Model comparison
Mercury 2.5 vs Yi-34B
Mercury 2.5 is the stronger model overall, scoring 33.5 to 27.8 on the Noometry Index.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in coding, where Mercury 2.5 leads 39.5 to 32.3.
- Yi-34B has downloadable open weights; the other is API-only.
Side by side
| Mercury 2.5 | Yi-34B | |
|---|---|---|
| Provider | Inception | 01.AI |
| Noometry Index | 33.5 | 27.8 |
| Released | 2026-09-08 | 2023-11-02 |
| Weights | Proprietary | Open |
| Context window | 260K | — |
| Max output | 66K | — |
| Input $ / M tokens | $0.04 | — |
| Output $ / M tokens | $0.15 | — |
| Results tracked | 4 | 23 |
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Category by category
Coding Mercury 2.5 leads
Mercury 2.5: 39.5 (#156), Yi-34B: 32.3 (#274)
| Benchmark | Mercury 2.5 | Yi-34B |
|---|---|---|
| SciCode | 38.5% | — |
| LMArena Coding | — | 1112 |
| ALE-Bench | 301.65 | — |
Reasoning Mercury 2.5 leads
Mercury 2.5: 22.4 (#193), Yi-34B: 21.2 (#226)
| Benchmark | Mercury 2.5 | Yi-34B |
|---|---|---|
| CritPt | 0% | — |
| LMArena Hard Prompts | — | 1104 |
| BIG-Bench Hard | — | 71.7% |
| Epoch Capabilities Index | — | 117.39 |
Math Mercury 2.5 leads
Mercury 2.5: 23.3 (#272), Yi-34B: 21.6 (#282)
| Benchmark | Mercury 2.5 | Yi-34B |
|---|---|---|
| ProofBench | 3% | — |
| LMArena Math | — | 1114 |
| MATH Level 5 | — | 5.1% |
| GSM8K | — | 76% |
Knowledge Not comparable
Mercury 2.5: —, Yi-34B: 7.5 (#309)
| Benchmark | Mercury 2.5 | Yi-34B |
|---|---|---|
| GPQA Diamond | — | 14.7% |
| LMArena Expert | — | 1061 |
| MMLU | — | 76.3% |
Multilingual Not comparable
Mercury 2.5: —, Yi-34B: 29.7 (#264)
| Benchmark | Mercury 2.5 | Yi-34B |
|---|---|---|
| LMArena Non-English | — | 1079 |
| LMArena Chinese | — | 1176 |
| LMArena French | — | 1081 |
| LMArena German | — | 1042 |
| LMArena Japanese | — | 993 |
| LMArena Korean | — | 959 |
| LMArena Russian | — | 1050 |
| LMArena Spanish | — | 1070 |
Instruction Following Not comparable
Mercury 2.5: —, Yi-34B: 56.2 (#274)
| Benchmark | Mercury 2.5 | Yi-34B |
|---|---|---|
| LMArena Instruction Following | — | 1091 |
Long Context Not comparable
Mercury 2.5: —, Yi-34B: 33.2 (#264)
| Benchmark | Mercury 2.5 | Yi-34B |
|---|---|---|
| LMArena Longer Query | — | 1094 |
Writing & Preference Not comparable
Mercury 2.5: —, Yi-34B: 34.1 (#273)
| Benchmark | Mercury 2.5 | Yi-34B |
|---|---|---|
| LMArena Text | — | 1129 |
| LMArena Creative Writing | — | 1108 |
| LMArena Multi-Turn | — | 1113 |
Frequently asked questions
Is Mercury 2.5 better than Yi-34B?
Mercury 2.5 is the stronger model overall, scoring 33.5 to 27.8 on the Noometry Index.
Is Mercury 2.5 or Yi-34B better for coding?
Mercury 2.5 scores higher on coding benchmarks: 39.5 versus 32.3 in the Noometry coding category.
How many benchmarks do Mercury 2.5 and Yi-34B share?
0 benchmarks have published results for both models. Mercury 2.5 has 4 scored results on Noometry and Yi-34B has 23.