Model comparison
Grok Build 0.1 vs Mercury 2.5
Grok Build 0.1 has enough public results to be ranked (#214); Mercury 2.5 does not yet, so treat this comparison as directional.
Last verified . 0 shared benchmarks.
Summary
- Mercury 2.5 is cheaper at $0.04 / $0.15 per million input/output tokens, against $1 / $2 for Grok Build 0.1.
- Mercury 2.5 accepts more context: 260K tokens versus 256K.
Side by side
| Grok Build 0.1 | Mercury 2.5 | |
|---|---|---|
| Provider | xAI | Inception |
| Noometry Index | 35.8 | 30.2 |
| Released | 2026-04-16 | 2026-09-08 |
| Weights | Proprietary | Proprietary |
| Context window | 256K | 260K |
| Max output | 256K | 66K |
| Input $ / M tokens | $1 | $0.04 |
| Output $ / M tokens | $2 | $0.15 |
| Results tracked | 3 | 2 |
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Category by category
Coding Not comparable
Grok Build 0.1: 42.5 (#90), Mercury 2.5: —
Agentic & Tool Use Not comparable
Grok Build 0.1: 22.5 (#122), Mercury 2.5: —
| Benchmark | Grok Build 0.1 | Mercury 2.5 |
|---|---|---|
| GBAEval | 2.4% | — |
Reasoning Not comparable
Grok Build 0.1: 31.3 (#73), Mercury 2.5: —
| Benchmark | Grok Build 0.1 | Mercury 2.5 |
|---|---|---|
| CritPt | 9.1% | — |
Math Not comparable
Grok Build 0.1: —, Mercury 2.5: 22.4
| Benchmark | Grok Build 0.1 | Mercury 2.5 |
|---|---|---|
| ProofBench | — | 3% |
Frequently asked questions
Is Grok Build 0.1 better than Mercury 2.5?
Grok Build 0.1 has enough public results to be ranked (#214); Mercury 2.5 does not yet, so treat this comparison as directional.
Which is cheaper, Grok Build 0.1 or Mercury 2.5?
Mercury 2.5 is cheaper. It lists at $0.04 per million input tokens and $0.15 per million output tokens; Grok Build 0.1 lists at $1 and $2.
Which has the bigger context window?
Mercury 2.5 does, with 260K tokens against 256K.
How many benchmarks do Grok Build 0.1 and Mercury 2.5 share?
0 benchmarks have published results for both models. Grok Build 0.1 has 3 scored results on Noometry and Mercury 2.5 has 2.