Model Comparison

Gemini 2.5 Pro Preview 06-05 vs GLM-5.1Which is better in 2026?

Both models are evenly matched across the benchmarks. GLM-5.1 is 1.6x cheaper per token.

Verdict: Gemini 2.5 Pro Preview 06-05 vs GLM-5.1 — which is better?

Gemini 2.5 Pro Preview 06-05 (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 2.5 Pro Preview 06-05 outperforms in 1 benchmarks (GPQA), while GLM-5.1 is better at 1 benchmark (Humanity's Last Exam). Both models are evenly matched across the benchmarks.

On price, GLM-5.1 is roughly 1.6x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

Gemini 2.5 Pro Preview 06-05 also accepts a larger context window (1,048,576 input tokens), making it the stronger choice for long documents and large codebases.

Choose Gemini 2.5 Pro Preview 06-05 if…

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

Choose GLM-5.1 if…

  • cost matters — it's about 1.6x 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

2 benchmarks

Gemini 2.5 Pro Preview 06-05 outperforms in 1 benchmarks (GPQA), while GLM-5.1 is better at 1 benchmark (Humanity's Last Exam).

Both models are evenly matched across the benchmarks.

Wed Jul 22 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 2.5 Pro Preview 06-05 ($1.25/1M tokens) is 1.1x cheaper than GLM-5.1 ($1.40/1M tokens).

For output processing, Gemini 2.5 Pro Preview 06-05 ($10.00/1M tokens) is 2.3x more expensive than GLM-5.1 ($4.40/1M tokens).

In conclusion, Gemini 2.5 Pro Preview 06-05 is more expensive than GLM-5.1.*

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

Lowest available price from all providers
Wed Jul 22 2026 • llm-stats.com
Google
Gemini 2.5 Pro Preview 06-05
Input tokens$1.25
Output tokens$10.00
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 2.5 Pro Preview 06-05 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 2.5 Pro Preview 06-05 is limited to 65,535 tokens.

Google
Gemini 2.5 Pro Preview 06-05
Input1,048,576 tokens
Output65,535 tokens
Zhipu AI
GLM-5.1
Input200,000 tokens
Output128,000 tokens
Wed Jul 22 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Gemini 2.5 Pro Preview 06-05 supports multimodal inputs, whereas GLM-5.1 does not.

Gemini 2.5 Pro Preview 06-05 can handle both text and other forms of data like images, making it suitable for multimodal applications.

Gemini 2.5 Pro Preview 06-05

Text
Images
Audio
Video

GLM-5.1

Text
Images
Audio
Video

License

Usage and distribution terms

Gemini 2.5 Pro Preview 06-05 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 2.5 Pro Preview 06-05

Proprietary

Closed source

GLM-5.1

MIT

Open weights

Release Timeline

When each model was launched

Gemini 2.5 Pro Preview 06-05 was released on 2025-06-05, while GLM-5.1 was released on 2026-04-07.

GLM-5.1 is 10 months newer than Gemini 2.5 Pro Preview 06-05.

Gemini 2.5 Pro Preview 06-05

Jun 5, 2025

1.1 years ago

GLM-5.1

Apr 7, 2026

3 months ago

10mo newer

Knowledge Cutoff

When training data ends

Gemini 2.5 Pro Preview 06-05 has a documented knowledge cutoff of 2025-01-31, while GLM-5.1's cutoff date is not specified.

We can confirm Gemini 2.5 Pro Preview 06-05's training data extends to 2025-01-31, but cannot make a direct comparison without GLM-5.1's cutoff date.

Gemini 2.5 Pro Preview 06-05

Jan 2025

GLM-5.1

—

Provider Availability

Gemini 2.5 Pro Preview 06-05 is available from Google. GLM-5.1 is available from FriendliAI, ZAI.

Gemini 2.5 Pro Preview 06-05

google logo
Google
Input Price:Input: $1.25/1MOutput Price:Output: $10.00/1M

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
Less expensive input tokens
Higher GPQA score (86.4% vs 86.2%)
Zhipu AI
Less expensive output tokens
Has open weights
Higher Humanity's Last Exam score (52.3% vs 21.6%)

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against Gemini 2.5 Pro Preview 06-05 and GLM-5.1 side-by-side, then vote on the output you prefer.

Gemini 2.5 Pro Preview 06-05
✓ Preferred
GLM-5.1
Open in Playground
AI Model Comparison Table
Feature
Google
Gemini 2.5 Pro Preview 06-05
Zhipu AI
GLM-5.1

FAQ

Common questions about Gemini 2.5 Pro Preview 06-05 vs GLM-5.1.

Which is better, Gemini 2.5 Pro Preview 06-05 or GLM-5.1?

Both models are evenly matched across the benchmarks. Gemini 2.5 Pro Preview 06-05 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 2.5 Pro Preview 06-05 compare to GLM-5.1 in benchmarks?

Gemini 2.5 Pro Preview 06-05 scores Global-MMLU-Lite: 89.2%, AIME 2025: 88.0%, FACTS Grounding: 87.8%, GPQA: 86.4%, VideoMMMU: 83.6%. 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 2.5 Pro Preview 06-05 cheaper than GLM-5.1?

Gemini 2.5 Pro Preview 06-05 is 1.1x cheaper for input tokens. Gemini 2.5 Pro Preview 06-05 costs $1.25/M input and $10.00/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 2.5 Pro Preview 06-05 and GLM-5.1?

Gemini 2.5 Pro Preview 06-05 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 2.5 Pro Preview 06-05 and GLM-5.1?

Key differences include context window (1.0M vs 200K), input pricing ($1.25 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 2.5 Pro Preview 06-05 and GLM-5.1?

Gemini 2.5 Pro Preview 06-05 is developed by Google and GLM-5.1 is developed by Zhipu AI.

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