Model Comparison

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

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

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

GPT-5.5 (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 5.9x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

GPT-5.5 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 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 5.9x cheaper per token

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

GPT-5.5 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 ($5.00/1M tokens) is 4.2x more expensive than GLM-5V-Turbo ($1.20/1M tokens).

For output processing, GPT-5.5 ($30.00/1M tokens) is 7.5x more expensive than GLM-5V-Turbo ($4.00/1M tokens).

In conclusion, GPT-5.5 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
Input tokens$5.00
Output tokens$30.00
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 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
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 and GLM-5V-Turbo support multimodal inputs.

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

GPT-5.5

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

Proprietary

Closed source

GLM-5V-Turbo

Proprietary

Closed source

Release Timeline

When each model was launched

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

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

GPT-5.5

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

GPT-5.5

Dec 2025

GLM-5V-Turbo

—

Provider Availability

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

GPT-5.5

openai logo
OpenAI
Input Price:Input: $5.00/1MOutput Price:Output: $30.00/1M

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 and GLM-5V-Turbo side-by-side, then vote on the output you prefer.

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

FAQ

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

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

GPT-5.5 (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 compare to GLM-5V-Turbo in benchmarks?

GPT-5.5 scores Tau2 Telecom: 98.0%, ARC-AGI: 95.0%, GPQA: 93.6%, ARC-AGI v2: 85.0%, GDPval-MM: 84.9%. 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 cheaper than GLM-5V-Turbo?

GLM-5V-Turbo is 4.2x cheaper for input tokens. GPT-5.5 costs $5.00/M input and $30.00/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 and GLM-5V-Turbo?

GPT-5.5 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 and GLM-5V-Turbo?

Key differences include context window (1.1M vs 200K), input pricing ($5.00 vs $1.20/M). See the full comparison above for benchmark-by-benchmark results.

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

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

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