive than Grok-3 Mini ($0.30/1M tokens).

For output processing, Gemini 3.8 Flash ($3.75/1M tokens) is 7.5x more expensive than Grok-3 Mini ($0.50/1M tokens).

In conclusion, Gemini 3.8 Flash is more expensive than Grok-3 Mini.*

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

Lowest available price from all providers
Thu Sep 03 2026 • llm-stats.com
Google
Gemini 3.8 Flash
Input tokens$0.75
Output tokens$3.75
Best providerGoogle
xAI
Grok-3 Mini
Input tokens$0.30
Output tokens$0.50
Best providerxAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 3.8 Flash accepts 1,048,576 input tokens compared to Grok-3 Mini's 128,000 tokens. Gemini 3.8 Flash can generate longer responses up to 65,536 tokens, while Grok-3 Mini is limited to 8,000 tokens.

Google
Gemini 3.8 Flash
Input1,048,576 tokens
Output65,536 tokens
xAI
Grok-3 Mini
Input128,000 tokens
Output8,000 tokens
Thu Sep 03 2026 • llm-stats.com

Input capabilities

Documented input modalities across available providers

Both Gemini 3.8 Flash and Grok-3 Mini support multimodal inputs.

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

Gemini 3.8 Flash

Text
Images
Audio
Video

Grok-3 Mini

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 3.8 Flash

Proprietary

Closed source

Grok-3 Mini

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.8 Flash was released on 2026-09-02, while Grok-3 Mini was released on 2025-02-17.

Gemini 3.8 Flash is 19 months newer than Grok-3 Mini.

Gemini 3.8 Flash

Sep 2, 2026

0 days ago

1.5yr newer
Grok-3 Mini

Feb 17, 2025

1.5 years ago

Knowledge Cutoff

When training data ends

Gemini 3.8 Flash has a knowledge cutoff of 2026-03-31, while Grok-3 Mini has a cutoff of 2024-11-17.

Gemini 3.8 Flash has more recent training data (up to 2026-03-31), making it potentially better informed about events through that date compared to Grok-3 Mini (2024-11-17).

Gemini 3.8 Flash

Mar 2026

1.3 yr newer
Grok-3 Mini

Nov 2024

Provider Availability

Gemini 3.8 Flash is available from Google. Grok-3 Mini is available from xAI.

Gemini 3.8 Flash

google logo
Google
Input Price:Input: $0.75/1MOutput Price:Output: $3.75/1M

Grok-3 Mini

xai logo
xAI
Input Price:Input: $0.30/1MOutput Price:Output: $0.50/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Judge for yourself.

Run your own prompts against Gemini 3.8 Flash and Grok-3 Mini side-by-side, then vote on the output you prefer.

Gemini 3.8 Flash
✓ Preferred
Grok-3 Mini
Open in Playground

FAQ

Common questions about Gemini 3.8 Flash vs Grok-3 Mini.

Which is better, Gemini 3.8 Flash or Grok-3 Mini?

Gemini 3.8 Flash leads the LLM Stats Score 51.3 to 31.7. Gemini 3.8 Flash is made by Google and Grok-3 Mini is made by xAI. The best choice depends on your use case — compare their capability indexes, individual benchmarks, pricing, and limits above.

How does Gemini 3.8 Flash compare to Grok-3 Mini in benchmarks?

Gemini 3.8 Flash scores Terminal-Bench 2.1: 89.4%, LVBench: 87.1%, CharXiv-R: 86.2%, LABBench2: 86.2%, DeepSWE 1.1: 73.7%. Grok-3 Mini scores AIME 2024: 95.8%, AIME 2025: 90.8%, GPQA: 84.0%, LiveCodeBench: 80.4%.

Is Gemini 3.8 Flash cheaper than Grok-3 Mini?

Grok-3 Mini is 2.5x cheaper for input tokens. Gemini 3.8 Flash costs $0.75/M input and $3.75/M output via google. Grok-3 Mini costs $0.30/M input and $0.50/M output via xai.

What are the context window sizes for Gemini 3.8 Flash and Grok-3 Mini?

Gemini 3.8 Flash supports 1.0M tokens and Grok-3 Mini supports 128K tokens. A larger context window lets you process longer documents, conversations, or codebases in a single request.

What are the main differences between Gemini 3.8 Flash and Grok-3 Mini?

Key differences include LLM Stats Score (51.3 vs 31.7), context window (1.0M vs 128K), input pricing ($0.75 vs $0.30/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.8 Flash and Grok-3 Mini?

Gemini 3.8 Flash is developed by Google and Grok-3 Mini is developed by xAI.

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