Model by Inception AI. A diffusion large language model that runs incredibly quickly (500+ tokens/second) while matching Claude 3.5 Haiku and GPT-4o-mini. 1st in speed on Copilot arena, and matching 2nd in quality.
Mercury Coder Small by inception is offered by 2 providers on this page. Its reference price is $0.25 per 1M input tokens and $1.00 per 1M output tokens.
The context window is 32,000 tokens at the reference host, but hosts report different limits, from 32,000 to 32,768, so the usable window depends on the provider you pick. Providers report the capability flags inconsistently, so verify a specific feature against the host you plan to use.
| Provider | Tier | Input | Output | Cache read | Cache write | Context | Output limit | Status |
|---|---|---|---|---|---|---|---|---|
| NanoGPT | Gateway | $0.25 | $1.00 | $0.13 | — | 32,768 ⚠ | 16,384 | |
| Vercel AI Gateway | Cloud | $0.25 | $1.00 | — | — | 32,000 | 16,384 |
Sorted by blended price (input×0.75 + output×0.25) asc. The official channel always shows regardless of rank. Whether a gateway's low price is actually usable can't be verified.