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Model comparison

Claude 4.1 Opus vs Claude Haiku 4.5

Data verified

Head-to-head evidence from 3 shared benchmark results across 3 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.

45.88/100
Margin
10.7pts
winning →
56.58/100
1 category wins0 category wins

Public leaderboard positions: Claude 4.1 Opus #142 (Supported); Claude Haiku 4.5 #77 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. Claude 4.1 Opus and Claude Haiku 4.5 share 3 comparable benchmark results. 1 of 8 categories are comparable. 1 result is unique to Claude 4.1 Opus; 2 to Claude Haiku 4.5.

Updated July 22, 2026
Shared results
3
Claude 4.1 Opus only
1
Claude Haiku 4.5 only
2
Comparable categories
1 / 8

Pick Claude Haiku 4.5 if you want the stronger benchmark profile. Claude 4.1 Opus only becomes the better choice if coding is the priority.

Confidence note. This is a partial-evidence comparison with 3 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

Claude Haiku 4.5 is clearly ahead on the BenchAlign aggregate, 56.58 to 45.88. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Claude 4.1 Opus is also the more expensive model on tokens at $15.00 input / $75.00 output per 1M tokens, versus $1.00 input / $5.00 output per 1M tokens for Claude Haiku 4.5. That is roughly 15.0x on output cost alone.

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 scores and score margins for Claude 4.1 Opus and Claude Haiku 4.5
CategoryClaude 4.1 OpusΔClaude Haiku 4.5
CodingClaude 4.1 Opus74.5Margin← 1.2Claude Haiku 4.573.3
MathClaude 4.1 OpusNot measuredMarginNo overlapClaude Haiku 4.54.9

Decisive benchmark drivers

The largest measured benchmark gaps in this matchup, with exact reported values.

More
A · Claude 4.1 OpusB · Claude Haiku 4.5

  1. SWE-bench Verified

    Coding
    Source ↗
    A 74.5%B 73.3%
    Winner: Claude 4.1 OpusΔ 1.2
    SWE-bench Verified: Claude 4.1 Opus scored 74.5%; Claude Haiku 4.5 scored 73.3%. Claude 4.1 Opus wins this benchmark.

Operational comparison

Runtime and commercial metrics are compared only when both models have a complete sourced value.

MetricClaude 4.1 OpusClaude Haiku 4.5Comparison
Input / output priceUSD per 1M tokensClaude 4.1 Opus$15 input / $75 outputClaude Haiku 4.5$1 input / $5 outputClaude Haiku 4.5 has the lower combined listed price.
Generation speedtokens per secondClaude 4.1 Opus29 tok/sClaude Haiku 4.5Not availableA complete speed comparison is not available.
First-answer latencyseconds to first tokenClaude 4.1 Opus1.66 sClaude Haiku 4.5Not availableA complete latency comparison is not available.
Context windowmaximum listed tokensClaude 4.1 Opus200KClaude Haiku 4.5200KListed context windows are equal.

Benchmark Deep Dive

Agentic
BenchmarkClaude 4.1 OpusClaude Haiku 4.5Result
JobBenchSource 21.9%16.0%Claude 4.1 Opus leads
CodingClaude 4.1 Opus wins
BenchmarkClaude 4.1 OpusClaude Haiku 4.5Result
SWE-bench VerifiedSource 74.5%73.3%Claude 4.1 Opus leads
Knowledge
BenchmarkClaude 4.1 OpusClaude Haiku 4.5Result
Artificial Analysis Intelligence IndexSource 28.2%—Not comparable
Math
BenchmarkClaude 4.1 OpusClaude Haiku 4.5Result
FrontierMath v2 (Tiers 1-3)Source —5.903%Not comparable
FrontierMath v2 (Tier 4)Source —2.083%Not comparable
Multimodal
BenchmarkClaude 4.1 OpusClaude Haiku 4.5Result
Design Arena WebsiteSource 12071152Claude 4.1 Opus leads
Frequently Asked Questions (2)

Which is better, Claude 4.1 Opus or Claude Haiku 4.5?

Claude Haiku 4.5 is ahead on BenchLM's BenchAlign leaderboard, 56.58 to 45.88. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 74.5% and 73.3%.

Which is better for coding, Claude 4.1 Opus or Claude Haiku 4.5?

Claude 4.1 Opus has the edge for coding in this comparison, averaging 74.5 versus 73.3. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.

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