Updated daily at 05:00 UTC
- Released
- 24 Feb 2026
- Status
- Legacy
- Context
- 128K
- Max output
- 50K
- Input per 1M tokens
- $0.25
- Output per 1M tokens
- $0.75
- Open weights
- No
- License
- proprietary
- Parameters
- —
- Knowledge cutoff
- Jan 2025
- Reasoning
- Yes
- Modalities
- text → text
Category scores
Out of 100, from independent and third-party results only, by method category-2026-09-29.1.
| Category | Score | Rank | Coverage |
|---|---|---|---|
| Human preference | 31.5 | Not ranked | 2 of 5 |
Benchmark results
Every result we hold for this model, with who ran it and where it was published.
Coding & software engineering
| Benchmark | Metric | Value | Provenance | Setting | Evaluated | Source |
|---|---|---|---|---|---|---|
| WeirdML (v2) | Average accuracy | 43.2% | Third party | — | — | https://htihle.github.io/weirdml.html via Epoch AI |
Human preference
| Benchmark | Metric | Value | Provenance | Setting | Evaluated | Source |
|---|---|---|---|---|---|---|
| Code Arena: WebDev (arena.ai) | Arena score (Elo scale) | 1170 | Independent | — | 25 Sep 2026 | Arena |
| Code Arena: WebDev (arena.ai) | Votes | 955 | Independent | — | 25 Sep 2026 | Arena |
| Text Arena (arena.ai) | Arena score (Elo scale) | 1343 | Independent | — | 25 Sep 2026 | Arena |
| Text Arena (arena.ai) | Votes | 3200 | Independent | — | 25 Sep 2026 | Arena |
Other Mercury versions
- Mercury 2.58 Sep 2026
- Mercury26 Jun 2025