GPT-OSS 120B vs GLM 5.3
openai/gpt-oss-120b · z-ai/glm-5.3
As of October 31, 2026, GPT-OSS 120B is the cheaper API on UberLLM: $0.0001 per million input tokens and $0.0006 per million output, versus $0.0022 / $0.0448 for GLM 5.3, about 99% less when output is 3 tokens for every input token. These are the median prices buyers paid over the last 24 hours. Both work with one OpenAI-compatible key and UberLLM adds no fee. Choose GPT-OSS 120B to cut cost; choose GLM 5.3 when context size wins. GLM 5.3 carries the larger context window (1,000,000 vs 128,000 tokens), which can matter for long-document work.
GPT-OSS 120B vs GLM 5.3, side by side
| Spec | GPT-OSS 120B | GLM 5.3 |
|---|---|---|
| Price · input / 1M | $0.0001 | $0.0022 |
| Price · output / 1M | $0.0006 | $0.0448 |
| Context length | 128,000 | 1,000,000 |
| Max output tokens | 16,384 | 131,072 |
| Input modalities | text | text |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Reasoning | — | Yes |
| % off list | 99.8% off | 97% off |
| First token, median (7 days) | — | 3.5 s (156 requests) |
Median prices buyers paid on UberLLM over the last 24 hours. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated October 31, 2026. A price more than 70% below list is what buyers were billed, not an error. Why so cheap?
GPT-OSS 120B vs GLM 5.3 — FAQ
Is GPT-OSS 120B or GLM 5.3 cheaper?
GPT-OSS 120B is cheaper on a blended token mix, by about 99%. A request costs what its provider charged, UberLLM adds no fee, and every request is listed with its cost in Activity.
What's the price difference between GPT-OSS 120B and GLM 5.3?
GPT-OSS 120B: $0.0001 in / $0.0006 out per 1M tokens. GLM 5.3: $0.0022 in / $0.0448 out per 1M tokens. That's roughly a 99% blended difference. Prices are live; UberLLM adds no fee.
Can I use both GPT-OSS 120B and GLM 5.3 with one API?
Yes. Both are served through a single OpenAI-compatible endpoint — set the base URL to https://api.uberllm.dev/v1 and your UberLLM key, then switch between them by changing the model id. Anthropic SDKs work via https://api.uberllm.dev/v1/messages.