Model Comparison
GLM-4.5V (Reasoning)
vs. GPT-4o (ChatGPT)
Comparing 2 AI models · 12 benchmarks · Z AI, OpenAI
Recommended Pick
Z GLM-4.5V (Reasoning) 6 metric wins Strongest on: Throughput, Reasoning, Intelligence
Lowest Price
GPT-4o (ChatGPT)
$0.00/1M input price
Best Reasoning
GLM-4.5V (Reasoning)
45.9 reasoning score
Blends available reasoning benchmarks
Best for Coding
GLM-4.5V (Reasoning)
10.9 coding index
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
Differences That Matter
Price gap
GPT-4o (ChatGPT) is ∞x cheaper on input tokens than GLM-4.5V (Reasoning).
Reasoning gap
GLM-4.5V (Reasoning) leads GPT-4o (ChatGPT) by 15.3 points on reasoning.
Top-pick rationale
GLM-4.5V (Reasoning) wins 6 measurable categories, including Throughput, Reasoning, Intelligence, GPQA.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
GLM-4.5V (Reasoning)
Z AI
TTFT
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Time
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tok/s
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Tokens
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Cost
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GPT-4o (ChatGPT)
OpenAI
TTFT
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Time
—
tok/s
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Tokens
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Cost
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Which answer was more useful?
Full Comparison
| Metric | Top Pick Z GLM-4.5V (Reasoning) | Op GPT-4o (ChatGPT) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.60/1M | $0.00/1M |
| Output Cost | $1.80/1M | $0.00/1M |
| Blended (3:1) | $0.90/1M | — |
| Specifications | ||
| Organization | Z AI | OpenAI |
| Release Date | Aug 11, 2025 | Feb 15, 2025 |
| Performance & Speed | ||
| Throughput | 23.1 tok/s | — |
| TTFT | 1526ms | — |
| Latency | 88242ms | — |
| Composite Indices | ||
| Value Score | 100.0 | — |
| Reasoning Score | 45.9 | 30.6 |
| Intelligence | 9.1 | 8.2 |
| Coding | 10.9 | — |
| Math | 73.0 | — |
| Standard Benchmarks | ||
| GPQA | 68.4% | 51.1% |
| MMLU Pro | 78.8% | 77.3% |
| HLE | 5.9% | 3.7% |
| LiveCodeBench | 60.4% | — |
| MATH 500 | — | 79.7% |
| AIME 2025 | 73.0% | — |
| AIME (Original) | — | 10.3% |
| SciCode | 22.1% | 33.4% |
| LCR | 0.0% | 53.0% |
| IFBench | 34.2% | — |
| TAU-bench v2 | 22.5% | — |
| TerminalBench Hard | 5.3% | — |
Key Takeaways
GPT-4o (ChatGPT) offers the best value at $0.00/1M, making it ideal for high-volume applications and cost-conscious projects.
GLM-4.5V (Reasoning) has the strongest reasoning profile with a 45.9 reasoning score, combining the available reasoning-heavy benchmarks.
GLM-4.5V (Reasoning) reaches a 10.9 coding index, making it the top choice for software development and code generation tasks.
All models support context windows of ∞+ tokens, suitable for processing lengthy documents and maintaining extended conversations.
When to Choose Each Model
GLM-4.5V (Reasoning)
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
GPT-4o (ChatGPT)
- Cost-sensitive applications
- High-volume processing
