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GLM-5 vs o3
A detailed comparison of GLM-5 (Zhipu AI) and o3 (OpenAI) across pricing, performance, and features.
Pricing Comparison
| Metric | GLM-5 | o3 | Difference |
|---|---|---|---|
| Input / 1M tokens | $1.00 | $0.40 | -60% |
| Output / 1M tokens | $3.20 | $1.60 | -50% |
| Context window | 200K | 200K | — |
| Max output | 128K | 100K | — |
Benchmark Comparison
| Benchmark | GLM-5 | o3 |
|---|---|---|
| MMLU-Pro | 70.4% | 87% |
| HumanEval | 91% | 94.5% |
| GPQA | 72% | 79.2% |
Capabilities
| Capability | GLM-5 | o3 |
|---|---|---|
| code | ✓ | ✓ |
| reasoning | ✓ | ✓ |
| text | ✓ | ✓ |
| tool-use | ✓ | ✓ |
| vision | ✓ | ✓ |
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
o3 Strengths
- ✓Recently repriced — now very cheap
- ✓Excellent logical reasoning
- ✓200K context window
o3 Weaknesses
- ✗Slower due to reasoning overhead
- ✗Overkill for simple tasks
Quick Verdict
Best value: o3 is the more affordable option at $0.4/$1.6 per 1M tokens.
Higher benchmarks: o3 scores higher on average across available benchmarks (86.9% avg).
Choose o3 if cost matters most. Choose GLM-5 if you need the best possible quality for complex tasks.