Model comparison
Claude Haiku 4.5 vs Grok 4
Head-to-head evidence from 2 shared benchmark results across 1 category. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: Claude Haiku 4.5 #77 (Estimated); Grok 4 #50 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Haiku 4.5 and Grok 4 share 2 comparable benchmark results. 1 of 8 categories are comparable. 3 results are unique to Claude Haiku 4.5; 14 to Grok 4.
Updated July 22, 2026- Shared results
- 2
- Claude Haiku 4.5 only
- 3
- Grok 4 only
- 14
- Comparable categories
- 1 / 8
Pick Grok 4 if you want the stronger benchmark profile. Claude Haiku 4.5 only becomes the better choice if you need the larger 200K context window.
Confidence note. This is a partial-evidence comparison with 2 shared benchmark results 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 is clearly ahead on the BenchAlign aggregate, 60.42 to 56.58. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Grok 4's sharpest advantage is in mathematics, where it averages 15.3 against 4.9. The single biggest benchmark swing on the page is FrontierMath v2 (Tiers 1-3), 5.903% to 19.655%.
Claude Haiku 4.5 gives you the larger context window at 200K, compared with 128K for Grok 4.
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 | Claude Haiku 4.5 | Δ | Grok 4 |
|---|---|---|---|
| Math | Claude Haiku 4.54.9 | Margin→ 10.4 | Grok 415.3 |
| Coding | Claude Haiku 4.573.3 | MarginNo overlap | Grok 4Not measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
FrontierMath v2 (Tiers 1-3)
MathA 5.903%B 19.655%Winner: Grok 4Δ 13.8FrontierMath v2 (Tiers 1-3): Claude Haiku 4.5 scored 5.903%; Grok 4 scored 19.655%. Grok 4 wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude Haiku 4.5 | Grok 4 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Haiku 4.5$1 input / $5 output | Grok 4Not available | A complete price comparison is not available. |
| Generation speedtokens per second | Claude Haiku 4.5Not available | Grok 454 tok/s | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Haiku 4.5Not available | Grok 415.60 s | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Haiku 4.5200K | Grok 4128K | Claude Haiku 4.5 lists the larger context window. |
Benchmark Deep Dive
Agentic3 benchmarks
Coding3 benchmarks
Reasoning2 benchmarks
Knowledge6 benchmarks
| Benchmark | Claude Haiku 4.5 | Grok 4 | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | — | 33.3% | Not comparable |
| AA-GPQA DiamondSource | — | 87.7% | Not comparable |
| AA-HLESource | — | 23.9% | Not comparable |
| AA-Omniscience IndexSource | — | 3.8% | Not comparable |
| AA-Omniscience AccuracySource | — | 41.4% | Not comparable |
| AA-Omniscience Hallucination RateSource | — | 64.2% | Not comparable |
MathGrok 4 wins2 benchmarks
Multimodal2 benchmarks
Inst. Following1 benchmarks
| Benchmark | Claude Haiku 4.5 | Grok 4 | Result |
|---|---|---|---|
| AA-IFBenchSource | — | 53.7% | Not comparable |
Frequently Asked Questions (2)
Which is better, Claude Haiku 4.5 or Grok 4?
Grok 4 is ahead on BenchLM's BenchAlign leaderboard, 60.42 to 56.58. The biggest single separator in this matchup is FrontierMath v2 (Tiers 1-3), where the scores are 5.903% and 19.655%.
Which is better for math, Claude Haiku 4.5 or Grok 4?
Grok 4 has the edge for math in this comparison, averaging 15.3 versus 4.9. Inside this category, FrontierMath v2 (Tiers 1-3) is the benchmark that creates the most daylight between them.
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