Model comparison
Grok Code Fast 1 vs o3-mini
Head-to-head evidence from 6 shared benchmark results across 3 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Grok Code Fast 1 #189 (Supported); o3-mini #141 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Grok Code Fast 1 and o3-mini share 6 comparable benchmark results. 1 of 8 categories are comparable. 6 results are unique to Grok Code Fast 1; 4 to o3-mini.
Updated July 24, 2026- Shared results
- 6
- Grok Code Fast 1 only
- 6
- o3-mini only
- 4
- Comparable categories
- 1 / 8
Pick o3-mini 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 6 shared benchmark results across 3 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
o3-mini is clearly ahead on the BenchAlign aggregate, 46.59 to 37.77. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
o3-mini is also the more expensive model on tokens at $1.10 input / $4.40 output per 1M tokens, versus $0.20 input / $1.50 output per 1M tokens for Grok Code Fast 1. That is roughly 2.9x on output cost alone. o3-mini is the reasoning model in the pair, while Grok Code Fast 1 is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. Grok Code Fast 1 gives you the larger context window at 256K, compared with 200K for o3-mini.
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 | Grok Code Fast 1 | Δ | o3-mini |
|---|---|---|---|
| Coding | Grok Code Fast 170.8 | Margin← 21.5 | o3-mini49.3 |
| Knowledge | Grok Code Fast 1Not measured | MarginNo overlap | o3-mini77.2 |
| Inst. Following | Grok Code Fast 1Not measured | MarginNo overlap | o3-mini93.9 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
SWE-bench Verified
CodingA 70.8%B 49.3%Winner: Grok Code Fast 1Δ 21.5SWE-bench Verified: Grok Code Fast 1 scored 70.8%; o3-mini scored 49.3%. 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 | Grok Code Fast 1 | o3-mini | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Grok Code Fast 1$0.2 input / $1.5 output | o3-mini$1.1 input / $4.4 output | Grok Code Fast 1 has the lower combined listed price. |
| Generation speedtokens per second | Grok Code Fast 1172 tok/s | o3-mini160 tok/s | Grok Code Fast 1 has the higher measured throughput. |
| First-answer latencyseconds to first token | Grok Code Fast 12.81 s | o3-mini7.12 s | Grok Code Fast 1 reaches the first token sooner. |
| Context windowmaximum listed tokens | Grok Code Fast 1256K | o3-mini200K | Grok Code Fast 1 lists the larger context window. |
Benchmark Deep Dive
Agentic1 benchmarks
| Benchmark | Grok Code Fast 1 | o3-mini | Result |
|---|---|---|---|
| τ²-bench resultsSource | 75.7% | 28.7% | Grok Code Fast 1 leads |
CodingGrok Code Fast 1 wins2 benchmarks
Reasoning2 benchmarks
Knowledge8 benchmarks
| Benchmark | Grok Code Fast 1 | o3-mini | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 21.6% | 19.0% | Grok Code Fast 1 leads |
| AA-GPQA DiamondSource | 72.7% | 74.8% | o3-mini leads |
| AA-HLESource | 7.5% | 8.7% | o3-mini leads |
| AA-Omniscience IndexSource | -36.0% | — | Not comparable |
| AA-Omniscience AccuracySource | 23.8% | — | Not comparable |
| AA-Omniscience Hallucination RateSource | 78.5% | — | Not comparable |
| MMLUSource | — | 86.9% | Not comparable |
| GPQASource | — | 77.2% | Not comparable |
Math1 benchmarks
| Benchmark | Grok Code Fast 1 | o3-mini | Result |
|---|---|---|---|
| AIME 2024Source | — | 87.3% | Not comparable |
Frequently Asked Questions (2)
Which is better, Grok Code Fast 1 or o3-mini?
o3-mini is ahead on BenchLM's BenchAlign leaderboard, 46.59 to 37.77. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 70.8% and 49.3%.
Which is better for coding, Grok Code Fast 1 or o3-mini?
Grok Code Fast 1 has the edge for coding in this comparison, averaging 70.8 versus 49.3. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.