Noometry

Model comparison

Claude Opus 5 vs GPT-4o

Claude Opus 5 is the stronger model overall, scoring 67.8 to 28.6 on the Noometry Index. GPT-4o costs 2.3× less per token, which makes it the better buy when Claude Opus 5's lead doesn't matter for your workload.

Last verified . 32 shared benchmarks.

Claude Opus 5 Anthropic

67.8

Rank #4 Confirmed

GPT-4o OpenAI

28.6

Rank #324 Confirmed

Summary

  • They share 32 benchmarks with published results for both. Claude Opus 5 scores higher in 10 categories and GPT-4o in 0 categories; 10 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Opus 5 leads 86.2 to 10.6.
  • The biggest single-benchmark swing is ARC-AGI-1: 97.5% for Claude Opus 5 and 4.5% for GPT-4o.
  • GPT-4o is cheaper at $2.50 / $10 per million input/output tokens, against $5 / $25 for Claude Opus 5.
  • Claude Opus 5 accepts more context: 1M tokens versus 128K.

Side by side

Claude Opus 5GPT-4o
ProviderAnthropicOpenAI
Noometry Index67.828.6
Released2026-07-242024-05-13
WeightsProprietaryProprietary
Context window1M128K
Max output128K16K
Input $ / M tokens$5$2.50
Output $ / M tokens$25$10
Results tracked5772

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Category by category

Coding Claude Opus 5 leads

Claude Opus 5: 67.5 (#5), GPT-4o: 24.8 (#328)

BenchmarkClaude Opus 5GPT-4o
WeirdML91.8%25.1%
LMArena Coding15341297
SWE-bench Verified—31%
DeepSWE73.6%—
FrontierCode53.4%—
SWE-bench Verified (bash only)—21.6%
Aider Polyglot—45.3%
CursorBench46.6%—
LMArena WebDev1691—
FrontierSWE52%—
SciCode56.4%—
GSO—0%
BigCodeBench Instruct—51.1%
LiveBench Coding—51.4%
BigCodeBench Complete—61.1%
CadEval—26%
ALE-Bench2,165—
HumanEval+—87.2%
MBPP+—72.2%

Agentic & Tool Use Claude Opus 5 leads

Claude Opus 5: 55.6 (#1), GPT-4o: 21.0 (#141)

BenchmarkClaude Opus 5GPT-4o
BALROG63.4%32.3%
APEX-Agents65.8%—
OSWorld 2.031.4%—
GDPval—9.9%
TheAgentCompany—8.6%
τ²-bench Banking48.7%—
Cybench—12.5%
PostTrainBench35%—
GBAEval79.6%—
GDP.pdf24%—
LMArena Search—1006
METR Time Horizons—40.8%
Vending-Bench 211,182—

Reasoning Claude Opus 5 leads

Claude Opus 5: 77.2 (#4), GPT-4o: 9.4 (#343)

BenchmarkClaude Opus 5GPT-4o
ARC-AGI-290.4%0%
SimpleBench80.6%17.8%
ARC-AGI-197.5%4.5%
CritPt29.1%0%
Chess Puzzles42%13%
LMArena Hard Prompts15261281
DTBench97.9%64.5%
LMCA64.5%16.6%
Epoch Capabilities Index162.78128.97
NYT Connections (extended)94.3%—
EnigmaEval—0.8%
EBR-Bench45.7%—
LiveBench Reasoning—55.8%
Mystery Game Puzzles59%—
LiveBench Data Analysis—60.9%
Bench to the Future 30.12—
ForecastBench—57.7
LiveBench—55.3%

Math Claude Opus 5 leads

Claude Opus 5: 86.2 (#8), GPT-4o: 10.6 (#312)

BenchmarkClaude Opus 5GPT-4o
FrontierMath (Tiers 1-3)85.6%0.4%
OTIS Mock AIME 2024-202598.9%6.4%
LMArena Math15311285
FrontierMath Tier 473.2%—
ProofBench99%—
Omni-MATH—29.3%
LiveBench Math—49.5%
MATH Level 5—53.3%
FrontierMath (Feb 2025 set)—0.3%

Knowledge Claude Opus 5 leads

Claude Opus 5: 66.8 (#9), GPT-4o: 28.8 (#242)

BenchmarkClaude Opus 5GPT-4o
GPQA Diamond93.9%49.2%
SimpleQA Verified59.9%26%
LMArena Expert15571250
Humanity's Last Exam—2.7%
MMLU-Pro—71.3%
Confabulations—15.3%
Vectara Hallucination Rate—9.6%
GPQA (HELM)—52%
MMLU—88.1%

Multimodal Claude Opus 5 leads

Claude Opus 5: 50.8 (#8), GPT-4o: 34.5 (#91)

BenchmarkClaude Opus 5GPT-4o
LMArena Vision13191137
Video-MME—71.9%
GeoBench—71%
VPCT—40%
Blueprint-Bench 230.4%—
Furniture Assembly60.8%—
LMArena Document1516—
ScienceQA—88.5%

Multilingual Claude Opus 5 leads

Claude Opus 5: 58.8 (#4), GPT-4o: 43.2 (#186)

BenchmarkClaude Opus 5GPT-4o
LMArena Non-English15011283
LMArena Chinese15741277
LMArena French15191304
LMArena German15241282
LMArena Japanese15161257
LMArena Korean15211234
LMArena Russian15071286
LMArena Spanish15191292

Instruction Following Claude Opus 5 leads

Claude Opus 5: 79.2 (#7), GPT-4o: 66.6 (#207)

BenchmarkClaude Opus 5GPT-4o
LMArena Instruction Following15171278
LiveBench Instruction Following—68.6%
IFEval—81.7%

Long Context Claude Opus 5 leads

Claude Opus 5: 46.5 (#21), GPT-4o: 39.4 (#179)

BenchmarkClaude Opus 5GPT-4o
LMArena Longer Query15151289
Fiction.LiveBench—66.7%

Writing & Preference Claude Opus 5 leads

Claude Opus 5: 79.2 (#1), GPT-4o: 52.6 (#166)

BenchmarkClaude Opus 5GPT-4o
LMArena Text15071300
LMArena Creative Writing14911292
LMArena Multi-Turn14991302
Short-Story Creative Writing—81.8%
EQ-Bench Creative Writing2133—
WildBench—82.8%
EQ-Bench 41385—
LiveBench Language—47.6%

Frequently asked questions

Is Claude Opus 5 better than GPT-4o?

Claude Opus 5 is the stronger model overall, scoring 67.8 to 28.6 on the Noometry Index. GPT-4o costs 2.3× less per token, which makes it the better buy when Claude Opus 5's lead doesn't matter for your workload.

Which is cheaper, Claude Opus 5 or GPT-4o?

GPT-4o is cheaper. It lists at $2.50 per million input tokens and $10 per million output tokens; Claude Opus 5 lists at $5 and $25.

Is Claude Opus 5 or GPT-4o better for coding?

Claude Opus 5 scores higher on coding benchmarks: 67.5 versus 24.8 in the Noometry coding category.

Which has the bigger context window?

Claude Opus 5 does, with 1M tokens against 128K.

How many benchmarks do Claude Opus 5 and GPT-4o share?

32 benchmarks have published results for both models. Claude Opus 5 has 57 scored results on Noometry and GPT-4o has 72.

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