Model Comparison

Gemini 3.1 Pro vs Grok-3Which is better in 2026?

Gemini 3.1 Pro significantly outperforms across most benchmarks. Gemini 3.1 Pro is 1.1x cheaper per token.

Verdict: Gemini 3.1 Pro vs Grok-3 — which is better?

Gemini 3.1 Pro (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 3.1 Pro outperforms in 1 benchmarks (GPQA), while Grok-3 is better at 0 benchmarks. Gemini 3.1 Pro significantly outperforms across most benchmarks.

On price, Gemini 3.1 Pro is roughly 1.1x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Gemini 3.1 Pro also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Choose Gemini 3.1 Pro if…

  • you want the strongest raw capability — it leads on 1 of 1 shared benchmarks
  • cost matters — it's about 1.1x cheaper per token
  • you process long inputs — it offers a 1,048,576 token context window
  • you want the most recent training data — it shipped Feb 2026

Choose Grok-3 if…

  • you want predictable pricing at $3.00/M input and $15.00/M output
Want to compare interactively?Try the playground

Performance Benchmarks

Comparative analysis across standard metrics

1 benchmarks

Gemini 3.1 Pro outperforms in 1 benchmarks (GPQA), while Grok-3 is better at 0 benchmarks.

Gemini 3.1 Pro 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 3.1 Pro costs less

For input processing, Gemini 3.1 Pro ($2.50/1M tokens) is 1.2x cheaper than Grok-3 ($3.00/1M tokens).

For output processing, Gemini 3.1 Pro ($15.00/1M tokens) costs the same as Grok-3 ($15.00/1M tokens).

In conclusion, Grok-3 is more expensive than Gemini 3.1 Pro.*

* 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 3.1 Pro
Input tokens$2.50
Output tokens$15.00
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 3.1 Pro accepts 1,048,576 input tokens compared to Grok-3's 128,000 tokens. Gemini 3.1 Pro can generate longer responses up to 65,536 tokens, while Grok-3 is limited to 8,000 tokens.

Google
Gemini 3.1 Pro
Input1,048,576 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 3.1 Pro and Grok-3 support multimodal inputs.

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

Gemini 3.1 Pro

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 3.1 Pro

Proprietary

Closed source

Grok-3

Proprietary

Closed source

Release Timeline

When each model was launched

Gemini 3.1 Pro was released on 2026-02-19, while Grok-3 was released on 2025-02-17.

Gemini 3.1 Pro is 12 months newer than Grok-3.

Gemini 3.1 Pro

Feb 19, 2026

3 months ago

1.0yr newer
Grok-3

Feb 17, 2025

1.3 years ago

Knowledge Cutoff

When training data ends

Gemini 3.1 Pro has a knowledge cutoff of 2025-01-31, while Grok-3 has a cutoff of 2024-11-17.

Gemini 3.1 Pro 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 3.1 Pro

Jan 2025

2 mo newer
Grok-3

Nov 2024

Provider Availability

Gemini 3.1 Pro is available from Google. Grok-3 is available from xAI.

Gemini 3.1 Pro

google logo
Google
Input Price:Input: $2.50/1MOutput Price:Output: $15.00/1M

Grok-3

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

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Google
Larger context window (1,048,576 tokens)
Less expensive input tokens
Higher GPQA score (94.3% vs 84.6%)
xAI

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

GoogleGemini 3.1 Pro
xAIGrok-3
Compare in Playground

Detailed Comparison

AI Model Comparison Table
Feature
Google
Gemini 3.1 Pro
xAI
Grok-3

FAQ

Common questions about Gemini 3.1 Pro vs Grok-3.

Which is better, Gemini 3.1 Pro or Grok-3?

Gemini 3.1 Pro significantly outperforms across most benchmarks. Gemini 3.1 Pro 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 3.1 Pro compare to Grok-3 in benchmarks?

Gemini 3.1 Pro scores t2-bench: 99.3%, LiveCodeBench Pro: 96.2%, GPQA: 94.3%, MMMLU: 92.6%, BrowseComp: 85.9%. Grok-3 scores AIME 2024: 93.3%, AIME 2025: 93.3%, GPQA: 84.6%, LiveCodeBench: 79.4%, MMMU: 78.0%.

Is Gemini 3.1 Pro cheaper than Grok-3?

Gemini 3.1 Pro is 1.2x cheaper for input tokens. Gemini 3.1 Pro costs $2.50/M input and $15.00/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 3.1 Pro and Grok-3?

Gemini 3.1 Pro 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 3.1 Pro and Grok-3?

Key differences include context window (1.0M vs 128K), input pricing ($2.50 vs $3.00/M). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3.1 Pro and Grok-3?

Gemini 3.1 Pro is developed by Google and Grok-3 is developed by xAI.

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