Model Comparison

GPT-5.5 Pro vs GLM-5V-TurboWhich is better in 2026?

Comparing GPT-5.5 Pro and GLM-5V-Turbo across benchmarks, pricing, and capabilities.

Verdict: GPT-5.5 Pro vs GLM-5V-Turbo — which is better?

GPT-5.5 Pro (by OpenAI) and GLM-5V-Turbo (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.

On price, GLM-5V-Turbo is roughly 35.5x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

GPT-5.5 Pro also accepts a larger context window (1,050,000 input tokens), making it the stronger choice for long documents and large codebases.

Choose GPT-5.5 Pro if…

  • you process long inputs — it offers a 1,050,000 token context window
  • you want the most recent training data — it shipped Apr 2026

Choose GLM-5V-Turbo if…

  • cost matters — it's about 35.5x cheaper per token

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

GPT-5.5 Pro and GLM-5V-Turbodon't have any common benchmark datasets to compare. They may have been evaluated on different testing suites.

Arena Performance

Human preference votes

Pricing Analysis

Price comparison per million tokens

GLM-5V-Turbo costs less

For input processing, GPT-5.5 Pro ($30.00/1M tokens) is 25.0x more expensive than GLM-5V-Turbo ($1.20/1M tokens).

For output processing, GPT-5.5 Pro ($180.00/1M tokens) is 45.0x more expensive than GLM-5V-Turbo ($4.00/1M tokens).

In conclusion, GPT-5.5 Pro is more expensive than GLM-5V-Turbo.*

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

Lowest available price from all providers
Fri Jul 17 2026 • llm-stats.com
OpenAI
GPT-5.5 Pro
Input tokens$30.00
Output tokens$180.00
Best providerOpenAI
Zhipu AI
GLM-5V-Turbo
Input tokens$1.20
Output tokens$4.00
Best providerUnknown Organization
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GPT-5.5 Pro accepts 1,050,000 input tokens compared to GLM-5V-Turbo's 200,000 tokens. Both models can generate responses up to 128,000 tokens.

OpenAI
GPT-5.5 Pro
Input1,050,000 tokens
Output128,000 tokens
Zhipu AI
GLM-5V-Turbo
Input200,000 tokens
Output128,000 tokens
Fri Jul 17 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GPT-5.5 Pro and GLM-5V-Turbo support multimodal inputs.

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

GPT-5.5 Pro

Text
Images
Audio
Video

GLM-5V-Turbo

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.

GPT-5.5 Pro

Proprietary

Closed source

GLM-5V-Turbo

Proprietary

Closed source

Release Timeline

When each model was launched

GPT-5.5 Pro was released on 2026-04-23, while GLM-5V-Turbo was released on 2026-04-02.

GPT-5.5 Pro is 1 month newer than GLM-5V-Turbo.

GPT-5.5 Pro

Apr 23, 2026

2 months ago

3w newer
GLM-5V-Turbo

Apr 2, 2026

3 months ago

Knowledge Cutoff

When training data ends

GPT-5.5 Pro has a documented knowledge cutoff of 2025-12-01, while GLM-5V-Turbo's cutoff date is not specified.

We can confirm GPT-5.5 Pro's training data extends to 2025-12-01, but cannot make a direct comparison without GLM-5V-Turbo's cutoff date.

GPT-5.5 Pro

Dec 2025

GLM-5V-Turbo

—

Provider Availability

GPT-5.5 Pro is available from OpenAI. GLM-5V-Turbo is available from ZAI.

GPT-5.5 Pro

openai logo
OpenAI
Input Price:Input: $30.00/1MOutput Price:Output: $180.00/1M

GLM-5V-Turbo

z logo
Unknown Organization
Input Price:Input: $1.20/1MOutput Price:Output: $4.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

OpenAI
Larger context window (1,050,000 tokens)
Zhipu AI
Less expensive input tokens
Less expensive output tokens

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against GPT-5.5 Pro and GLM-5V-Turbo side-by-side, then vote on the output you prefer.

GPT-5.5 Pro
✓ Preferred
GLM-5V-Turbo
Open in Playground
AI Model Comparison Table
Feature
OpenAI
GPT-5.5 Pro
Zhipu AI
GLM-5V-Turbo

FAQ

Common questions about GPT-5.5 Pro vs GLM-5V-Turbo.

Which is better, GPT-5.5 Pro or GLM-5V-Turbo?

GPT-5.5 Pro (OpenAI) and GLM-5V-Turbo (Zhipu AI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does GPT-5.5 Pro compare to GLM-5V-Turbo in benchmarks?

GPT-5.5 Pro scores BrowseComp: 90.1%, GDPval-MM: 82.3%, Humanity's Last Exam: 57.2%, FrontierMath: 39.6%, GeneBench: 33.2%. GLM-5V-Turbo scores Design2Code: 94.8%, Flame-VLM-Code: 93.8%, V*: 89.0%, WebVoyager: 88.5%, PinchBench: 80.7%.

Is GPT-5.5 Pro cheaper than GLM-5V-Turbo?

GLM-5V-Turbo is 25.0x cheaper for input tokens. GPT-5.5 Pro costs $30.00/M input and $180.00/M output via openai. GLM-5V-Turbo costs $1.20/M input and $4.00/M output via z.

What are the context window sizes for GPT-5.5 Pro and GLM-5V-Turbo?

GPT-5.5 Pro supports 1.1M tokens and GLM-5V-Turbo 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 GPT-5.5 Pro and GLM-5V-Turbo?

Key differences include context window (1.1M vs 200K), input pricing ($30.00 vs $1.20/M). See the full comparison above for benchmark-by-benchmark results.

Who makes GPT-5.5 Pro and GLM-5V-Turbo?

GPT-5.5 Pro is developed by OpenAI and GLM-5V-Turbo is developed by Zhipu AI.

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