Claude Opus 5.5 vs GLM 5.1
anthropic/claude-opus-5.5 · z-ai/glm-5.1
As of October 31, 2026, GLM 5.1 is the cheaper API on UberLLM: $0.0693 per million input tokens and $0.2178 per million output, versus $1.59 / $7.95 for Claude Opus 5.5, about 97% 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 GLM 5.1 to cut cost; choose Claude Opus 5.5 when context size wins. Claude Opus 5.5 carries the larger context window (1,000,000 vs 200,000 tokens), which can matter for long-document work.
Claude Opus 5.5 vs GLM 5.1, side by side
| Spec | Claude Opus 5.5 | GLM 5.1 |
|---|---|---|
| Price · input / 1M | $1.59 | $0.0693 |
| Price · output / 1M | $7.95 | $0.2178 |
| Context length | 1,000,000 | 200,000 |
| Max output tokens | 128,000 | 24,000 |
| Input modalities | text, image, file | text |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | — |
| Reasoning | Yes | Yes |
| % off list | 60% off | 95% off |
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?
Claude Opus 5.5 vs GLM 5.1 — FAQ
Is Claude Opus 5.5 or GLM 5.1 cheaper?
GLM 5.1 is cheaper on a blended token mix, by about 97%. 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 Claude Opus 5.5 and GLM 5.1?
Claude Opus 5.5: $1.59 in / $7.95 out per 1M tokens. GLM 5.1: $0.0693 in / $0.2178 out per 1M tokens. That's roughly a 97% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Claude Opus 5.5 and GLM 5.1 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.