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o3 vs GLM-5
A detailed comparison of o3 (OpenAI) and GLM-5 (Zhipu AI) across pricing, performance, and features.
Pricing Comparison
| Metric | o3 | GLM-5 | Difference |
|---|---|---|---|
| Input / 1M tokens | $0.40 | $1.00 | +150% |
| Output / 1M tokens | $1.60 | $3.20 | +100% |
| Context window | 200K | 200K | — |
| Max output | 100K | 128K | — |
Benchmark Comparison
| Benchmark | o3 | GLM-5 |
|---|---|---|
| MMLU-Pro | 87% | 70.4% |
| HumanEval | 94.5% | 91% |
| GPQA | 79.2% | 72% |
Capabilities
| Capability | o3 | GLM-5 |
|---|---|---|
| code | ✓ | ✓ |
| reasoning | ✓ | ✓ |
| text | ✓ | ✓ |
| tool-use | ✓ | ✓ |
| vision | ✓ | ✓ |
o3 Strengths
- ✓Recently repriced — now very cheap
- ✓Excellent logical reasoning
- ✓200K context window
o3 Weaknesses
- ✗Slower due to reasoning overhead
- ✗Overkill for simple tasks
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: 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.