Mercury 3 API
Other·Text
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...
Pricing
Cheapest live price, per 1 million tokens.
Input / 1M tokens
$0.100 OpenRouter
Output / 1M tokens
$0.350 OpenRouter
Cache read / 1M
Repeated prompt prefixes
Cache read is the discounted rate for repeated prompt prefixes (system prompts, agent context).
Capabilities · 6
Specifications
- Context window
- 1M
- Max output
- 131K
- Type
- Text
- Creator
- Other
- Live sellers
- 4
- Requests / 24h
- 266
Price history · 60 days
Estimated monthly cost
30 days at the cheapest live price.
Quick start
OpenAI-compatible — change the base URL and key. Get a key from the dashboard.
from openai import OpenAI
client = OpenAI(
base_url="https://api.qubax.ai/v1",
api_key="YOUR_QUBAX_API_KEY",
)
response = client.chat.completions.create(
model="mercury-3",
messages=[{"role": "user", "content": "Hello!"}],
)
print(response.choices[0].message.content)About Mercury 3
Mercury 3 is a language model developed by Other. It's particularly well-suited for tackling complex, multi-step reasoning problems, orchestrating tool-using agents that call APIs and external services, producing structured outputs for reliable data extraction and handling large contexts of up to 1M tokens. Its 1M-token context window means you can pass in entire documents, codebases, or conversation histories without losing context. It can write up to 131K tokens in a single response.
As of Oct 25, 2026, Mercury 3 costs $0.075 per 1M input tokens and $0.263 per 1M output tokens on Qubax, versus $0.100 / $0.350 on OpenRouter (25% less on input). A typical 1,000 chat requests (2K tokens in, 500 out) come to about $0.28. 4 independent compute providers currently serve it, so requests fail over automatically. It handled 266 requests on Qubax in the last 24 hours. Pay with USDC, USDT, BTC, ETH or 350+ other coins — no credit card required.
Similar-priced alternatives
Frequently asked questions
How much does the Mercury 3 API cost?
On Qubax, Mercury 3 costs $0.075 per 1M input tokens and $0.263 per 1M output tokens. This is 25% cheaper than OpenRouter's price of $0.100 per 1M input tokens.
Is the Mercury 3 API compatible with OpenAI?
Yes. Qubax provides an OpenAI-compatible API. You can use Mercury 3 as a drop-in replacement by changing your base URL to https://api.qubax.ai/v1 and using your Qubax API key. It works with Cline, Cursor, OpenCode, Hermes Agent, and any tool that supports OpenAI APIs.
Why is Mercury 3 cheaper on Qubax than OpenRouter?
Qubax sources AI inference from an open compute marketplace on the Base blockchain where GPU providers compete on price. We pass the savings to you — 25% cheaper than OpenRouter's price for Mercury 3.
How do I pay for Mercury 3 API usage?
Qubax uses prepaid crypto credits. Top up with USDC, USDT, BTC, ETH, SOL or 350+ other coins and your balance is deducted as you use the API. No credit card or KYC required.
What is the context window of Mercury 3?
Mercury 3 supports a context window of 1M tokens, allowing you to process large documents, codebases, or long conversations in a single request.
What can I build with Mercury 3?
You can use Mercury 3 to tackle complex multi-step reasoning tasks, build autonomous agents that call external tools and APIs, generate structured JSON output for data pipelines and process long documents and entire codebases. Because it's served through Qubax's OpenAI-compatible API, integration into existing apps, agents, or workflows takes just a few lines of code.
How fast and reliable is Mercury 3 on Qubax?
Responses stream token by token. 4 providers serve it, so if one is slow or down the request moves to the next.
Mercury 3 vs Meta: Muse Spark 1.2 Contributor: which should I choose?
Mercury 3 by Other and Meta: Muse Spark 1.2 Contributor by Meta are both strong models in a similar price tier. Mercury 3 excels at complex reasoning. Meta: Muse Spark 1.2 Contributor comes from a different lab and may have different strengths depending on your workload. On Qubax, Mercury 3 starts at $0.075/1M input tokens versus Meta: Muse Spark 1.2 Contributor's $0.075/1M — making Mercury 3 the more cost-effective option for high-volume workloads. Both are available on Qubax with crypto payments and OpenAI-compatible APIs, so you can try each and switch freely.
Can I use Mercury 3 for commercial projects?
Yes. Mercury 3 on Qubax can be used for commercial purposes. You own the outputs you generate. Qubax provides the API infrastructure — you bring your use case.
Why use Mercury 3 on Qubax?
25% cheaper
Providers compete on price — you get the cheapest healthy seller.
Pay with crypto
350+ coins (BTC, ETH, SOL, USDT, USDC). No card, no KYC.
OpenAI & Anthropic compatible
Drop-in base URL. Works with Cline, Cursor, Claude Code, OpenAI and Anthropic SDKs.
