# GPT-5.4 mini vs Inkling

> GPT-5.4 mini and Inkling score almost the same on the Noometry Index (45.0 vs 44.1), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/gpt-5-4-mini-vs-inkling
- Last updated: 2026-10-10
- Shared benchmarks: 36

## Summary

- They share 36 benchmarks with published results for both. GPT-5.4 mini scores higher in 3 categories and Inkling in 6 categories; 7 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.4 mini leads 45.5 to 31.3.
- The biggest single-benchmark swing is WeirdML: 60.3% for GPT-5.4 mini and 32.3% for Inkling.
- GPT-5.4 mini is cheaper at $0.75 / $4.50 per million input/output tokens, against $1.87 / $4.68 for Inkling.
- GPT-5.4 mini accepts more context: 400K tokens versus 66K.
- Inkling has downloadable open weights; the other is API-only.

## Snapshot

| | GPT-5.4 mini | Inkling |
|---|---|---|
| Provider | OpenAI | Thinking Machines Lab |
| Noometry Index | 45.0 | 44.1 |
| Rank | 76 | 80 |
| Context | 400K | 66K |
| Input $/M | $0.75 | $1.87 |
| Output $/M | $4.50 | $4.68 |
| Weights | Proprietary | Open |

## Coding

- GPT-5.4 mini: 45.2 (#72)
- Inkling: 34.5 (#234)

| Benchmark | GPT-5.4 mini | Inkling |
|---|---|---|
| FrontierCode | 27% | 14% |
| LMArena WebDev | 1397 | 1413 |
| SciCode | 49.9% | 47% |
| WeirdML | 60.3% | 32.3% |
| LMArena Coding | 1438 | 1464 |
| ALE-Bench | 1,189 | 946 |
| FrontierSWE | — | 4.1% |

## Agentic & Tool Use

- GPT-5.4 mini: 29.9 (#81)
- Inkling: 29.6 (#85)

| Benchmark | GPT-5.4 mini | Inkling |
|---|---|---|
| APEX-Agents | — | 33.8% |
| τ²-bench Banking | — | 25% |
| DeepResearch Bench | 36.3% | — |

## Reasoning

- GPT-5.4 mini: 30.4 (#85)
- Inkling: 40.4 (#56)

| Benchmark | GPT-5.4 mini | Inkling |
|---|---|---|
| ARC-AGI-2 | 18.9% | 36.5% |
| ARC-AGI-1 | 63.7% | 79.5% |
| CritPt | 10% | 5.4% |
| Chess Puzzles | 24% | 21% |
| LMArena Hard Prompts | 1424 | 1451 |
| DTBench | 80% | 87.5% |
| LMCA | 40.8% | 37.6% |
| Epoch Capabilities Index | 148.84 | 148.54 |
| SimpleBench | — | 50% |
| Kagi LLM Benchmark | 37.9% | — |
| NYT Connections (extended) | 61.8% | — |
| Thematic Generalization | 61.7% | — |
| Mystery Game Puzzles | 11% | — |
| ForecastBench | 57 | — |

## Math

- GPT-5.4 mini: 45.5 (#75)
- Inkling: 31.3 (#225)

| Benchmark | GPT-5.4 mini | Inkling |
|---|---|---|
| FrontierMath (Tiers 1-3) | 51.2% | 33.3% |
| FrontierMath Tier 4 | 9.8% | 4.9% |
| OTIS Mock AIME 2024-2025 | 88.9% | 88.9% |
| ProofBench | 21% | 0% |
| LMArena Math | 1419 | 1479 |
| FrontierMath (Feb 2025 set) | 28.3% | — |
| FrontierMath Tier 4 (v1) | 2.1% | — |

## Knowledge

- GPT-5.4 mini: 51.5 (#67)
- Inkling: 55.1 (#49)

| Benchmark | GPT-5.4 mini | Inkling |
|---|---|---|
| GPQA Diamond | 86.9% | 88.3% |
| SimpleQA Verified | 29.4% | 40.3% |
| LMArena Expert | 1435 | 1465 |
| Vectara Hallucination Rate | 5.5% | — |

## Multimodal

- GPT-5.4 mini: 39.7 (#56)
- Inkling: —

| Benchmark | GPT-5.4 mini | Inkling |
|---|---|---|
| LMArena Vision | 1245 | — |

## Multilingual

- GPT-5.4 mini: 51.9 (#96)
- Inkling: 54.0 (#52)

| Benchmark | GPT-5.4 mini | Inkling |
|---|---|---|
| LMArena Non-English | 1405 | 1434 |
| LMArena Chinese | 1446 | 1490 |
| LMArena French | 1440 | 1458 |
| LMArena German | 1409 | 1446 |
| LMArena Japanese | 1374 | 1429 |
| LMArena Korean | 1368 | 1404 |
| LMArena Russian | 1417 | 1429 |
| LMArena Spanish | 1405 | 1448 |

## Instruction Following

- GPT-5.4 mini: 74.1 (#102)
- Inkling: 75.1 (#71)

| Benchmark | GPT-5.4 mini | Inkling |
|---|---|---|
| LMArena Instruction Following | 1405 | 1426 |

## Long Context

- GPT-5.4 mini: 43.0 (#112)
- Inkling: 43.8 (#86)

| Benchmark | GPT-5.4 mini | Inkling |
|---|---|---|
| LMArena Longer Query | 1407 | 1434 |

## Writing & Preference

- GPT-5.4 mini: 64.0 (#58)
- Inkling: 65.2 (#51)

| Benchmark | GPT-5.4 mini | Inkling |
|---|---|---|
| LMArena Text | 1412 | 1441 |
| LMArena Creative Writing | 1370 | 1387 |
| EQ-Bench Creative Writing | 1665 | 1611 |
| LMArena Multi-Turn | 1429 | 1436 |
| EQ-Bench 4 | — | 1226 |

## FAQ

### Is GPT-5.4 mini better than Inkling?

GPT-5.4 mini and Inkling score almost the same on the Noometry Index (45.0 vs 44.1), so choose on price, context window or the category you care about most.

### Which is cheaper, GPT-5.4 mini or Inkling?

GPT-5.4 mini is cheaper. It lists at $0.75 per million input tokens and $4.50 per million output tokens; Inkling lists at $1.87 and $4.68.

### Is GPT-5.4 mini or Inkling better for coding?

GPT-5.4 mini scores higher on coding benchmarks: 45.2 versus 34.5 in the Noometry coding category.

### Which has the bigger context window?

GPT-5.4 mini does, with 400K tokens against 66K.

### How many benchmarks do GPT-5.4 mini and Inkling share?

36 benchmarks have published results for both models. GPT-5.4 mini has 46 scored results on Noometry and Inkling has 41.