How much does Mercury 3 cost?

On the Respan gateway, Mercury 3 costs $0.10 per 1M input tokens and $0.35 per 1M output tokens on OpenRouter, after gateway discounts.

Which providers serve Mercury 3 on Respan?

Mercury 3 is served by OpenRouter.

What is Mercury 3's context window?

Mercury 3 accepts up to 1M tokens of context.

How do I use Mercury 3 with the Respan gateway?

Point any OpenAI-compatible SDK at https://api.respan.ai/api/ with your Respan API key and set the model to "mercury-3". To set it up with a coding agent, copy the agent setup prompt at the top of this page.

Mercury 3

Mercury 3 is a diffusion-based language model from Inception, and the lab's most capable model to date. It is suited for agentic workflows and real-time applications where latency compounds, such...

Input / output price: $0.10 / $0.35 per 1M
Weekly tokens / requests: 997.9K / 34
Context: 1M tokens
Released: Oct 16, 2026

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Agent setup

Paste into Claude Code, Cursor, or Codex

Help me set up the Respan gateway: fetch and follow https://www.respan.ai/docs/agent-setup.md. Use model "mercury-3".

from openai import OpenAI

client = OpenAI(

    base_url="https://api.respan.ai/api/",

    api_key="YOUR_RESPAN_API_KEY",

)

response = client.chat.completions.create(

    model="mercury-3",

    messages=[{"role": "user", "content": "Hello!"}],

)

print(response.choices[0].message.content)

import OpenAI from "openai";

const client = new OpenAI({

  baseURL: "https://api.respan.ai/api/",

  apiKey: "YOUR_RESPAN_API_KEY",

});

const response = await client.chat.completions.create({

  model: "mercury-3",

  messages: [{ role: "user", content: "Hello!" }],

});

console.log(response.choices[0].message.content);

curl https://api.respan.ai/api/chat/completions \

  -H "Authorization: Bearer YOUR_RESPAN_API_KEY" \

  -H "Content-Type: application/json" \

  -d '{

    "model": "mercury-3",

    "messages": [{"role": "user", "content": "Hello!"}]

}'

Read docs

Providers

One provider serves this model, priced per 1M tokens after gateway discounts.

Provider	Context	Input	Output	Cache read	Capabilities
OpenRouter`openrouter/inception/mercury-3`	1M	$0.10/M	$0.35/M	$0.01/M	+2

Is a provider down? OpenRouter status

Pricing

USD per 1M tokens on OpenRouter, after gateway discounts.

Input: $0.10 per 1M
Output: $0.35 per 1M
Cache read: $0.01 per 1M

Cost by volume

Total cost from 0 to 1T tokens.

$0.10/MOpenRouter

Throughput and latency

30-day averages from requests through the Respan gateway. Under each figure, every model on the gateway by its average, this one in blue.

Output speed

Higher is better

211tokens/sacross providers

Faster than 94% of the other 486 models on the gateway

Response latency

Lower is better

4.6sacross providers

Faster than 29% of the other 504 models on the gateway

Apps

Use Mercury 3 in the tools you already run. Each guide points the app at the Respan gateway.

Setup guides for more apps are in the integration docs.

Mercury 3 FAQ

Short answers, built from the data on this page.

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