MODEL PROOF
Mercury 2.5
NOT INDEPENDENTLY RATED
No independent LMArena score is published for this model.
- Independent LMArena score
- Not independently rated
- Context window
- 260K
- Maximum output
- 65.54K
- Input modalities
- text
- Output modalities
- text
- Published input price
- $0.040 / 1M tokens
- Published output price
- $0.150 / 1M tokens
- Pricing kind
- fixed
Inspect complete billing conditions and endpoint terms below.
Every price dimension · USD per million tokens
| Input | $0.040/M |
|---|---|
| Output | $0.150/M |
| Cached input | $0.0040/M |
| Cache write | Unknown/M |
| Cache write 1h | Unknown/M |
| Reasoning | Unknown/M |
Who sells it
The same weights, different shops. Cheapest is not like-for-like when serving precision differs.
1 provider offers · rates, limits and conditions
Rates are USD per million tokens. Endpoint terms can differ even when the quoted price and precision match. A listed parameter is a provider declaration, not a task-success test.
| Seller | Input | Output | Precision | Uptime (1d) |
|---|---|---|---|---|
| Inceptioninception Endpoint terms
| $0.040 | $0.150 | undeclared | 99.97% |
Independent scores
No independent benchmark has measured this model. Unrated is not a score of zero.
Capability
| Context window | 260K |
|---|---|
| Max output | 66K |
| Input modes | text |
| Tool use | yes |
| Reasoning | optional |
| Open weights | Unknown |
Provenance
| Price source | openrouter.ai |
|---|---|
| Fetched | 2026-09-23 |
| Quality data | unrated |
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...
Questions this page answers
What does Mercury 2.5 cost?
$0.040/M in, $0.150/M out in this catalogue, as of the fetch date on this page. That is the API row, not a subscription.
Does Mercury 2.5 have an independent quality score?
Mercury 2.5 has no independent quality score in this catalogue. Unrated is not a score of zero.
What beats Mercury 2.5?
Mercury 2.5 has no independent quality score. Unrated is not a score of zero.
Does this page use Artificial Analysis scores for Mercury 2.5?
No. Artificial Analysis figures are not published here. Quality on this page is LMArena Elo where a score exists; otherwise the row is unrated.
Does a missing score mean Mercury 2.5 scored zero?
Unrated is not a score of zero.
MODEL MONUMENT
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The verdict as one SVG, for a README or a docs page. It states this model's dominance status at the balanced workload on the LMArena lens, with the date it was computed, and it is rebuilt with the catalogue — so it changes when the verdict changes, including to one you would rather it did not.
[](https://undominated.ai/models/inception__mercury-2.5/)<a href="https://undominated.ai/models/inception__mercury-2.5/"><img src="https://undominated.ai/badge/inception__mercury-2.5.svg" alt="Mercury 2.5 — Undominated.ai dominance verdict" height="36"></a>Direct file: https://undominated.ai/badge/inception__mercury-2.5.svg — a static SVG, written by scripts/build-badges.mjs on every build, so the copy you embed is never
older than the last deploy.
