LLM Comparison
GLM 5 vs GPT-5.6 Luna
Side-by-side specs, pricing & capabilities · Updated September 2026
Price vs Intelligence
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2/6 modelsSame tier:
| Organization | ||
| OpenTools Score | 64 42.4 | 52 74.7 |
| Family | GLM | GPT-5.6 |
| Status | Current | Current |
| Release Date | Feb 2026 | Jul 2026 |
| Context Window | 203K tokens | 1.1M tokens |
| Input Price | $0.72/M tokens | $0.20/M tokens |
| Output Price | $2.30/M tokens | $1.20/M tokens |
| Pricing Notes | — | OpenAI pricing page lists $1 input and $6 output per 1M tokens, plus GPT-5.6 cache-write and cache-read pricing. |
| Capabilities | textcode | textvisionreasoningcodingtool-useweb-searchfile-searchcomputer-useagents |
| Training Cutoff | — | Feb 16, 2026 |
| Max Output | 131K tokens | 128K tokens |
| API Identifier | z-ai/glm-5 | gpt-5.6-luna |
| Benchmarks | ||
| GPQA Diamond | 86https://huggingface.co/zai-org/GLM-5 | 91.1111artificial-analysis |
| Artificial Analysis Intelligence Index | — | 51artificial-analysis |
| Artificial Analysis Coding Agent Index | — | 74.6artificial-analysis |
| Artificial Analysis Intelligence Index v4.3 | — | 37.5048artificial-analysis |
| SciCode | — | 53.588artificial-analysis |
| Terminal-Bench 2.1 | — | 80.8989artificial-analysis |
| View GLM 5 | View GPT-5.6 Luna | |
Cost Calculator
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| Model | Input | Output | Total / mo | vs Best |
|---|---|---|---|---|
| GPT-5.6 LunaCheapest | $0.20 | $0.60 | $0.80 | — |
| GLM 5 | $0.72 | $1.15 | $1.87 | +134% |
Z.ai
GLM 5
GLM-5 is Z.ai's open-weight language model for agentic engineering, with 744B total and 40B active parameters. Its released checkpoint configuration supports 202,752 token positions; hosted service limits and prices depend on the provider.
OpenAI
GPT-5.6 Luna
GPT-5.6 Luna is OpenAI lower-cost GPT-5.6 model for high-volume reasoning, coding, and agentic workloads. OpenAI model docs list the same 1.05M token context window, 128K max output, and major tool support as the larger GPT-5.6 variants.
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