Model comparison
Gemini 3.8 Flash vs Grok Build 0.1
Gemini 3.8 Flash is the stronger model overall, scoring 61.8 to 36.4 on the Noometry Index.
Last verified . 2 shared benchmarks.
GoogleSummary
- They share 2 benchmarks with published results for both. Gemini 3.8 Flash scores higher in 3 categories and Grok Build 0.1 in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where Gemini 3.8 Flash leads 76.9 to 32.2.
- The biggest single-benchmark swing is CritPt: 18.3% for Gemini 3.8 Flash and 9.1% for Grok Build 0.1.
- Grok Build 0.1 is cheaper at $1 / $2 per million input/output tokens, against $0.75 / $3.75 for Gemini 3.8 Flash.
- Gemini 3.8 Flash accepts more context: 1.05M tokens versus 256K.
Side by side
| Gemini 3.8 Flash | Grok Build 0.1 | |
|---|---|---|
| Provider | xAI | |
| Noometry Index | 61.8 | 36.4 |
| Released | 2026-09-02 | 2026-04-16 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | 256K |
| Max output | 66K | 256K |
| Input $ / M tokens | $0.75 | $1 |
| Output $ / M tokens | $3.75 | $2 |
| Results tracked | 50 | 3 |
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Category by category
Coding Gemini 3.8 Flash leads
Gemini 3.8 Flash: 59.2 (#15), Grok Build 0.1: 43.1 (#91)
| Benchmark | Gemini 3.8 Flash | Grok Build 0.1 |
|---|---|---|
| SciCode | 56.6% | 50.2% |
| DeepSWE | 73.8% | — |
| FrontierCode | 41.2% | — |
| CursorBench | 39.6% | — |
| LMArena WebDev | 1584 | — |
| FrontierSWE | 19.6% | — |
| WeirdML | 84.8% | — |
| LMArena Coding | 1510 | — |
| ALE-Bench | 1,270 | — |
Agentic & Tool Use Gemini 3.8 Flash leads
Gemini 3.8 Flash: 41.8 (#21), Grok Build 0.1: 22.7 (#129)
| Benchmark | Gemini 3.8 Flash | Grok Build 0.1 |
|---|---|---|
| APEX-Agents | 64.3% | — |
| Remote Labor Index | 5.8% | — |
| GBAEval | — | 2.4% |
| GDP.pdf | 23.4% | — |
| Vending-Bench 2 | 5,094 | — |
Reasoning Gemini 3.8 Flash leads
Gemini 3.8 Flash: 76.9 (#5), Grok Build 0.1: 32.2 (#77)
| Benchmark | Gemini 3.8 Flash | Grok Build 0.1 |
|---|---|---|
| CritPt | 18.3% | 9.1% |
| ARC-AGI-2 | 89.2% | — |
| NYT Connections (extended) | 97.4% | — |
| ARC-AGI-1 | 98.5% | — |
| Chess Puzzles | 61% | — |
| LMArena Hard Prompts | 1508 | — |
| Mystery Game Puzzles | 47% | — |
| DTBench | 95.7% | — |
| LMCA | 52.9% | — |
| Surface Evolver Bench | 76.9% | — |
| Epoch Capabilities Index | 156.71 | — |
Math Not comparable
Gemini 3.8 Flash: 65.3 (#28), Grok Build 0.1: —
| Benchmark | Gemini 3.8 Flash | Grok Build 0.1 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 68.4% | — |
| FrontierMath Tier 4 | 22% | — |
| OTIS Mock AIME 2024-2025 | 98.9% | — |
| ProofBench | 48% | — |
| LMArena Math | 1528 | — |
Knowledge Not comparable
Gemini 3.8 Flash: 74.8 (#2), Grok Build 0.1: —
| Benchmark | Gemini 3.8 Flash | Grok Build 0.1 |
|---|---|---|
| GPQA Diamond | 95.4% | — |
| Humanity's Last Exam | 44.5% | — |
| SimpleQA Verified | 69.7% | — |
| LMArena Expert | 1524 | — |
Multimodal Not comparable
Gemini 3.8 Flash: 40.7 (#45), Grok Build 0.1: —
| Benchmark | Gemini 3.8 Flash | Grok Build 0.1 |
|---|---|---|
| LMArena Vision | 1314 | — |
| Blueprint-Bench 2 | 38.6% | — |
| Furniture Assembly | 31.7% | — |
Multilingual Not comparable
Gemini 3.8 Flash: 58.0 (#5), Grok Build 0.1: —
| Benchmark | Gemini 3.8 Flash | Grok Build 0.1 |
|---|---|---|
| LMArena Non-English | 1491 | — |
| LMArena Chinese | 1554 | — |
| LMArena French | 1498 | — |
| LMArena German | 1493 | — |
| LMArena Japanese | 1502 | — |
| LMArena Korean | 1459 | — |
| LMArena Russian | 1515 | — |
| LMArena Spanish | 1485 | — |
Instruction Following Not comparable
Gemini 3.8 Flash: 78.0 (#13), Grok Build 0.1: —
| Benchmark | Gemini 3.8 Flash | Grok Build 0.1 |
|---|---|---|
| LMArena Instruction Following | 1490 | — |
Long Context Not comparable
Gemini 3.8 Flash: 46.3 (#24), Grok Build 0.1: —
| Benchmark | Gemini 3.8 Flash | Grok Build 0.1 |
|---|---|---|
| LMArena Longer Query | 1508 | — |
Writing & Preference Not comparable
Gemini 3.8 Flash: 72.2 (#15), Grok Build 0.1: —
| Benchmark | Gemini 3.8 Flash | Grok Build 0.1 |
|---|---|---|
| LMArena Text | 1499 | — |
| LMArena Creative Writing | 1492 | — |
| EQ-Bench Creative Writing | 1748 | — |
| LMArena Multi-Turn | 1501 | — |
Frequently asked questions
Is Gemini 3.8 Flash better than Grok Build 0.1?
Gemini 3.8 Flash is the stronger model overall, scoring 61.8 to 36.4 on the Noometry Index.
Which is cheaper, Gemini 3.8 Flash or Grok Build 0.1?
Grok Build 0.1 is cheaper. It lists at $1 per million input tokens and $2 per million output tokens; Gemini 3.8 Flash lists at $0.75 and $3.75.
Is Gemini 3.8 Flash or Grok Build 0.1 better for coding?
Gemini 3.8 Flash scores higher on coding benchmarks: 59.2 versus 43.1 in the Noometry coding category.
Which has the bigger context window?
Gemini 3.8 Flash does, with 1.05M tokens against 256K.
How many benchmarks do Gemini 3.8 Flash and Grok Build 0.1 share?
2 benchmarks have published results for both models. Gemini 3.8 Flash has 50 scored results on Noometry and Grok Build 0.1 has 3.