Model Comparison

Gemini 3 Flash vs Grok-3Which is better in 2026?

Gemini 3 Flash significantly outperforms across most benchmarks. Gemini 3 Flash is 5.3x cheaper per token.

Verdict: Gemini 3 Flash vs Grok-3 — which is better?

Gemini 3 Flash (by Google) and Grok-3 (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 3 Flash outperforms in 2 benchmarks (AIME 2025, GPQA), while Grok-3 is better at 0 benchmarks. Gemini 3 Flash significantly outperforms across most benchmarks.

On price, Gemini 3 Flash is roughly 5.3x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Gemini 3 Flash also accepts a larger context window (1,000,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose Gemini 3 Flash if…

  • you want the strongest raw capability — it leads on 2 of 2 shared benchmarks
  • cost matters — it's about 5.3x cheaper per token
  • you process long inputs — it offers a 1,000,000 token context window
  • you want the most recent training data — it shipped Dec 2025

Choose Grok-3 if…

  • you want predictable pricing at $3.00/M input and $15.00/M output
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Performance Benchmarks

Comparative analysis across standard metrics

2 benchmarks

Gemini 3 Flash outperforms in 2 benchmarks (AIME 2025, GPQA), while Grok-3 is better at 0 benchmarks.

Gemini 3 Flash significantly outperforms across most benchmarks.

Sun Jun 07 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

Gemini 3 Flash costs less

For input processing, Gemini 3 Flash ($0.50/1M tokens) is 6.0x cheaper than Grok-3 ($3.00/1M tokens).

For output processing, Gemini 3 Flash ($3.00/1M tokens) is 5.0x cheaper than Grok-3 ($15.00/1M tokens).

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

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

Lowest available price from all providers
Sun Jun 07 2026 • llm-stats.com
Google
Gemini 3 Flash
Input tokens$0.50
Output tokens$3.00
Best providerGoogle
xAI
Grok-3
Input tokens$3.00
Output tokens$15.00
Best providerxAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

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

Google
Gemini 3 Flash
Input1,000,000 tokens
Output65,536 tokens
xAI
Grok-3
Input128,000 tokens
Output8,000 tokens
Sun Jun 07 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

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

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

Gemini 3 Flash

Text
Images
Audio
Video

Grok-3

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 Flash

Proprietary

Closed source

Grok-3

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3 Flash was released on 2025-12-17, while Grok-3 was released on 2025-02-17.

Gemini 3 Flash is 10 months newer than Grok-3.

Gemini 3 Flash

Dec 17, 2025

5 months ago

10mo newer
Grok-3

Feb 17, 2025

1.3 years ago

Knowledge Cutoff

When training data ends

Gemini 3 Flash has a knowledge cutoff of 2025-01-31, while Grok-3 has a cutoff of 2024-11-17.

Gemini 3 Flash has more recent training data (up to 2025-01-31), making it potentially better informed about events through that date compared to Grok-3 (2024-11-17).

Gemini 3 Flash

Jan 2025

2 mo newer
Grok-3

Nov 2024

Provider Availability

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

Gemini 3 Flash

google logo
Google
Input Price:Input: $0.50/1MOutput Price:Output: $3.00/1M

Grok-3

xai logo
xAI
Input Price:Input: $3.00/1MOutput Price:Output: $15.00/1M
* Prices shown are per million tokens

Outputs Comparison

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Key Takeaways

Google
Larger context window (1,000,000 tokens)
Less expensive input tokens
Less expensive output tokens
Higher AIME 2025 score (99.7% vs 93.3%)
Higher GPQA score (90.4% vs 84.6%)
xAI

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

GoogleGemini 3 Flash
xAIGrok-3
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Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemini 3 Flash
xAI
Grok-3

FAQ

Common questions about Gemini 3 Flash vs Grok-3.

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

Gemini 3 Flash significantly outperforms across most benchmarks. Gemini 3 Flash is made by Google and Grok-3 is made by xAI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

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

Gemini 3 Flash scores Vending-Bench 2: 100.0%, AIME 2025: 99.7%, Global PIQA: 92.8%, MMMLU: 91.8%, GPQA: 90.4%. Grok-3 scores AIME 2024: 93.3%, AIME 2025: 93.3%, GPQA: 84.6%, LiveCodeBench: 79.4%, MMMU: 78.0%.

Is Gemini 3 Flash cheaper than Grok-3?

Gemini 3 Flash is 6.0x cheaper for input tokens. Gemini 3 Flash costs $0.50/M input and $3.00/M output via google. Grok-3 costs $3.00/M input and $15.00/M output via xai.

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

Gemini 3 Flash supports 1.0M tokens and Grok-3 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 Flash and Grok-3?

Key differences include context window (1.0M vs 128K), input pricing ($0.50 vs $3.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3 Flash and Grok-3?

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

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