# Grok 4.1 Fast vs Inkling

> Side-by-side benchmark comparison for Grok 4.1 Fast and Inkling across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/grok-4-1-fast-vs-inkling
- Last updated: October 14, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Grok 4.1 Fast and Inkling.

## Summary

- Grok 4.1 Fast and Inkling do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | Grok 4.1 Fast | Inkling |
|----------|----------|----------|
| Creator | xAI | Thinking Machines Lab |
| Type | Proprietary | Open Weight |
| Reasoning | Non-Reasoning | Hybrid |
| Context | 1M | 1M |
| Independent public score (not head-to-head) | 36.09 | 52.13 |
| Benchmarks Covered | 1 | 24 |
| Pricing (input/output) | $0.20 / $0.50 | $1.87 / $4.68 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Grok 4.1 Fast public-lane score: Coming soon
- Inkling public-lane score: 36.2 (Supported · #72/124)

| Benchmark | Grok 4.1 Fast | Inkling | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | 47.32% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 63.8% | Coming soon |
| BrowseComp | Coming soon | 77.1% | Coming soon |
| MCP Atlas | Coming soon | 74.1% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 47.6% | Coming soon |
| CWE-bench v1 | Coming soon | 37.0% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Grok 4.1 Fast public-lane score: Coming soon
- Inkling public-lane score: 34 (Supported · #80/149)

| Benchmark | Grok 4.1 Fast | Inkling | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | Coming soon | 77.6% | Coming soon |
| SWE-bench Pro | Coming soon | 54.3% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 63.8% | Coming soon |
| FrontierSWE v2 | Coming soon | 4.1% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 85.5% | Coming soon |
| SWE-bench (Vals) | Coming soon | 77.6% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Grok 4.1 Fast public-lane score: 47.4 (Unranked · 2 rankable rows)
- Inkling public-lane score: 79 (#14/29)

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Grok 4.1 Fast public-lane score: 35.9 (Unranked · 1 rankable row)
- Inkling public-lane score: 67.5 (#35/54)

| Benchmark | Grok 4.1 Fast | Inkling | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 73.5% | Coming soon |
| CharXiv | Coming soon | 82% | Coming soon |
| CharXiv w/o tools | Coming soon | 78.1% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Grok 4.1 Fast public-lane score: 31.7 (Estimated · #146/181)
- Inkling public-lane score: 54.5 (Supported · #62/181)

| Benchmark | Grok 4.1 Fast | Inkling | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 87.9% | Coming soon |
| GPQA-D | Coming soon | 87.9% | Coming soon |
| HLE | Coming soon | 46% | Coming soon |
| HLE w/o tools | Coming soon | 30% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 87.1% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 86.3% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Grok 4.1 Fast public-lane score: 41.9 (#102/128)
- Inkling public-lane score: 87.6 (#35/128)

| Benchmark | Grok 4.1 Fast | Inkling | Winner |
|-----------|-----------|-----------|--------|
| IFBench | Coming soon | 79.8% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Grok 4.1 Fast public-lane score: Coming soon
- Inkling public-lane score: 58.3 (#11/12)

| Benchmark | Grok 4.1 Fast | Inkling | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | Coming soon | 97.1% | Coming soon |
| FrontierMath v2 (Tiers 1-3) | Coming soon | 33.333% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 4.878% | Coming soon |

## FAQ

### Can I compare Grok 4.1 Fast and Inkling on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [Grok 4.1 Fast vs Grok 4.1 Fast (Reasoning)](/compare/grok-4-1-fast-vs-grok-4-1-fast-reasoning)
- [Inkling vs Grok 4.1 Fast (Reasoning)](/compare/grok-4-1-fast-reasoning-vs-inkling)
- [Grok 4.1 Fast vs Inkling-Small](/compare/grok-4-1-fast-vs-inkling-small)
- [Inkling vs Inkling-Small](/compare/inkling-vs-inkling-small)

## Explore More

- [Grok 4.1 Fast profile](/models/grok-4-1-fast)
- [Inkling profile](/models/inkling)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)