Claude Fable 5.1 vs GLM 5.3 Flash
anthropic/claude-fable-5.1 · z-ai/glm-5.3-flash
As of November 2, 2026, GLM 5.3 Flash is the cheaper API on UberLLM: $0.0005 per million input tokens and $0.0015 per million output, versus $0.7250 / $3.63 for Claude Fable 5.1, about 100% 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 Flash to cut cost; choose Claude Fable 5.1 when its capabilities fit your task better.
Claude Fable 5.1 vs GLM 5.3 Flash, side by side
| Spec | Claude Fable 5.1 | GLM 5.3 Flash |
|---|---|---|
| Price · input / 1M | $0.7250 | $0.0005 |
| Price · output / 1M | $3.63 | $0.0015 |
| Context length | 1,000,000 | 1,048,576 |
| Max output tokens | 128,000 | 131,072 |
| Input modalities | text, image, file | text, image, video |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | Yes |
| Reasoning | Yes | Yes |
| % off list | 92.8% off | 98.4% off |
| First token, median (7 days) | — | 5.2 s (3,293 requests) |
Best prices on UberLLM right now. No UberLLM fee on requests; adding credit by card costs 5.5% + $0.50. Updated November 2, 2026. A price more than 70% below list is what buyers were billed, not an error. Why so cheap?
Claude Fable 5.1 vs GLM 5.3 Flash — FAQ
Is Claude Fable 5.1 or GLM 5.3 Flash cheaper?
GLM 5.3 Flash is cheaper on a blended token mix, by about 100%. 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 Fable 5.1 and GLM 5.3 Flash?
Claude Fable 5.1: $0.7250 in / $3.63 out per 1M tokens. GLM 5.3 Flash: $0.0005 in / $0.0015 out per 1M tokens. That's roughly a 100% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Claude Fable 5.1 and GLM 5.3 Flash 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.