Model comparison
Granite 4.0 Micro vs Mercury 2.5
Mercury 2.5 is the stronger model overall, scoring 33.5 to 29.0 on the Noometry Index. Granite 4.0 Micro costs 1.7× less per token, which makes it the better buy when Mercury 2.5's lead doesn't matter for your workload.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in math, where Mercury 2.5 leads 23.3 to 12.0.
- Granite 4.0 Micro is cheaper at $0.017 / $0.11 per million input/output tokens, against $0.04 / $0.15 for Mercury 2.5.
- Mercury 2.5 accepts more context: 260K tokens versus 131K.
- Granite 4.0 Micro has downloadable open weights; the other is API-only.
Side by side
| Granite 4.0 Micro | Mercury 2.5 | |
|---|---|---|
| Provider | IBM | Inception |
| Noometry Index | 29.0 | 33.5 |
| Released | 2025-10-02 | 2026-09-08 |
| Weights | Open | Proprietary |
| Context window | 131K | 260K |
| Max output | 118K | 66K |
| Input $ / M tokens | $0.017 | $0.04 |
| Output $ / M tokens | $0.11 | $0.15 |
| Results tracked | 8 | 4 |
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Category by category
Coding Not comparable
Granite 4.0 Micro: —, Mercury 2.5: 39.5 (#156)
Reasoning Mercury 2.5 leads
Granite 4.0 Micro: 19.2 (#265), Mercury 2.5: 22.4 (#193)
| Benchmark | Granite 4.0 Micro | Mercury 2.5 |
|---|---|---|
| CritPt | — | 0% |
| Chess Puzzles | 0% | — |
Math Mercury 2.5 leads
Granite 4.0 Micro: 12.0 (#307), Mercury 2.5: 23.3 (#272)
| Benchmark | Granite 4.0 Micro | Mercury 2.5 |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 2.8% | — |
| ProofBench | — | 3% |
| Omni-MATH | 20.9% | — |
Knowledge Not comparable
Granite 4.0 Micro: 9.9 (#304), Mercury 2.5: —
| Benchmark | Granite 4.0 Micro | Mercury 2.5 |
|---|---|---|
| GPQA Diamond | 28.3% | — |
| MMLU-Pro | 39.5% | — |
| GPQA (HELM) | 30.7% | — |
Instruction Following Not comparable
Granite 4.0 Micro: 69.9 (#169), Mercury 2.5: —
| Benchmark | Granite 4.0 Micro | Mercury 2.5 |
|---|---|---|
| IFEval | 84.9% | — |
Writing & Preference Not comparable
Granite 4.0 Micro: 46.7 (#216), Mercury 2.5: —
| Benchmark | Granite 4.0 Micro | Mercury 2.5 |
|---|---|---|
| WildBench | 67% | — |
Frequently asked questions
Is Granite 4.0 Micro better than Mercury 2.5?
Mercury 2.5 is the stronger model overall, scoring 33.5 to 29.0 on the Noometry Index. Granite 4.0 Micro costs 1.7× less per token, which makes it the better buy when Mercury 2.5's lead doesn't matter for your workload.
Which is cheaper, Granite 4.0 Micro or Mercury 2.5?
Granite 4.0 Micro is cheaper. It lists at $0.017 per million input tokens and $0.11 per million output tokens; Mercury 2.5 lists at $0.04 and $0.15.
Which has the bigger context window?
Mercury 2.5 does, with 260K tokens against 131K.
How many benchmarks do Granite 4.0 Micro and Mercury 2.5 share?
0 benchmarks have published results for both models. Granite 4.0 Micro has 8 scored results on Noometry and Mercury 2.5 has 4.