Model comparison
Grok 4.1 Fast vs o4-mini (high)
Head-to-head evidence from 0 shared benchmark results across 0 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Grok 4.1 Fast #107 (Supported); o4-mini (high) #118 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Grok 4.1 Fast and o4-mini (high) share 0 comparable benchmark results. 0 of 8 categories are comparable. 13 results are unique to Grok 4.1 Fast; 2 to o4-mini (high).
Updated July 21, 2026- Shared results
- 0
- Grok 4.1 Fast only
- 13
- o4-mini (high) only
- 2
- Comparable categories
- 0 / 8
Benchmark data for Grok 4.1 Fast and o4-mini (high) is coming soon on BenchLM.
Confidence note. This is a partial-evidence comparison with 0 shared benchmark results across 0 evidence categories; 0 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.
Grok 4.1 Fast has the larger context window at 1M, compared with 200K for o4-mini (high).
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Grok 4.1 Fast | o4-mini (high) | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Grok 4.1 Fast$0.2 input / $0.5 output | o4-mini (high)Not available | A complete price comparison is not available. |
| Generation speedtokens per second | Grok 4.1 Fast138 tok/s | o4-mini (high)161 tok/s | o4-mini (high) has the higher measured throughput. |
| First-answer latencyseconds to first token | Grok 4.1 Fast0.54 s | o4-mini (high)21.94 s | Grok 4.1 Fast reaches the first token sooner. |
| Context windowmaximum listed tokens | Grok 4.1 Fast1M | o4-mini (high)200K | Grok 4.1 Fast lists the larger context window. |
Benchmark Deep Dive
Agentic2 benchmarks
Coding1 benchmarks
| Benchmark | Grok 4.1 Fast | o4-mini (high) | Result |
|---|---|---|---|
| AA-SciCodeSource | 29.6% | — | Not comparable |
Reasoning2 benchmarks
Knowledge6 benchmarks
| Benchmark | Grok 4.1 Fast | o4-mini (high) | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 16.9% | — | Not comparable |
| AA-GPQA DiamondSource | 63.7% | — | Not comparable |
| AA-HLESource | 5.0% | — | Not comparable |
| AA-Omniscience IndexSource | -50.9% | — | Not comparable |
| AA-Omniscience AccuracySource | 17.0% | — | Not comparable |
| AA-Omniscience Hallucination RateSource | 81.8% | — | Not comparable |
Math2 benchmarks
Multimodal1 benchmarks
| Benchmark | Grok 4.1 Fast | o4-mini (high) | Result |
|---|---|---|---|
| AA-MMMU-ProSource | 48.4% | — | Not comparable |
Inst. Following1 benchmarks
| Benchmark | Grok 4.1 Fast | o4-mini (high) | Result |
|---|---|---|---|
| AA-IFBenchSource | 36.5% | — | Not comparable |
Frequently Asked Questions (3)
Can I compare Grok 4.1 Fast and o4-mini (high) on BenchLM yet?
Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.
Why does this comparison show “coming soon”?
BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.
What data is available for Grok 4.1 Fast and o4-mini (high) today?
Grok 4.1 Fast: $0.20 input / $0.50 output per 1M tokens o4-mini (high): Pricing unavailable Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
Related Comparisons
Explore More
Choose a model with this week’s evidence
Join 2,000+ readers for ranking moves, pricing changes, and the claims that still need proof.
One email each week. Unsubscribe anytime.