# Grok 4.1 Fast vs o3-mini

> Side-by-side benchmark comparison for Grok 4.1 Fast and o3-mini across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/grok-4-1-fast-vs-o3-mini
- Last updated: September 10, 2026

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

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Grok 4.1 Fast and o3-mini.

## Summary

- Grok 4.1 Fast and o3-mini 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 | o3-mini |
|----------|----------|----------|
| Creator | xAI | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 1M | 200K |
| Independent public score (not head-to-head) | 47.26 | 46.83 |
| Benchmarks Covered | 1 | 5 |
| Pricing (input/output) | $0.20 / $0.50 | $1.10 / $4.40 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Grok 4.1 Fast public-lane score: Coming soon
- o3-mini public-lane score: Coming soon

| Benchmark | Grok 4.1 Fast | o3-mini | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | 47.32% | Coming soon | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Grok 4.1 Fast public-lane score: Coming soon
- o3-mini public-lane score: 45.3 (Estimated · #88/151)

| Benchmark | Grok 4.1 Fast | o3-mini | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | Coming soon | 49.3% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Grok 4.1 Fast public-lane score: 31.3 (Unranked · 1 rankable row)
- o3-mini public-lane score: Coming soon

### Reasoning

- Winner: Insufficient shared evidence
- Grok 4.1 Fast public-lane score: 42.5 (Unranked · 2 rankable rows)
- o3-mini public-lane score: Coming soon

### Knowledge

- Winner: Insufficient shared evidence
- Grok 4.1 Fast public-lane score: 40.6 (Estimated · #130/183)
- o3-mini public-lane score: 39.7 (Supported · #134/183)

| Benchmark | Grok 4.1 Fast | o3-mini | Winner |
|-----------|-----------|-----------|--------|
| MMLU | Coming soon | 86.9% | Coming soon |
| GPQA | Coming soon | 77.2% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Grok 4.1 Fast public-lane score: 42.1 (#101/123)
- o3-mini public-lane score: Coming soon

| Benchmark | Grok 4.1 Fast | o3-mini | Winner |
|-----------|-----------|-----------|--------|
| IFEval | Coming soon | 93.9% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Grok 4.1 Fast public-lane score: Coming soon
- o3-mini public-lane score: Coming soon

| Benchmark | Grok 4.1 Fast | o3-mini | Winner |
|-----------|-----------|-----------|--------|
| AIME 2024 | Coming soon | 87.3% | Coming soon |

## FAQ

### Can I compare Grok 4.1 Fast and o3-mini 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)
- [o3-mini vs Grok 4.1 Fast (Reasoning)](/compare/grok-4-1-fast-reasoning-vs-o3-mini)
- [Grok 4.1 Fast vs o3](/compare/grok-4-1-fast-vs-o3)
- [o3-mini vs o3](/compare/o3-vs-o3-mini)

## Explore More

- [Grok 4.1 Fast profile](/models/grok-4-1-fast)
- [o3-mini profile](/models/o3-mini)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)