gpt-oss-120b is an open-weight, 117B-parameter Mixture-of-Experts (MoE) language model from OpenAI designed for high-reasoning, agentic, and general-purpose production use cases. It activates 5.1B parameters per forward pass and is optimize…
Model details →OpenAI: gpt-oss-120b (batch) vs Z.ai: GLM 4.5 Air
OpenAI: gpt-oss-120b (batch) and Z.ai: GLM 4.5 Air are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
GLM-4.5-Air is the lightweight variant of our latest flagship model family, also purpose-built for agent-centric applications. Like GLM-4.5, it adopts the Mixture-of-Experts (MoE) architecture but with a more compact parameter...
Model details →Side-by-side comparison
| Capability | OpenAI: gpt-oss-120b (batch) | Z.ai: GLM 4.5 Air | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 131K | 131K | Tie |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $0.15 | $0.13 | 🏆 Z.ai: GLM 4.5 Air |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $0.60 | $0.85 | 🏆 OpenAI: gpt-oss-120b (batch) |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | — | — | Tie |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is OpenAI: gpt-oss-120b (batch) better than Z.ai: GLM 4.5 Air?
OpenAI: gpt-oss-120b (batch) and Z.ai: GLM 4.5 Air are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
What's the price difference between OpenAI: gpt-oss-120b (batch) and Z.ai: GLM 4.5 Air?
Input: $0.15 vs $0.13 per 1M tokens. Output: $0.60 vs $0.85 per 1M tokens.
What context windows do OpenAI: gpt-oss-120b (batch) and Z.ai: GLM 4.5 Air support?
OpenAI: gpt-oss-120b (batch) supports up to 131K tokens. Z.ai: GLM 4.5 Air supports up to 131K tokens.
Do both OpenAI: gpt-oss-120b (batch) and Z.ai: GLM 4.5 Air support tool calling?
OpenAI: gpt-oss-120b (batch): yes. Z.ai: GLM 4.5 Air: yes.