# Claude Opus 4.1 vs Inkling

> Inkling is the stronger model overall, scoring 44.1 to 41.0 on the Noometry Index.

- Canonical page: https://noometry.com/compare/claude-opus-4-1-vs-inkling
- Last updated: 2026-10-11
- Shared benchmarks: 29

## Summary

- They share 29 benchmarks with published results for both. Claude Opus 4.1 scores higher in 4 categories and Inkling in 5 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where Inkling leads 55.1 to 42.0.
- The biggest single-benchmark swing is FrontierMath (Tiers 1-3): 12.6% for Claude Opus 4.1 and 33.3% for Inkling.
- Inkling is cheaper at $1.87 / $4.68 per million input/output tokens, against $15 / $75 for Claude Opus 4.1.
- Claude Opus 4.1 accepts more context: 200K tokens versus 66K.
- Inkling has downloadable open weights; the other is API-only.

## Snapshot

| | Claude Opus 4.1 | Inkling |
|---|---|---|
| Provider | Anthropic | Thinking Machines Lab |
| Noometry Index | 41.0 | 44.1 |
| Rank | 142 | 80 |
| Context | 200K | 66K |
| Input $/M | $15 | $1.87 |
| Output $/M | $75 | $4.68 |
| Weights | Proprietary | Open |

## Coding

- Claude Opus 4.1: 44.4 (#73)
- Inkling: 34.5 (#234)

| Benchmark | Claude Opus 4.1 | Inkling |
|---|---|---|
| LMArena WebDev | 1390 | 1413 |
| WeirdML | 45.9% | 32.3% |
| LMArena Coding | 1479 | 1464 |
| ALE-Bench | 674.77 | 946 |
| SWE-bench Verified | 73.3% | — |
| FrontierCode | — | 14% |
| FrontierSWE | — | 4.1% |
| SciCode | — | 47% |
| AlgoTune | 1.34 | — |

## Agentic & Tool Use

- Claude Opus 4.1: 35.0 (#41)
- Inkling: 29.6 (#85)

| Benchmark | Claude Opus 4.1 | Inkling |
|---|---|---|
| Terminal-Bench | 38% | — |
| APEX-Agents | — | 33.8% |
| GDPval | 43.6% | — |
| τ²-bench Banking | — | 25% |
| Cybench | 42% | — |
| DeepResearch Bench | 48.3% | — |
| LMArena Search | 1148 | — |
| METR Time Horizons | 66.8% | — |

## Reasoning

- Claude Opus 4.1: 32.2 (#76)
- Inkling: 40.4 (#56)

| Benchmark | Claude Opus 4.1 | Inkling |
|---|---|---|
| SimpleBench | 60% | 50% |
| Chess Puzzles | 7% | 21% |
| LMArena Hard Prompts | 1443 | 1451 |
| DTBench | 80% | 87.5% |
| LMCA | 37.1% | 37.6% |
| Epoch Capabilities Index | 144.12 | 148.54 |
| ARC-AGI-2 | — | 36.5% |
| ARC-AGI-1 | — | 79.5% |
| CritPt | — | 5.4% |
| EnigmaEval | 7.2% | — |
| EBR-Bench | 7.9% | — |
| Mystery Game Puzzles | 21% | — |
| ForecastBench | 62 | — |

## Math

- Claude Opus 4.1: 22.3 (#277)
- Inkling: 31.3 (#225)

| Benchmark | Claude Opus 4.1 | Inkling |
|---|---|---|
| FrontierMath (Tiers 1-3) | 12.6% | 33.3% |
| FrontierMath Tier 4 | 2.4% | 4.9% |
| OTIS Mock AIME 2024-2025 | 68.9% | 88.9% |
| LMArena Math | 1431 | 1479 |
| ProofBench | — | 0% |
| FrontierMath (Feb 2025 set) | 7.2% | — |
| FrontierMath Tier 4 (v1) | 4.2% | — |

## Knowledge

- Claude Opus 4.1: 42.0 (#101)
- Inkling: 55.1 (#49)

| Benchmark | Claude Opus 4.1 | Inkling |
|---|---|---|
| GPQA Diamond | 77.3% | 88.3% |
| LMArena Expert | 1439 | 1465 |
| Humanity's Last Exam | 11.5% | — |
| SimpleQA Verified | — | 40.3% |
| Confabulations | 17.1% | — |
| Vectara Hallucination Rate | 11.8% | — |

## Multimodal

- Claude Opus 4.1: 26.8 (#119)
- Inkling: —

| Benchmark | Claude Opus 4.1 | Inkling |
|---|---|---|
| VPCT | 35% | — |

## Multilingual

- Claude Opus 4.1: 52.0 (#95)
- Inkling: 54.0 (#52)

| Benchmark | Claude Opus 4.1 | Inkling |
|---|---|---|
| LMArena Non-English | 1405 | 1434 |
| LMArena Chinese | 1427 | 1490 |
| LMArena French | 1431 | 1458 |
| LMArena German | 1413 | 1446 |
| LMArena Japanese | 1378 | 1429 |
| LMArena Korean | 1380 | 1404 |
| LMArena Russian | 1422 | 1429 |
| LMArena Spanish | 1448 | 1448 |

## Instruction Following

- Claude Opus 4.1: 75.6 (#58)
- Inkling: 75.1 (#71)

| Benchmark | Claude Opus 4.1 | Inkling |
|---|---|---|
| LMArena Instruction Following | 1435 | 1426 |

## Long Context

- Claude Opus 4.1: 44.5 (#63)
- Inkling: 43.8 (#86)

| Benchmark | Claude Opus 4.1 | Inkling |
|---|---|---|
| LMArena Longer Query | 1455 | 1434 |

## Writing & Preference

- Claude Opus 4.1: 62.4 (#74)
- Inkling: 65.2 (#51)

| Benchmark | Claude Opus 4.1 | Inkling |
|---|---|---|
| LMArena Text | 1419 | 1441 |
| LMArena Creative Writing | 1412 | 1387 |
| LMArena Multi-Turn | 1444 | 1436 |
| Short-Story Creative Writing | 84.7% | — |
| EQ-Bench Creative Writing | — | 1611 |
| EQ-Bench 4 | — | 1226 |

## FAQ

### Is Claude Opus 4.1 better than Inkling?

Inkling is the stronger model overall, scoring 44.1 to 41.0 on the Noometry Index.

### Which is cheaper, Claude Opus 4.1 or Inkling?

Inkling is cheaper. It lists at $1.87 per million input tokens and $4.68 per million output tokens; Claude Opus 4.1 lists at $15 and $75.

### Is Claude Opus 4.1 or Inkling better for coding?

Claude Opus 4.1 scores higher on coding benchmarks: 44.4 versus 34.5 in the Noometry coding category.

### Which has the bigger context window?

Claude Opus 4.1 does, with 200K tokens against 66K.

### How many benchmarks do Claude Opus 4.1 and Inkling share?

29 benchmarks have published results for both models. Claude Opus 4.1 has 48 scored results on Noometry and Inkling has 41.