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GPT-4o vs GLM-5
A detailed comparison of GPT-4o (OpenAI) and GLM-5 (Zhipu AI) across pricing, performance, and features.
Pricing Comparison
| Metric | GPT-4o | GLM-5 | Difference |
|---|---|---|---|
| Input / 1M tokens | $2.50 | $1.00 | -60% |
| Output / 1M tokens | $10.00 | $3.20 | -68% |
| Context window | 128K | 200K | — |
| Max output | 16.384K | 128K | — |
Benchmark Comparison
| Benchmark | GPT-4o | GLM-5 |
|---|---|---|
| MMLU-Pro | 80.5% | 70.4% |
| HumanEval | 91% | 91% |
| GPQA | 64.2% | 72% |
Capabilities
| Capability | GPT-4o | GLM-5 |
|---|---|---|
| audio | ✓ | ✗ |
| code | ✓ | ✓ |
| reasoning | ✗ | ✓ |
| text | ✓ | ✓ |
| tool-use | ✓ | ✓ |
| vision | ✓ | ✓ |
GPT-4o Strengths
- ✓Well-established and reliable
- ✓Large ecosystem of tools and integrations
GPT-4o Weaknesses
- ✗Being superseded by GPT-5 series
- ✗Higher price than newer, better alternatives
GLM-5 Strengths
- ✓Open-weight (MIT license) — self-hostable
- ✓77.8% SWE-Bench Verified — top-tier coding
- ✓128K max output — huge generation window
GLM-5 Weaknesses
- ✗MMLU-Pro lags behind Western flagships
- ✗744B parameters — heavy to self-host
- ✗China-based — availability concerns
Quick Verdict
Best value: GLM-5 is the more affordable option at $1/$3.2 per 1M tokens.
Higher benchmarks: GPT-4o scores higher on average across available benchmarks (78.6% avg).
Larger context: GLM-5 supports 200K tokens.
Choose GLM-5 if cost matters most. Choose GPT-4o if you need the best possible quality for complex tasks.