Model Comparison

GLM-4.5V vs GPT-4.5Which is better in 2026?

Comparing GLM-4.5V and GPT-4.5 across benchmarks, pricing, and capabilities.

Verdict: GLM-4.5V vs GPT-4.5 — which is better?

GLM-4.5V (by Zhipu AI) and GPT-4.5 (by OpenAI) 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-4.5V is roughly 97.7x cheaper per token on a blended 3:1 input/output basis, which adds up quickly at production volume.

GLM-4.5V also accepts a larger context window (131,072 input tokens), making it the stronger choice for long documents and large codebases.

Choose GLM-4.5V if…

  • cost matters — it's about 97.7x cheaper per token
  • you process long inputs — it offers a 131,072 token context window
  • you want the most recent training data — it shipped Aug 2025
  • you need open weights you can self-host or fine-tune

Choose GPT-4.5 if…

  • you want predictable pricing at $75.00/M input and $150.00/M output

Performance Benchmarks

Comparative analysis across standard metrics

No common benchmarks found

GLM-4.5V and GPT-4.5don'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-4.5V costs less

For input processing, GLM-4.5V ($0.55/1M tokens) is 136.4x cheaper than GPT-4.5 ($75.00/1M tokens).

For output processing, GLM-4.5V ($2.19/1M tokens) is 68.5x cheaper than GPT-4.5 ($150.00/1M tokens).

In conclusion, GPT-4.5 is more expensive than GLM-4.5V.*

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

Lowest available price from all providers
Sat Jul 18 2026 • llm-stats.com
Zhipu AI
GLM-4.5V
Input tokens$0.55
Output tokens$2.19
Best providerFireworks
OpenAI
GPT-4.5
Input tokens$75.00
Output tokens$150.00
Best providerOpenAI
Notice missing or incorrect data?Start an Issue→

Context Window

Maximum input and output token capacity

GLM-4.5V accepts 131,072 input tokens compared to GPT-4.5's 128,000 tokens. GLM-4.5V can generate longer responses up to 131,072 tokens, while GPT-4.5 is limited to 4,096 tokens.

Zhipu AI
GLM-4.5V
Input131,072 tokens
Output131,072 tokens
OpenAI
GPT-4.5
Input128,000 tokens
Output4,096 tokens
Sat Jul 18 2026 • llm-stats.com

Input Capabilities

Supported data types and modalities

Both GLM-4.5V and GPT-4.5 support multimodal inputs.

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

GLM-4.5V

Text
Images
Audio
Video

GPT-4.5

Text
Images
Audio
Video

License

Usage and distribution terms

GLM-4.5V is licensed under MIT, while GPT-4.5 uses a proprietary license.

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

GLM-4.5V

MIT

Open weights

GPT-4.5

Proprietary

Closed source

Release Timeline

When each model was launched

GLM-4.5V was released on 2025-08-11, while GPT-4.5 was released on 2025-02-27.

GLM-4.5V is 6 months newer than GPT-4.5.

GLM-4.5V

Aug 11, 2025

11 months ago

5mo newer
GPT-4.5

Feb 27, 2025

1.4 years ago

Knowledge Cutoff

When training data ends

Neither model specifies a knowledge cutoff date.

Unable to compare the recency of their training data.

No cutoff dates available

Provider Availability

GLM-4.5V is available from Fireworks, Novita. GPT-4.5 is available from OpenAI.

GLM-4.5V

fireworks logo
Fireworks
Input Price:Input: $0.55/1MOutput Price:Output: $2.19/1M
novita logo
Novita
Input Price:Input: $0.60/1MOutput Price:Output: $2.20/1M

GPT-4.5

openai logo
OpenAI
Input Price:Input: $75.00/1MOutput Price:Output: $150.00/1M
* Prices shown are per million tokens

Outputs Comparison

Notice missing or incorrect data?Start an Issue discussion→

Key Takeaways

Zhipu AI
Larger context window (131,072 tokens)
Less expensive input tokens
Less expensive output tokens
Has open weights
OpenAI

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

Detailed Comparison

Interactive Arena

Judge for yourself.

Run your own prompts against GLM-4.5V and GPT-4.5 side-by-side, then vote on the output you prefer.

GLM-4.5V
✓ Preferred
GPT-4.5
Open in Playground
AI Model Comparison Table
Feature
Zhipu AI
GLM-4.5V
OpenAI
GPT-4.5

FAQ

Common questions about GLM-4.5V vs GPT-4.5.

Which is better, GLM-4.5V or GPT-4.5?

GLM-4.5V (Zhipu AI) and GPT-4.5 (OpenAI) each have strengths in different areas. Compare their benchmark scores, pricing, context windows, and capabilities above to determine which fits your needs.

How does GLM-4.5V compare to GPT-4.5 in benchmarks?

GPT-4.5 scores GSM8k: 97.0%, MMLU: 90.8%, CharXiv-D: 90.0%, IFEval: 88.2%, HumanEval: 88.0%.

Is GLM-4.5V cheaper than GPT-4.5?

GLM-4.5V is 136.4x cheaper for input tokens. GLM-4.5V costs $0.55/M input and $2.19/M output via fireworks. GPT-4.5 costs $75.00/M input and $150.00/M output via openai.

What are the context window sizes for GLM-4.5V and GPT-4.5?

GLM-4.5V supports 131K tokens and GPT-4.5 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 GLM-4.5V and GPT-4.5?

Key differences include context window (131K vs 128K), input pricing ($0.55 vs $75.00/M), licensing (MIT vs Proprietary). See the full comparison above for benchmark-by-benchmark results.

Who makes GLM-4.5V and GPT-4.5?

GLM-4.5V is developed by Zhipu AI and GPT-4.5 is developed by OpenAI.

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