Model comparison
Grok 4.20 vs o3-mini
Head-to-head evidence from 1 shared benchmark result across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Grok 4.20 #93 (Estimated); o3-mini #141 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Grok 4.20 and o3-mini share 1 comparable benchmark result. 1 of 8 categories are comparable. 18 results are unique to Grok 4.20; 9 to o3-mini.
Updated July 28, 2026- Shared results
- 1
- Grok 4.20 only
- 18
- o3-mini only
- 9
- Comparable categories
- 1 / 8
Pick Grok 4.20 if you want the stronger benchmark profile. o3-mini only becomes the better choice if you want the cheaper token bill.
Confidence note. This is a partial-evidence comparison with 1 shared benchmark result across 1 evidence category; 1 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Grok 4.20 is clearly ahead on the BenchAlign aggregate, 53.88 to 46.55. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Grok 4.20's sharpest advantage is in coding, where it averages 67.1 against 49.3. The single biggest benchmark swing on the page is SWE-bench Verified, 76.7% to 49.3%.
Grok 4.20 is also the more expensive model on tokens at $2.00 input / $6.00 output per 1M tokens, versus $1.10 input / $4.40 output per 1M tokens for o3-mini. Grok 4.20 gives you the larger context window at 2M, 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 4.20 | Δ | o3-mini |
|---|---|---|---|
| Coding | Grok 4.2067.1 | Margin← 17.8 | o3-mini49.3 |
| Agentic | Grok 4.2047.1 | MarginNo overlap | o3-miniNot measured |
| Reasoning | Grok 4.2053.3 | MarginNo overlap | o3-miniNot measured |
| Knowledge | Grok 4.20Not measured | MarginNo overlap | o3-mini77.2 |
| Multimodal | Grok 4.2070.1 | MarginNo overlap | o3-miniNot measured |
| Inst. Following | Grok 4.20Not 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 76.7%B 49.3%Winner: Grok 4.20Δ 27.4SWE-bench Verified: Grok 4.20 scored 76.7%; o3-mini scored 49.3%. Grok 4.20 wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Grok 4.20 | o3-mini | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Grok 4.20$2 input / $6 output | o3-mini$1.1 input / $4.4 output | o3-mini has the lower combined listed price. |
| Generation speedtokens per second | Grok 4.20233 tok/s | o3-mini160 tok/s | Grok 4.20 has the higher measured throughput. |
| First-answer latencyseconds to first token | Grok 4.2010.33 s | o3-mini7.12 s | o3-mini reaches the first token sooner. |
| Context windowmaximum listed tokens | Grok 4.202M | o3-mini200K | Grok 4.20 lists the larger context window. |
Benchmark Deep Dive
Agentic4 benchmarks
CodingGrok 4.20 wins5 benchmarks
Reasoning2 benchmarks
Knowledge9 benchmarks
| Benchmark | Grok 4.20 | o3-mini | Result |
|---|---|---|---|
| GPQA-DSource | 88.5% | — | Not comparable |
| HLE w/o toolsSource | 31.6% | — | Not comparable |
| HealthBench HardSource | 20.3% | — | Not comparable |
| MedXpertQA (Text)Source | 50.2% | — | Not comparable |
| MMLUSource | — | 86.9% | Not comparable |
| GPQASource | — | 77.2% | Not comparable |
| Artificial Analysis Intelligence IndexSource | — | 19.0% | Not comparable |
| AA-GPQA DiamondSource | — | 74.8% | Not comparable |
| AA-HLESource | — | 8.7% | Not comparable |
Math1 benchmarks
| Benchmark | Grok 4.20 | o3-mini | Result |
|---|---|---|---|
| AIME 2024Source | — | 87.3% | Not comparable |
Multimodal6 benchmarks
Inst. Following1 benchmarks
| Benchmark | Grok 4.20 | o3-mini | Result |
|---|---|---|---|
| IFEvalSource | — | 93.9% | Not comparable |
Frequently Asked Questions (2)
Which is better, Grok 4.20 or o3-mini?
Grok 4.20 is ahead on BenchLM's BenchAlign leaderboard, 53.88 to 46.55. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 76.7% and 49.3%.
Which is better for coding, Grok 4.20 or o3-mini?
Grok 4.20 has the edge for coding in this comparison, averaging 67.1 versus 49.3. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
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