Model comparison
Claude Opus 4.1 vs Grok Build 0.1
Claude Opus 4.1 is the stronger model overall, scoring 41.0 to 36.4 on the Noometry Index. Grok Build 0.1 costs 24× less per token, which makes it the better buy when Claude Opus 4.1's lead doesn't matter for your workload.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in agentic & tool use, where Claude Opus 4.1 leads 35.0 to 22.7.
- Grok Build 0.1 is cheaper at $1 / $2 per million input/output tokens, against $15 / $75 for Claude Opus 4.1.
- Grok Build 0.1 accepts more context: 256K tokens versus 200K.
Side by side
| Claude Opus 4.1 | Grok Build 0.1 | |
|---|---|---|
| Provider | Anthropic | xAI |
| Noometry Index | 41.0 | 36.4 |
| Released | 2025-08-05 | 2026-04-16 |
| Weights | Proprietary | Proprietary |
| Context window | 200K | 256K |
| Max output | 32K | 256K |
| Input $ / M tokens | $15 | $1 |
| Output $ / M tokens | $75 | $2 |
| Results tracked | 48 | 3 |
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Category by category
Coding Claude Opus 4.1 leads
Claude Opus 4.1: 44.4 (#73), Grok Build 0.1: 43.1 (#91)
| Benchmark | Claude Opus 4.1 | Grok Build 0.1 |
|---|---|---|
| SWE-bench Verified | 73.3% | — |
| LMArena WebDev | 1390 | — |
| SciCode | — | 50.2% |
| WeirdML | 45.9% | — |
| LMArena Coding | 1479 | — |
| ALE-Bench | 674.77 | — |
| AlgoTune | 1.34 | — |
Agentic & Tool Use Claude Opus 4.1 leads
Claude Opus 4.1: 35.0 (#41), Grok Build 0.1: 22.7 (#129)
| Benchmark | Claude Opus 4.1 | Grok Build 0.1 |
|---|---|---|
| Terminal-Bench | 38% | — |
| GDPval | 43.6% | — |
| Cybench | 42% | — |
| DeepResearch Bench | 48.3% | — |
| GBAEval | — | 2.4% |
| LMArena Search | 1148 | — |
| METR Time Horizons | 66.8% | — |
Reasoning Too close to call
Claude Opus 4.1: 32.2 (#76), Grok Build 0.1: 32.2 (#77)
| Benchmark | Claude Opus 4.1 | Grok Build 0.1 |
|---|---|---|
| SimpleBench | 60% | — |
| CritPt | — | 9.1% |
| Chess Puzzles | 7% | — |
| EnigmaEval | 7.2% | — |
| EBR-Bench | 7.9% | — |
| LMArena Hard Prompts | 1443 | — |
| Mystery Game Puzzles | 21% | — |
| DTBench | 80% | — |
| LMCA | 37.1% | — |
| Epoch Capabilities Index | 144.12 | — |
| ForecastBench | 62 | — |
Math Not comparable
Claude Opus 4.1: 22.3 (#277), Grok Build 0.1: —
| Benchmark | Claude Opus 4.1 | Grok Build 0.1 |
|---|---|---|
| FrontierMath (Tiers 1-3) | 12.6% | — |
| FrontierMath Tier 4 | 2.4% | — |
| OTIS Mock AIME 2024-2025 | 68.9% | — |
| LMArena Math | 1431 | — |
| FrontierMath (Feb 2025 set) | 7.2% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |
Knowledge Not comparable
Claude Opus 4.1: 42.0 (#101), Grok Build 0.1: —
| Benchmark | Claude Opus 4.1 | Grok Build 0.1 |
|---|---|---|
| GPQA Diamond | 77.3% | — |
| Humanity's Last Exam | 11.5% | — |
| Confabulations | 17.1% | — |
| Vectara Hallucination Rate | 11.8% | — |
| LMArena Expert | 1439 | — |
Multimodal Not comparable
Claude Opus 4.1: 26.8 (#119), Grok Build 0.1: —
| Benchmark | Claude Opus 4.1 | Grok Build 0.1 |
|---|---|---|
| VPCT | 35% | — |
Multilingual Not comparable
Claude Opus 4.1: 52.0 (#95), Grok Build 0.1: —
| Benchmark | Claude Opus 4.1 | Grok Build 0.1 |
|---|---|---|
| LMArena Non-English | 1405 | — |
| LMArena Chinese | 1427 | — |
| LMArena French | 1431 | — |
| LMArena German | 1413 | — |
| LMArena Japanese | 1378 | — |
| LMArena Korean | 1380 | — |
| LMArena Russian | 1422 | — |
| LMArena Spanish | 1448 | — |
Instruction Following Not comparable
Claude Opus 4.1: 75.6 (#58), Grok Build 0.1: —
| Benchmark | Claude Opus 4.1 | Grok Build 0.1 |
|---|---|---|
| LMArena Instruction Following | 1435 | — |
Long Context Not comparable
Claude Opus 4.1: 44.5 (#63), Grok Build 0.1: —
| Benchmark | Claude Opus 4.1 | Grok Build 0.1 |
|---|---|---|
| LMArena Longer Query | 1455 | — |
Writing & Preference Not comparable
Claude Opus 4.1: 62.4 (#74), Grok Build 0.1: —
| Benchmark | Claude Opus 4.1 | Grok Build 0.1 |
|---|---|---|
| LMArena Text | 1419 | — |
| LMArena Creative Writing | 1412 | — |
| Short-Story Creative Writing | 84.7% | — |
| LMArena Multi-Turn | 1444 | — |
Frequently asked questions
Is Claude Opus 4.1 better than Grok Build 0.1?
Claude Opus 4.1 is the stronger model overall, scoring 41.0 to 36.4 on the Noometry Index. Grok Build 0.1 costs 24× less per token, which makes it the better buy when Claude Opus 4.1's lead doesn't matter for your workload.
Which is cheaper, Claude Opus 4.1 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; Claude Opus 4.1 lists at $15 and $75.
Is Claude Opus 4.1 or Grok Build 0.1 better for coding?
Claude Opus 4.1 scores higher on coding benchmarks: 44.4 versus 43.1 in the Noometry coding category.
Which has the bigger context window?
Grok Build 0.1 does, with 256K tokens against 200K.
How many benchmarks do Claude Opus 4.1 and Grok Build 0.1 share?
0 benchmarks have published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and Grok Build 0.1 has 3.