Inception: Mercury 2.5 Preview✓ Catalog verified
Mercury 2.5 is the fastest reasoning LLM, and the latest diffusion LLM (dLLM) from Inception. Instead of generating tokens sequentially, Mercury 2.5 produces and refines multiple tokens in parallel, achieving...
Overview
Mercury 2.5 is the fastest reasoning LLM, and the latest diffusion LLM (dLLM) from Inception. Instead of generating tokens sequentially, Mercury 2.5 produces and refines multiple tokens in parallel, achieving...
Access: available through the official Inception API. Context window: 260K.
Specifications
| API identifier | inception/mercury-2.5-preview |
| Provider | Inception |
| Model type | Text LLM |
| Context window | 260K catalog |
| Input modalities | text |
| Output modalities | text |
| Released | Aug 31, 2026 |
| Moderated | No |
| Architecture modality | text->text |
Pricing
Live pricing components for inception/mercury-2.5-preview as published in the catalog.
| Pricing component | Raw unit price | Normalized | Unit |
|---|---|---|---|
| Prompt tokens | $4e-8 | $0.04 / 1M | Per input token |
| Completion tokens | $1.5e-7 | $0.15 / 1M | Per output token |
| Request fee | N/A | N/A | Per request |
| Image fee | N/A | N/A | Per image unit |
| Web search fee | N/A | N/A | Per search request |
Cost calculator
Estimate monthly spend from your own token volumes.
Estimated Total Cost
$0.05Calculated from current list pricing in the ModelsAtlas catalog.Capabilities
| Capability | Status | What it means |
|---|---|---|
| Visual Understanding | Not advertised | Image and document analysis support |
| Audio Processing | Not advertised | Speech and voice aligned flows |
| Tool Calling | ✓ Supported | Supports tools / function calling |
| Self-Hosting | Not advertised | Deploy outside managed APIs |
Capability signals
Directional signals derived from model metadata and capability tags — not official benchmark submissions.
Quick start
Call Inception: Mercury 2.5 Preview through an OpenAI-compatible client.
from openai import OpenAI
client = OpenAI(
base_url="https://openrouter.ai/api/v1",
api_key="YOUR_API_KEY"
)
response = client.chat.completions.create(
model="inception/mercury-2.5-preview",
messages=[{"role": "user", "content": "Explain quantum physics."}]
)
print(response.choices[0].message.content)Alternatives
Closest models by context window from a different provider.
| Model | Provider | Context | Input /1M | Actions |
|---|---|---|---|---|
| Qwen: Qwen3 Coder 480B A35B (free) | Qwen | 262K | $0.00 | View → |
| Arcee AI: Trinity Large Thinking | Arcee Ai | 262K | $0.25 | View → |
Sources & attribution
Pricing and metadata are maintained in the ModelsAtlas catalog.
Frequently asked questions
How much does Inception: Mercury 2.5 Preview cost?
$0.04 per 1M input tokens and $0.15 per 1M output tokens on the official Inception API.
What is the context window of Inception: Mercury 2.5 Preview?
Inception: Mercury 2.5 Preview supports up to 260K tokens of context.
Does Inception: Mercury 2.5 Preview support tool / function calling?
Yes, Inception: Mercury 2.5 Preview supports tool / function calling — you can register tools and the model will emit structured tool calls.
How do I access Inception: Mercury 2.5 Preview?
Use the official Inception API with the model id `inception/mercury-2.5-preview`. See the Quick start section above for code examples.