Model comparison
GPT-4.1 vs Grok Code Fast 1
Head-to-head evidence from 12 shared benchmark results across 5 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: GPT-4.1 #111 (Supported); Grok Code Fast 1 #189 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. GPT-4.1 and Grok Code Fast 1 share 12 comparable benchmark results. 1 of 8 categories are comparable. 8 results are unique to GPT-4.1; 0 to Grok Code Fast 1.
Updated July 24, 2026- Shared results
- 12
- GPT-4.1 only
- 8
- Grok Code Fast 1 only
- 0
- Comparable categories
- 1 / 8
Pick GPT-4.1 if you want the stronger benchmark profile. Grok Code Fast 1 only becomes the better choice if coding is the priority or you want the cheaper token bill.
Confidence note. This is a partial-evidence comparison with 12 shared benchmark results across 5 evidence categories; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
GPT-4.1 is clearly ahead on the BenchAlign aggregate, 50.44 to 37.77. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-4.1 is also the more expensive model on tokens at $2.00 input / $8.00 output per 1M tokens, versus $0.20 input / $1.50 output per 1M tokens for Grok Code Fast 1. That is roughly 5.3x on output cost alone. GPT-4.1 gives you the larger context window at 1M, compared with 256K for Grok Code Fast 1.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | GPT-4.1 | Δ | Grok Code Fast 1 |
|---|---|---|---|
| Coding | GPT-4.154.6 | Margin→ 16.2 | Grok Code Fast 170.8 |
| Knowledge | GPT-4.166.3 | MarginNo overlap | Grok Code Fast 1Not measured |
| Math | GPT-4.14.1 | MarginNo overlap | Grok Code Fast 1Not measured |
| Inst. Following | GPT-4.187.4 | MarginNo overlap | Grok Code Fast 1Not measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
SWE-bench Verified
CodingA 54.6%B 70.8%Winner: Grok Code Fast 1Δ 16.2SWE-bench Verified: GPT-4.1 scored 54.6%; Grok Code Fast 1 scored 70.8%. Grok Code Fast 1 wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | GPT-4.1 | Grok Code Fast 1 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | GPT-4.1$2 input / $8 output | Grok Code Fast 1$0.2 input / $1.5 output | Grok Code Fast 1 has the lower combined listed price. |
| Generation speedtokens per second | GPT-4.1108 tok/s | Grok Code Fast 1172 tok/s | Grok Code Fast 1 has the higher measured throughput. |
| First-answer latencyseconds to first token | GPT-4.11.02 s | Grok Code Fast 12.81 s | GPT-4.1 reaches the first token sooner. |
| Context windowmaximum listed tokens | GPT-4.11M | Grok Code Fast 1256K | GPT-4.1 lists the larger context window. |
Benchmark Deep Dive
Agentic2 benchmarks
CodingGrok Code Fast 1 wins2 benchmarks
Reasoning2 benchmarks
Knowledge8 benchmarks
| Benchmark | GPT-4.1 | Grok Code Fast 1 | Result |
|---|---|---|---|
| MMLUSource | 90.2% | — | Not comparable |
| GPQASource | 66.3% | — | Not comparable |
| Artificial Analysis Intelligence IndexSource | 19.4% | 21.6% | Grok Code Fast 1 leads |
| AA-GPQA DiamondSource | 66.6% | 72.7% | Grok Code Fast 1 leads |
| AA-HLESource | 4.6% | 7.5% | Grok Code Fast 1 leads |
| AA-Omniscience IndexSource | -36.2% | -36.0% | Grok Code Fast 1 leads |
| AA-Omniscience AccuracySource | 24.2% | 23.8% | GPT-4.1 leads |
| AA-Omniscience Hallucination RateSource | 79.6% | 78.5% | Grok Code Fast 1 leads |
Math2 benchmarks
Multimodal2 benchmarks
Frequently Asked Questions (2)
Which is better, GPT-4.1 or Grok Code Fast 1?
GPT-4.1 is ahead on BenchLM's BenchAlign leaderboard, 50.44 to 37.77. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 54.6% and 70.8%.
Which is better for coding, GPT-4.1 or Grok Code Fast 1?
Grok Code Fast 1 has the edge for coding in this comparison, averaging 70.8 versus 54.6. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.