Model Comparison

Gemini 3 Pro vs GLM-5.1Which is better in 2026?

Both models are evenly matched across the benchmarks. GLM-5.1 is 2.1x cheaper per token.

Verdict: Gemini 3 Pro vs GLM-5.1 — which is better?

Gemini 3 Pro (by Google) and GLM-5.1 (by Zhipu AI) 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 Pro outperforms in 2 benchmarks (GPQA, LiveBench), while GLM-5.1 is better at 2 benchmarks (Humanity's Last Exam, Terminal-Bench 2.0). Both models are evenly matched across the benchmarks.

On price, GLM-5.1 is roughly 2.1x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Gemini 3 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 Pro if…

  • you process long inputs — it offers a 1,048,576 token context window

Choose GLM-5.1 if…

  • you want the strongest raw capability — it leads on 3 of 5 shared benchmarks
  • cost matters — it's about 2.1x cheaper per token
  • you want the most recent training data — it shipped Apr 2026
  • you need open weights you can self-host or fine-tune

Performance Benchmarks

Comparative analysis across standard metrics

5 benchmarks

Gemini 3 Pro outperforms in 2 benchmarks (GPQA, LiveBench), while GLM-5.1 is better at 2 benchmarks (Humanity's Last Exam, Terminal-Bench 2.0).

Both models are evenly matched across the benchmarks.

Fri Jul 17 2026 • llm-stats.com

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GLM-5.1 costs less

For input processing, Gemini 3 Pro ($2.00/1M tokens) is 1.4x more expensive than GLM-5.1 ($1.40/1M tokens).

For output processing, Gemini 3 Pro ($12.00/1M tokens) is 2.7x more expensive than GLM-5.1 ($4.40/1M tokens).

In conclusion, Gemini 3 Pro is more expensive than GLM-5.1.*

* 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 Pro
Input tokens$2.00
Output tokens$12.00
Best providerGoogle
Zhipu AI
GLM-5.1
Input tokens$1.40
Output tokens$4.40
Best providerFriendliAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

Gemini 3 Pro accepts 1,048,576 input tokens compared to GLM-5.1's 200,000 tokens. GLM-5.1 can generate longer responses up to 128,000 tokens, while Gemini 3 Pro is limited to 65,536 tokens.

Google
Gemini 3 Pro
Input1,048,576 tokens
Output65,536 tokens
Zhipu AI
GLM-5.1
Input200,000 tokens
Output128,000 tokens
Fri Jul 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Gemini 3 Pro supports multimodal inputs, whereas GLM-5.1 does not.

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

Gemini 3 Pro

Text
Images
Audio
Video

GLM-5.1

Text
Images
Audio
Video

License

Usage and distribution terms

Gemini 3 Pro is licensed under a proprietary license, while GLM-5.1 uses MIT.

License differences may affect how you can use these models in commercial or open-source projects.

Gemini 3 Pro

Proprietary

Closed source

GLM-5.1

MIT

Open weights

Release Timeline

When each model was launched

Gemini 3 Pro was released on 2025-11-18, while GLM-5.1 was released on 2026-04-07.

GLM-5.1 is 5 months newer than Gemini 3 Pro.

Gemini 3 Pro

Nov 18, 2025

8 months ago

GLM-5.1

Apr 7, 2026

3 months ago

4mo newer

Knowledge Cutoff

When training data ends

Gemini 3 Pro has a documented knowledge cutoff of 2025-01-31, while GLM-5.1's cutoff date is not specified.

We can confirm Gemini 3 Pro's training data extends to 2025-01-31, but cannot make a direct comparison without GLM-5.1's cutoff date.

Gemini 3 Pro

Jan 2025

GLM-5.1

—

Provider Availability

Gemini 3 Pro is available from Google. GLM-5.1 is available from FriendliAI, ZAI.

Gemini 3 Pro

google logo
Google
Input Price:Input: $2.00/1MOutput Price:Output: $12.00/1M

GLM-5.1

friendli logo
FriendliAI
Input Price:Input: $1.40/1MOutput Price:Output: $4.40/1M
z logo
Unknown Organization
Input Price:Input: $1.40/1MOutput Price:Output: $4.40/1M
* 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)
Supports multimodal inputs
Higher GPQA score (91.9% vs 86.2%)
Higher LiveBench score (73.4% vs 70.2%)
Zhipu AI
Less expensive input tokens
Less expensive output tokens
Has open weights
Higher Humanity's Last Exam score (52.3% vs 45.8%)
Higher Terminal-Bench 2.0 score (69.0% vs 54.2%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Gemini 3 Pro and GLM-5.1 side-by-side, then vote on the output you prefer.

Gemini 3 Pro
✓ Preferred
GLM-5.1
Open in Playground
AI Model Comparison Table
Feature
Google
Gemini 3 Pro
Zhipu AI
GLM-5.1

FAQ

Common questions about Gemini 3 Pro vs GLM-5.1.

Which is better, Gemini 3 Pro or GLM-5.1?

Both models are evenly matched across the benchmarks. Gemini 3 Pro is made by Google and GLM-5.1 is made by Zhipu AI. The best choice depends on your use case — compare their benchmark scores, pricing, and capabilities above.

How does Gemini 3 Pro compare to GLM-5.1 in benchmarks?

Gemini 3 Pro scores AIME 2025: 100.0%, Vending-Bench 2: 100.0%, Global PIQA: 93.4%, GPQA: 91.9%, MMMLU: 91.8%. GLM-5.1 scores Vending-Bench 2: 100.0%, AIME 2026: 95.3%, HMMT 2025: 94.0%, GPQA: 86.2%, IMO-AnswerBench: 83.8%.

Is Gemini 3 Pro cheaper than GLM-5.1?

GLM-5.1 is 1.4x cheaper for input tokens. Gemini 3 Pro costs $2.00/M input and $12.00/M output via google. GLM-5.1 costs $1.40/M input and $4.40/M output via friendli.

What are the context window sizes for Gemini 3 Pro and GLM-5.1?

Gemini 3 Pro supports 1.0M tokens and GLM-5.1 supports 200K 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 Pro and GLM-5.1?

Key differences include context window (1.0M vs 200K), input pricing ($2.00 vs $1.40/M), multimodal support (yes vs no), licensing (Proprietary vs MIT). See the full comparison above for benchmark-by-benchmark results.

Who makes Gemini 3 Pro and GLM-5.1?

Gemini 3 Pro is developed by Google and GLM-5.1 is developed by Zhipu AI.

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