MODEL PROOF
Mercury 2
BETTER VALUE OPTION
A stored alternative has an equal-or-higher measured score and an equal-or-lower price.
GLM 5.3 Flash · Δ score 114.4 points · 37% lower measured price · $0.238 / 1M tokens
Gemma 4 31B is a further stored option with these losses: 50K → 16K max output
- Independent LMArena score
- 1,355.2 ± 10.35 · 3,197 votes
- Context window
- 128K
- Maximum output
- 50K
- Input modalities
- text
- Output modalities
- text
- Published input price
- $0.250 / 1M tokens
- Published output price
- $0.750 / 1M tokens
- Pricing kind
- fixed
Inspect complete billing conditions and endpoint terms below.
Price from Inception: the cheapest offer that is serving, at standard delivery and at the maker’s precision or better, at its standard rate.
Every price dimension · USD per million tokens
| Input | $0.250/M |
|---|---|
| Output | $0.750/M |
| Cached input | $0.025/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
| $0.250 | $0.750 | undeclared | 99.98% |
Independent scores
| LMArena Elo | 1355.2default |
|---|
LMArena Elo under CC BY 4.0. Absence of another board is not a score of zero.
Best rankings by task
- ASCII art #69 999
- SVG #83 996
- 3D #106 987
- Data visualisation #107 1016
- UI components #108 1001
- Code categories #111 1023
- Game development #112 999
- Websites #113 1037
Per-task Elo and rank from Design Arena, via OpenRouter’s model feed. The rank is the feed’s, and it counts models OpenRouter does not list.
Capability
| Context window | 128K |
|---|---|
| Max output | 50K |
| Input modes | text |
| Tool use | yes |
| Reasoning | optional |
| Open weights | Unknown |
Provenance
| Price source | openrouter.ai |
|---|---|
| Fetched | 2026-10-06 |
| Quality data | verified |
Mercury 2 is an extremely fast reasoning LLM, and the first reasoning diffusion LLM (dLLM). Instead of generating tokens sequentially, Mercury 2 produces and refines multiple tokens in parallel, achieving...
Questions this page answers
What does Mercury 2 cost?
$0.250/M in, $0.750/M out in this catalogue, as of the fetch date on this page. That is the API row, not a subscription.
Does Mercury 2 have an independent quality score?
Mercury 2 has an LMArena score in this catalogue.
What beats Mercury 2?
GLM 5.3 Flash has an equal-or-higher measured score and an equal-or-lower price.
Does this page use Artificial Analysis scores for Mercury 2?
No. Artificial Analysis figures are not published here. Quality on this page is LMArena Elo where a score exists; otherwise the row is unrated.
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/)<a href="https://undominated.ai/models/inception__mercury-2/"><img src="https://undominated.ai/badge/inception__mercury-2.svg" alt="Mercury 2 — Undominated.ai dominance verdict" height="36"></a>Direct file: https://undominated.ai/badge/inception__mercury-2.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.
