Model comparison
Mercury vs Mercury 2.5
Mercury has enough public results to be ranked (#192); Mercury 2.5 does not yet, so treat this comparison as directional.
Last verified . 0 shared benchmarks.
Side by side
| Mercury | Mercury 2.5 | |
|---|---|---|
| Provider | Inception | Inception |
| Noometry Index | 37.3 | 30.2 |
| Released | — | 2026-09-08 |
| Weights | Proprietary | Proprietary |
| Context window | — | 260K |
| Max output | — | 66K |
| Input $ / M tokens | — | $0.04 |
| Output $ / M tokens | — | $0.15 |
| Results tracked | 9 | 2 |
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Category by category
Coding Not comparable
Mercury: 38.1 (#164), Mercury 2.5: —
| Benchmark | Mercury | Mercury 2.5 |
|---|---|---|
| LMArena Coding | 1323 | — |
| ALE-Bench | — | 301.65 |
Reasoning Not comparable
Mercury: 16.8 (#288), Mercury 2.5: —
| Benchmark | Mercury | Mercury 2.5 |
|---|---|---|
| Kagi LLM Benchmark | 21.6% | — |
| LMArena Hard Prompts | 1284 | — |
Math Not comparable
Mercury: —, Mercury 2.5: 22.4
| Benchmark | Mercury | Mercury 2.5 |
|---|---|---|
| ProofBench | — | 3% |
Multilingual Not comparable
Mercury: 41.7 (#201), Mercury 2.5: —
| Benchmark | Mercury | Mercury 2.5 |
|---|---|---|
| LMArena Non-English | 1259 | — |
Instruction Following Not comparable
Mercury: 65.3 (#220), Mercury 2.5: —
| Benchmark | Mercury | Mercury 2.5 |
|---|---|---|
| LMArena Instruction Following | 1238 | — |
Long Context Not comparable
Mercury: 38.3 (#193), Mercury 2.5: —
| Benchmark | Mercury | Mercury 2.5 |
|---|---|---|
| LMArena Longer Query | 1264 | — |
Writing & Preference Not comparable
Mercury: 46.2 (#216), Mercury 2.5: —
| Benchmark | Mercury | Mercury 2.5 |
|---|---|---|
| LMArena Text | 1282 | — |
| LMArena Creative Writing | 1186 | — |
| LMArena Multi-Turn | 1283 | — |
Frequently asked questions
Is Mercury better than Mercury 2.5?
Mercury has enough public results to be ranked (#192); Mercury 2.5 does not yet, so treat this comparison as directional.
How many benchmarks do Mercury and Mercury 2.5 share?
0 benchmarks have published results for both models. Mercury has 9 scored results on Noometry and Mercury 2.5 has 2.