Model Comparison

Gemini 3 Flash vs Grok 4.3Which is better in 2026?

Gemini 3 Flash significantly outperforms across most benchmarks. Gemini 3 Flash is 1.4x cheaper per token.

Verdict: Gemini 3 Flash vs Grok 4.3 — which is better?

Gemini 3 Flash (by Google) and Grok 4.3 (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 1 benchmarks (Finance Agent v2), while Grok 4.3 is better at 0 benchmarks. Gemini 3 Flash significantly outperforms across most benchmarks.

On price, Gemini 3 Flash is roughly 1.4x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Choose Gemini 3 Flash if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • cost matters — it's about 1.4x cheaper per token

Choose Grok 4.3 if…

  • you want the most recent training data — it shipped May 2026

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Gemini 3 Flash outperforms in 1 benchmarks (Finance Agent v2), while Grok 4.3 is better at 0 benchmarks.

Gemini 3 Flash significantly outperforms across most benchmarks.

Fri Jul 17 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 2.5x cheaper than Grok 4.3 ($1.25/1M tokens).

For output processing, Gemini 3 Flash ($3.00/1M tokens) is 1.2x more expensive than Grok 4.3 ($2.50/1M tokens).

In conclusion, Grok 4.3 is more expensive than Gemini 3 Flash.*

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

Lowest available price from all providers
Fri Jul 17 2026 • llm-stats.com
Google
Gemini 3 Flash
Input tokens$0.50
Output tokens$3.00
Best providerGoogle
xAI
Grok 4.3
Input tokens$1.25
Output tokens$2.50
Best providerxAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Both models have the same input context window of 1,000,000 tokens. Only Gemini 3 Flash specifies output context (65,536 tokens).

Google
Gemini 3 Flash
Input1,000,000 tokens
Output65,536 tokens
xAI
Grok 4.3
Input1,000,000 tokens
Output- tokens
Fri Jul 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Gemini 3 Flash supports multimodal inputs, whereas Grok 4.3 does not.

Gemini 3 Flash can handle both text and other forms of data like images, making it suitable for multimodal applications.

Gemini 3 Flash

Text
Images
Audio
Video

Grok 4.3

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 4.3

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3 Flash was released on 2025-12-17, while Grok 4.3 was released on 2026-05-06.

Grok 4.3 is 5 months newer than Gemini 3 Flash.

Gemini 3 Flash

Dec 17, 2025

7 months ago

Grok 4.3

May 6, 2026

2 months ago

4mo newer

Knowledge Cutoff

When training data ends

Gemini 3 Flash has a documented knowledge cutoff of 2025-01-31, while Grok 4.3's cutoff date is not specified.

We can confirm Gemini 3 Flash's training data extends to 2025-01-31, but cannot make a direct comparison without Grok 4.3's cutoff date.

Gemini 3 Flash

Jan 2025

Grok 4.3

—

Provider Availability

Gemini 3 Flash is available from Google. Grok 4.3 is available from xAI.

Gemini 3 Flash

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

Grok 4.3

xai logo
xAI
Input Price:Input: $1.25/1MOutput Price:Output: $2.50/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Google
Supports multimodal inputs
Less expensive input tokens
Higher Finance Agent v2 score (42.5% vs 37.7%)
xAI
Less expensive output tokens

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Gemini 3 Flash and Grok 4.3 side-by-side, then vote on the output you prefer.

Gemini 3 Flash
✓ Preferred
Grok 4.3
Open in Playground
AI Model Comparison Table
Feature
Google
Gemini 3 Flash
xAI
Grok 4.3

FAQ

Common questions about Gemini 3 Flash vs Grok 4.3.

Which is better, Gemini 3 Flash or Grok 4.3?

Gemini 3 Flash significantly outperforms across most benchmarks. Gemini 3 Flash is made by Google and Grok 4.3 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 4.3 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 4.3 scores Finance Agent v2: 37.7%, GDPval-AA: 36.7%.

Is Gemini 3 Flash cheaper than Grok 4.3?

Gemini 3 Flash is 2.5x cheaper for input tokens. Gemini 3 Flash costs $0.50/M input and $3.00/M output via google. Grok 4.3 costs $1.25/M input and $2.50/M output via xai.

What are the context window sizes for Gemini 3 Flash and Grok 4.3?

Gemini 3 Flash supports 1.0M tokens and Grok 4.3 supports 1.0M 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 4.3?

Key differences include input pricing ($0.50 vs $1.25/M), multimodal support (yes vs no). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3 Flash and Grok 4.3?

Gemini 3 Flash is developed by Google and Grok 4.3 is developed by xAI.

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