Model comparison
Claude Haiku 4.5 vs Grok 4.5
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: Claude Haiku 4.5 #77 (Estimated); Grok 4.5 #7 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Claude Haiku 4.5 and Grok 4.5 share 1 comparable benchmark result. 1 of 8 categories are comparable. 4 results are unique to Claude Haiku 4.5; 27 to Grok 4.5.
Updated July 23, 2026- Shared results
- 1
- Claude Haiku 4.5 only
- 4
- Grok 4.5 only
- 27
- Comparable categories
- 1 / 8
Pick Grok 4.5 if you want the stronger benchmark profile. Claude Haiku 4.5 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 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 4.5 is clearly ahead on the BenchAlign aggregate, 76.72 to 56.58. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Grok 4.5 is also the more expensive model on tokens at $2.00 input / $6.00 output per 1M tokens, versus $1.00 input / $5.00 output per 1M tokens for Claude Haiku 4.5. Grok 4.5 is the reasoning model in the pair, while Claude Haiku 4.5 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 4.5 gives you the larger context window at 500K, compared with 200K for Claude Haiku 4.5.
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 4.5 |
|---|---|---|---|
| Coding | Claude Haiku 4.573.3 | Margin← 8.6 | Grok 4.564.7 |
| Agentic | Claude Haiku 4.5Not measured | MarginNo overlap | Grok 4.583.3 |
| Math | Claude Haiku 4.54.9 | MarginNo overlap | Grok 4.5Not measured |
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Claude Haiku 4.5 | Grok 4.5 | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Claude Haiku 4.5$1 input / $5 output | Grok 4.5$2 input / $6 output | Claude Haiku 4.5 has the lower combined listed price. |
| Generation speedtokens per second | Claude Haiku 4.5Not available | Grok 4.5Not available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Claude Haiku 4.5Not available | Grok 4.5Not available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Claude Haiku 4.5200K | Grok 4.5500K | Grok 4.5 lists the larger context window. |
Benchmark Deep Dive
Agentic12 benchmarks
| Benchmark | Claude Haiku 4.5 | Grok 4.5 | Result |
|---|---|---|---|
| JobBenchSource | 16.0% | — | Not comparable |
| Terminal-Bench 2.0Source | — | 83.3% | Not comparable |
| deepSweSource | — | 53% | Not comparable |
| AA Agentic IndexSource | — | 45.7% | Not comparable |
| GDPval-AASource | — | 51.7% | Not comparable |
| GDPval-AASource | — | 1535 | Not comparable |
| AA BriefcaseSource | — | 1323 | Not comparable |
| AA AutomationBenchSource | — | 51.4% | Not comparable |
| AA EnterpriseOps-GymSource | — | 40.8% | Not comparable |
| AA Harvey LABSource | — | 92.4% | Not comparable |
| AA Tau3 BankingSource | — | 32.6% | Not comparable |
| aaTerminalBench21Source | — | 81.6% | Not comparable |
CodingClaude Haiku 4.5 wins8 benchmarks
| Benchmark | Claude Haiku 4.5 | Grok 4.5 | Result |
|---|---|---|---|
| SWE-bench VerifiedSource | 73.3% | — | Not comparable |
| SWE-bench ProSource | — | 64.7% | Not comparable |
| SWE MultilingualSource | — | 78% | Not comparable |
| Terminal-Bench 2.0Source | — | 83.3% | Not comparable |
| cursorBench32Source | — | 66.7% | Not comparable |
| VulcanBench v3Source | — | 91.3% | Not comparable |
| AA Coding IndexSource | — | 72.5% | Not comparable |
| AA-SciCodeSource | — | 54.1% | Not comparable |
Reasoning2 benchmarks
Knowledge6 benchmarks
| Benchmark | Claude Haiku 4.5 | Grok 4.5 | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | — | 53.8% | Not comparable |
| AA-GPQA DiamondSource | — | 93.1% | Not comparable |
| AA-HLESource | — | 40.3% | Not comparable |
| AA-Omniscience IndexSource | — | 26.4% | Not comparable |
| AA-Omniscience AccuracySource | — | 52.1% | Not comparable |
| AA-Omniscience Hallucination RateSource | — | 53.5% | Not comparable |
Math2 benchmarks
Frequently Asked Questions (2)
Which is better, Claude Haiku 4.5 or Grok 4.5?
Grok 4.5 is ahead on BenchLM's BenchAlign leaderboard, 76.72 to 56.58.
Which is better for coding, Claude Haiku 4.5 or Grok 4.5?
Claude Haiku 4.5 has the edge for coding in this comparison, averaging 73.3 versus 64.7. Grok 4.5 stays close enough that the answer can still flip depending on your workload.
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