Skip to main content
BenchLM

Model comparison

Claude Opus 4.8 vs GPT-5.2

Data verified

Head-to-head evidence from 22 shared benchmark results across 7 categories. Overall scores shown here use BenchLM's provisional ranking lane.

85/100
Margin
10.0pts
← winning
GPT-5.2
OpenAI
75/100
3 category wins2 category wins

Verified leaderboard positions: Claude Opus 4.8 #3; GPT-5.2 #29

Evidence parity. Claude Opus 4.8 and GPT-5.2 share 22 comparable benchmark results. 5 of 8 categories are comparable. 31 results are unique to Claude Opus 4.8; 7 to GPT-5.2.

Updated July 12, 2026
Shared results
22
Claude Opus 4.8 only
31
GPT-5.2 only
7
Comparable categories
5 / 8

Pick Claude Opus 4.8 if you want the stronger benchmark profile. GPT-5.2 only becomes the better choice if knowledge is the priority or you want the cheaper token bill.

Confidence note. This is a partial-evidence comparison with 22 shared benchmark results across 7 evidence categories; 5 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.

Why this result

Claude Opus 4.8 is clearly ahead on the provisional aggregate, 85 to 75. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Claude Opus 4.8's sharpest advantage is in agentic, where it averages 80.3 against 55.7. The single biggest benchmark swing on the page is OSWorld-Verified, 83.4% to 47.3%. GPT-5.2 does hit back in knowledge, so the answer changes if that is the part of the workload you care about most.

Claude Opus 4.8 is also the more expensive model on tokens at $5.00 input / $25.00 output per 1M tokens, versus $1.75 input / $14.00 output per 1M tokens for GPT-5.2. Claude Opus 4.8 gives you the larger context window at 1M, compared with 400K for GPT-5.2.

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 Opus 4.8 and GPT-5.2
CategoryClaude Opus 4.8ΔGPT-5.2
KnowledgeClaude Opus 4.862.7Margin→ 29.7GPT-5.292.4
AgenticClaude Opus 4.880.3Margin← 24.6GPT-5.255.7
MathClaude Opus 4.853.9Margin← 18.7GPT-5.235.2
CodingClaude Opus 4.876.4Margin← 11.7GPT-5.264.7
MultimodalClaude Opus 4.877.0Margin→ 3.4GPT-5.280.4
ReasoningClaude Opus 4.8Not measuredMarginNo overlapGPT-5.252.9

Decisive benchmark drivers

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

More
A · Claude Opus 4.8B · GPT-5.2

  1. OSWorld-Verified

    Agentic
    Source ↗
    A 83.4%B 47.3%
    Winner: Claude Opus 4.8Δ 36.1
    OSWorld-Verified: Claude Opus 4.8 scored 83.4%; GPT-5.2 scored 47.3%. Claude Opus 4.8 wins this benchmark.

  2. BrowseComp

    Agentic
    Source ↗
    A 84.3%B 65.8%
    Winner: Claude Opus 4.8Δ 18.5
    BrowseComp: Claude Opus 4.8 scored 84.3%; GPT-5.2 scored 65.8%. Claude Opus 4.8 wins this benchmark.

  3. SWE-bench Pro

    Coding
    Source ↗
    A 69.2%B 55.6%
    Winner: Claude Opus 4.8Δ 13.6
    SWE-bench Pro: Claude Opus 4.8 scored 69.2%; GPT-5.2 scored 55.6%. Claude Opus 4.8 wins this benchmark.

  4. FrontierMath v2 (Tier 4)

    Math
    Source ↗
    A 31.250%B 18.800%
    Winner: Claude Opus 4.8Δ 12.5
    FrontierMath v2 (Tier 4): Claude Opus 4.8 scored 31.250%; GPT-5.2 scored 18.800%. Claude Opus 4.8 wins this benchmark.

  5. SWE-bench Verified

    Coding
    Source ↗
    A 88.6%B 80%
    Winner: Claude Opus 4.8Δ 8.6
    SWE-bench Verified: Claude Opus 4.8 scored 88.6%; GPT-5.2 scored 80%. Claude Opus 4.8 wins this benchmark.

Operational comparison

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

MetricClaude Opus 4.8GPT-5.2Comparison
Input / output priceUSD per 1M tokensClaude Opus 4.8$5 input / $25 outputGPT-5.2$1.75 input / $14 outputGPT-5.2 has the lower combined listed price.
Generation speedtokens per secondClaude Opus 4.8Not availableGPT-5.273 tok/sA complete speed comparison is not available.
First-answer latencyseconds to first tokenClaude Opus 4.8Not availableGPT-5.2130.34 sA complete latency comparison is not available.
Context windowmaximum listed tokensClaude Opus 4.81MGPT-5.2400KClaude Opus 4.8 lists the larger context window.

Benchmark Deep Dive

AgenticClaude Opus 4.8 wins
BenchmarkClaude Opus 4.8GPT-5.2Result
Terminal-Bench 2.0Source 74.6%—Not comparable
BrowseCompSource 84.3%65.8%Claude Opus 4.8 leads
DeepSearchQASource 93.1%—Not comparable
OSWorld-VerifiedSource 83.4%47.3%Claude Opus 4.8 leads
Finance Agent v2Source 53.9%—Not comparable
GDPval-AASource 1600—Not comparable
MCP AtlasSource 82.2%—Not comparable
ToolathlonSource 59.9%—Not comparable
Gert LabsSource 72.97%46.54%Claude Opus 4.8 leads
AA Agentic IndexSource 47.2%—Not comparable
Tau2-TelecomSource 94.4%84.8%Claude Opus 4.8 leads
GDPval-AASource 55.0%—Not comparable
ResearchClawBenchSource 21.1%—Not comparable
OSWorld 2.0Source 20.6%—Not comparable
AA BriefcaseSource 1354—Not comparable
AA AutomationBenchSource 48.5%—Not comparable
AA EnterpriseOps-GymSource 44.0%—Not comparable
AA Harvey LABSource 7.5%—Not comparable
AA Tau3 BankingSource 27.6%—Not comparable
JobBenchSource —34.3%Not comparable
CodingClaude Opus 4.8 wins
BenchmarkClaude Opus 4.8GPT-5.2Result
SWE-bench VerifiedSource 88.6%80%Claude Opus 4.8 leads
SWE-bench ProSource 69.2%55.6%Claude Opus 4.8 leads
SWE MultilingualSource 84.4%—Not comparable
SWE MultimodalSource 38.4%—Not comparable
Terminal-Bench 2.0Source 74.6%—Not comparable
cursorBench31Source 58.4%—Not comparable
cursorBench32Source 62.3%—Not comparable
AA Coding IndexSource 74.3%—Not comparable
Terminal-Bench HardSource 58.3%47.0%Claude Opus 4.8 leads
AA-SciCodeSource 53.5%52.1%Claude Opus 4.8 leads
FrontierCodeSource 46.5%—Not comparable
AA Terminal-Bench 2.1Source 84.6%—Not comparable
Vibe Code BenchSource —53.50%Not comparable
Reasoning
BenchmarkClaude Opus 4.8GPT-5.2Result
AA-LCRSource 67.7%72.7%GPT-5.2 leads
CritPtSource 20.9%11.6%Claude Opus 4.8 leads
ARC-AGI-2Source —52.9%Not comparable
KnowledgeGPT-5.2 wins
BenchmarkClaude Opus 4.8GPT-5.2Result
GPQASource 93.6%92.4%Claude Opus 4.8 leads
GPQA-DSource 93.6%—Not comparable
HLESource 57.9%—Not comparable
HLE w/o toolsSource 49.8%—Not comparable
Artificial Analysis Intelligence IndexSource 55.7%42.2%Claude Opus 4.8 leads
AA-GPQA DiamondSource 92.0%90.3%Claude Opus 4.8 leads
AA-HLESource 45.7%35.4%Claude Opus 4.8 leads
AA-Omniscience IndexSource 27.4%-1.0%Claude Opus 4.8 leads
AA-Omniscience AccuracySource 46.6%43.8%Claude Opus 4.8 leads
AA-Omniscience Hallucination RateSource 35.9%79.7%Claude Opus 4.8 leads
MathClaude Opus 4.8 wins
BenchmarkClaude Opus 4.8GPT-5.2Result
USAMO 2026Source 96.7%—Not comparable
FrontierMath v2 (Tiers 1-3)Source 47.241%40.700%Claude Opus 4.8 leads
FrontierMath v2 (Tier 4)Source 31.250%18.800%Claude Opus 4.8 leads
AA AIME 2025Source —99.0%Not comparable
Multilingual
BenchmarkClaude Opus 4.8GPT-5.2Result
INCLUDESource 87.6%—Not comparable
MultimodalGPT-5.2 wins
BenchmarkClaude Opus 4.8GPT-5.2Result
OfficeQA ProSource 66.2%—Not comparable
ScreenSpot ProSource 87.9%—Not comparable
CharXivSource 89.9%82.1%Claude Opus 4.8 leads
CharXiv w/o toolsSource 80.5%—Not comparable
Design Arena WebsiteSource 12811237Claude Opus 4.8 leads
MMMU-ProSource —79.5%Not comparable
MathVisionSource —83.0%Not comparable
V*Source —75.9%Not comparable
Inst. Following
BenchmarkClaude Opus 4.8GPT-5.2Result
AA-IFBenchSource 62.2%75.4%GPT-5.2 leads
Frequently Asked Questions (6)

Which is better, Claude Opus 4.8 or GPT-5.2?

Claude Opus 4.8 is ahead on BenchLM's provisional leaderboard, 85 to 75. The biggest single separator in this matchup is OSWorld-Verified, where the scores are 83.4% and 47.3%.

Which is better for knowledge tasks, Claude Opus 4.8 or GPT-5.2?

GPT-5.2 has the edge for knowledge tasks in this comparison, averaging 92.4 versus 62.7. Inside this category, AA-Omniscience Hallucination Rate is the benchmark that creates the most daylight between them.

Which is better for coding, Claude Opus 4.8 or GPT-5.2?

Claude Opus 4.8 has the edge for coding in this comparison, averaging 76.4 versus 64.7. Inside this category, SWE-bench Pro is the benchmark that creates the most daylight between them.

Which is better for math, Claude Opus 4.8 or GPT-5.2?

Claude Opus 4.8 has the edge for math in this comparison, averaging 53.9 versus 35.2. Inside this category, FrontierMath v2 (Tier 4) is the benchmark that creates the most daylight between them.

Which is better for agentic tasks, Claude Opus 4.8 or GPT-5.2?

Claude Opus 4.8 has the edge for agentic tasks in this comparison, averaging 80.3 versus 55.7. Inside this category, OSWorld-Verified is the benchmark that creates the most daylight between them.

Which is better for multimodal and grounded tasks, Claude Opus 4.8 or GPT-5.2?

GPT-5.2 has the edge for multimodal and grounded tasks in this comparison, averaging 80.4 versus 77. Inside this category, Design Arena Website is the benchmark that creates the most daylight between them.

Related Comparisons

Explore More

Anthropic Compare Pricing Methodology Find Your Best LLM Overall Rankings
Last updated: July 12, 2026

The AI models change fast. We track them for you.

A weekly brief for engineers and researchers covering new models, ranking shifts, and pricing changes.

Free. No spam. Unsubscribe anytime.