Claude Opus 4.8 vs GLM 5.3
anthropic/claude-opus-4.8 · z-ai/glm-5.3
As of November 1, 2026, GLM 5.3 is the cheaper API on UberLLM: $0.0008 per million input tokens and $0.0140 per million output, versus $0.2485 / $1.24 for Claude Opus 4.8, about 99% less when output is 3 tokens for every input token. These are the best prices on the market right now. Both work with one OpenAI-compatible key and UberLLM adds no fee. Choose GLM 5.3 to cut cost; choose Claude Opus 4.8 when its capabilities fit your task better.
Claude Opus 4.8 vs GLM 5.3, side by side
| Spec | Claude Opus 4.8 | GLM 5.3 |
|---|---|---|
| Price · input / 1M | $0.2485 | $0.0008 |
| Price · output / 1M | $1.24 | $0.0140 |
| Context length | 1,000,000 | 1,000,000 |
| Max output tokens | 128,000 | 131,072 |
| Input modalities | text, image | text |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | — |
| Reasoning | Yes | Yes |
| % off list | 95% off | 99% off |
| First token, median (7 days) | — | 3.6 s (428 requests) |
Best prices on UberLLM right now. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated November 1, 2026. A price more than 70% below list is what buyers were billed, not an error. Why so cheap?
Claude Opus 4.8 vs GLM 5.3 — FAQ
Is Claude Opus 4.8 or GLM 5.3 cheaper?
GLM 5.3 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 Claude Opus 4.8 and GLM 5.3?
Claude Opus 4.8: $0.2485 in / $1.24 out per 1M tokens. GLM 5.3: $0.0008 in / $0.0140 out per 1M tokens. That's roughly a 99% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Claude Opus 4.8 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.