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Model comparison

GPT-5.4 mini vs Grok 4.5

Data verified

Head-to-head evidence from 15 shared benchmark results across 5 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.

56.77/100
Margin
19.9pts
winning →
76.72/100
0 category wins1 category wins

Public leaderboard positions: GPT-5.4 mini #75 (Estimated); Grok 4.5 #7 (Supported). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.

Evidence parity. GPT-5.4 mini and Grok 4.5 share 15 comparable benchmark results. 1 of 8 categories are comparable. 15 results are unique to GPT-5.4 mini; 13 to Grok 4.5.

Updated July 23, 2026
Shared results
15
GPT-5.4 mini only
15
Grok 4.5 only
13
Comparable categories
1 / 8

Pick Grok 4.5 if you want the stronger benchmark profile. GPT-5.4 mini only becomes the better choice if you want the cheaper token bill.

Confidence note. This is a partial-evidence comparison with 15 shared benchmark results across 5 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

Grok 4.5 is clearly ahead on the BenchAlign aggregate, 76.72 to 56.77. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Grok 4.5's sharpest advantage is in agentic, where it averages 83.3 against 65.7. The single biggest benchmark swing on the page is Terminal-Bench 2.0, 60% to 83.3%.

Grok 4.5 is also the more expensive model on tokens at $2.00 input / $6.00 output per 1M tokens, versus $0.75 input / $4.50 output per 1M tokens for GPT-5.4 mini. Grok 4.5 gives you the larger context window at 500K, compared with 400K for GPT-5.4 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 scores and score margins for GPT-5.4 mini and Grok 4.5
CategoryGPT-5.4 miniΔGrok 4.5
AgenticGPT-5.4 mini65.7Margin→ 17.6Grok 4.583.3
CodingGPT-5.4 miniNot measuredMarginNo overlapGrok 4.564.7
KnowledgeGPT-5.4 mini47.8MarginNo overlapGrok 4.5Not measured
MathGPT-5.4 mini21.7MarginNo overlapGrok 4.5Not measured
MultimodalGPT-5.4 mini76.6MarginNo overlapGrok 4.5Not measured

Decisive benchmark drivers

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

More
A · GPT-5.4 miniB · Grok 4.5

  1. Terminal-Bench 2.0

    Agentic
    Source ↗
    A 60%B 83.3%
    Winner: Grok 4.5Δ 23.3
    Terminal-Bench 2.0: GPT-5.4 mini scored 60%; Grok 4.5 scored 83.3%. Grok 4.5 wins this benchmark.

Operational comparison

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

MetricGPT-5.4 miniGrok 4.5Comparison
Input / output priceUSD per 1M tokensGPT-5.4 mini$0.75 input / $4.5 outputGrok 4.5$2 input / $6 outputGPT-5.4 mini has the lower combined listed price.
Generation speedtokens per secondGPT-5.4 mini201 tok/sGrok 4.5Not availableA complete speed comparison is not available.
First-answer latencyseconds to first tokenGPT-5.4 mini3.85 sGrok 4.5Not availableA complete latency comparison is not available.
Context windowmaximum listed tokensGPT-5.4 mini400KGrok 4.5500KGrok 4.5 lists the larger context window.

Benchmark Deep Dive

AgenticGrok 4.5 wins
BenchmarkGPT-5.4 miniGrok 4.5Result
Terminal-Bench 2.0Source 60%83.3%Grok 4.5 leads
OSWorld-VerifiedSource 72.1%—Not comparable
MCP AtlasSource 57.7%—Not comparable
ToolathlonSource 42.9%—Not comparable
τ²-bench resultsSource 83.3%—Not comparable
AA Agentic IndexSource 30.2%45.7%Grok 4.5 leads
APEX-Agents-AASource 28.2%—Not comparable
GDPval-AASource 33.6%51.7%Grok 4.5 leads
GDPval-AASource 11711535Grok 4.5 leads
deepSweSource —53%Not comparable
AA BriefcaseSource —1323Not 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
Coding
BenchmarkGPT-5.4 miniGrok 4.5Result
Vibe Code BenchSource 47.97%—Not comparable
AA Coding IndexSource 56.1%72.5%Grok 4.5 leads
AA-SciCodeSource 49.9%54.1%Grok 4.5 leads
FrontierCode 1.1 MainSource 27.0%—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
Reasoning
BenchmarkGPT-5.4 miniGrok 4.5Result
AA-LCRSource 69.3%67.7%GPT-5.4 mini leads
CritPtSource 10.0%15.4%Grok 4.5 leads
Knowledge
BenchmarkGPT-5.4 miniGrok 4.5Result
GPQASource 88%—Not comparable
HLESource 41.5%—Not comparable
HLE w/o toolsSource 28.2%—Not comparable
Artificial Analysis Intelligence IndexSource 40.0%53.8%Grok 4.5 leads
AA-GPQA DiamondSource 87.5%93.1%Grok 4.5 leads
AA-HLESource 26.6%40.3%Grok 4.5 leads
AA-Omniscience IndexSource -18.7%26.4%Grok 4.5 leads
AA-Omniscience AccuracySource 37.5%52.1%Grok 4.5 leads
AA-Omniscience Hallucination RateSource 89.8%53.5%Grok 4.5 leads
Math
BenchmarkGPT-5.4 miniGrok 4.5Result
FrontierMath v2 (Tiers 1-3)Source 28.280%—Not comparable
FrontierMath v2 (Tier 4)Source 2.080%—Not comparable
Multimodal
BenchmarkGPT-5.4 miniGrok 4.5Result
MMMU-ProSource 76.6%—Not comparable
MMMU-Pro w/ PythonSource 78%—Not comparable
AA-MMMU-ProSource 73.3%80.4%Grok 4.5 leads
Design Arena WebsiteSource —1325Not comparable
Inst. Following
BenchmarkGPT-5.4 miniGrok 4.5Result
AA-IFBenchSource 73.3%—Not comparable
Frequently Asked Questions (2)

Which is better, GPT-5.4 mini or Grok 4.5?

Grok 4.5 is ahead on BenchLM's BenchAlign leaderboard, 76.72 to 56.77. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 60% and 83.3%.

Which is better for agentic tasks, GPT-5.4 mini or Grok 4.5?

Grok 4.5 has the edge for agentic tasks in this comparison, averaging 83.3 versus 65.7. Inside this category, GDPval-AA is the benchmark that creates the most daylight between them.

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