> ## Documentation Index
> Fetch the complete documentation index at: https://docs.venice.ai/llms.txt
> Use this file to discover all available pages before exploring further.

# Mercury 3 API

> Mercury 3 API on Venice: 1M context, $0.10 input and $0.35 output per 1M tokens. Anonymized access without your identity. Pricing, specs and code examples.

> [accordion] Plain-text specification
>
> ## Mercury 3 API
>
> Mercury 3 is a large language model by Inception, available on the Venice API as `mercury-3`. Requests are anonymized, so the provider never sees your identity.
>
> Mercury 3 is Inception's most capable diffusion-based reasoning model, generating over 1,000 tokens per second with a 1M-token context window, tunable reasoning, tool calling, and structured output support.
>
> ### Mercury 3 API pricing
>
> | Model ID | Variant | Privacy | Price |
> | - | - | - | - |
> | `mercury-3` | Standard | Anonymized | $0.10 / $0.35 per 1M |
>
> ### Mercury 3 specifications
>
> | Spec | Value |
> | - | - |
> | Provider | Inception |
> | Released | Oct 19, 2026 |
> | Privacy | Anonymized |
> | Status | Stable |
> | Context window | 1M tokens |
> | Max output | 128K tokens |
> | Reasoning effort | none, low, medium, high |
>
> ### How to use the Mercury 3 API
>
> Send requests to `POST https://api.venice.ai/api/v1/chat/completions` with `"model": "mercury-3"` and your API key.
>
> ```bash theme={"system"}
> curl https://api.venice.ai/api/v1/chat/completions \
>   -H "Authorization: Bearer $VENICE_API_KEY" \
>   -H "Content-Type: application/json" \
>   -d '{
>     "model": "mercury-3",
>     "messages": [{ "role": "user", "content": "Explain TEE attestation in two sentences." }],
>     "reasoning_effort": "high"
>   }'
> ```
>
> ### Related models
>
> * [Mercury 2.5 API](https://docs.venice.ai/models/mercury-2-5.md): $0.25 / $0.9375 per 1M
> * [Mercury 2 API](https://docs.venice.ai/models/mercury-2.md): $0.3125 / $0.9375 per 1M
> * [DeepSeek V4 Flash 0731 API](https://docs.venice.ai/models/deepseek-v4-flash-0731.md): $0.13 / $0.26 per 1M
> * [Claude Haiku 5.5 API](https://docs.venice.ai/models/claude-haiku-5-5.md): $0.10 / $0.50 per 1M
> * [GPT-6 Luna API](https://docs.venice.ai/models/gpt-6-luna.md): $0.10 / $0.50 per 1M
> * [DeepSeek V4 Flash 0423 API](https://docs.venice.ai/models/deepseek-v4-flash-0423.md): $0.138 / $0.275 per 1M


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