Claude Sonnet 5 vs MoonshotAI: Kimi K3.1 Pro
anthropic/claude-sonnet-5 · moonshotai/kimi-k3.1-pro
As of October 31, 2026, MoonshotAI: Kimi K3.1 Pro is the cheaper API on UberLLM: $0.3740 per million input tokens and $1.87 per million output, versus $0.6600 / $3.30 for Claude Sonnet 5, about 43% 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 MoonshotAI: Kimi K3.1 Pro to cut cost; choose Claude Sonnet 5 when its capabilities fit your task better.
Claude Sonnet 5 vs MoonshotAI: Kimi K3.1 Pro, side by side
| Spec | Claude Sonnet 5 | MoonshotAI: Kimi K3.1 Pro |
|---|---|---|
| Price · input / 1M | $0.6600 | $0.3740 |
| Price · output / 1M | $3.30 | $1.87 |
| Context length | 1,000,000 | 1,048,576 |
| Max output tokens | 64,000 | 943,718 |
| Input modalities | text, image | text, image, video |
| Output modalities | text | text |
| Tools / functions | Yes | Yes |
| Vision (image input) | Yes | Yes |
| Reasoning | Yes | Yes |
| % off list | 67% off | 81% off |
| First token, median (7 days) | — | 8.3 s (503 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?
Claude Sonnet 5 vs MoonshotAI: Kimi K3.1 Pro — FAQ
Is Claude Sonnet 5 or MoonshotAI: Kimi K3.1 Pro cheaper?
MoonshotAI: Kimi K3.1 Pro is cheaper on a blended token mix, by about 43%. 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 Sonnet 5 and MoonshotAI: Kimi K3.1 Pro?
Claude Sonnet 5: $0.6600 in / $3.30 out per 1M tokens. MoonshotAI: Kimi K3.1 Pro: $0.3740 in / $1.87 out per 1M tokens. That's roughly a 43% blended difference. Prices are live; UberLLM adds no fee.
Can I use both Claude Sonnet 5 and MoonshotAI: Kimi K3.1 Pro 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.