Noometry

Model comparison

Claude Opus 4.8 vs o4-mini

Claude Opus 4.8 is the stronger model overall, scoring 60.7 to 41.6 on the Noometry Index. o4-mini costs 5.2× less per token, which makes it the better buy when Claude Opus 4.8's lead doesn't matter for your workload.

Last verified . 40 shared benchmarks.

Claude Opus 4.8 Anthropic

60.7

Rank #13 Confirmed

o4-mini OpenAI

41.6

Rank #132 Confirmed

Summary

  • They share 40 benchmarks with published results for both. Claude Opus 4.8 scores higher in 9 categories and o4-mini in 1 category; 9 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Claude Opus 4.8 leads 64.7 to 24.6.
  • The biggest single-benchmark swing is ARC-AGI-2: 72.1% for Claude Opus 4.8 and 6.1% for o4-mini.
  • o4-mini is cheaper at $1.10 / $4.40 per million input/output tokens, against $5 / $25 for Claude Opus 4.8.
  • Claude Opus 4.8 accepts more context: 1M tokens versus 200K.

Side by side

Claude Opus 4.8o4-mini
ProviderAnthropicOpenAI
Noometry Index60.741.6
Released2026-05-282025-04-16
WeightsProprietaryProprietary
Context window1M200K
Max output128K100K
Input $ / M tokens$5$1.10
Output $ / M tokens$25$4.40
Results tracked6560

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Category by category

Coding Claude Opus 4.8 leads

Claude Opus 4.8: 59.9 (#12), o4-mini: 40.9 (#127)

BenchmarkClaude Opus 4.8o4-mini
GSO47.1%3.6%
WeirdML82.9%52.6%
LMArena Coding14901368
ALE-Bench1,564826.17
DeepSWE59%—
FrontierCode46.5%—
SWE-bench Verified (bash only)—45%
Aider Polyglot—72%
LMArena WebDev1556—
SciCode53.5%—
CadEval—62%
AlgoTune—1.72

Agentic & Tool Use Claude Opus 4.8 leads

Claude Opus 4.8: 47.6 (#11), o4-mini: 32.6 (#61)

BenchmarkClaude Opus 4.8o4-mini
APEX-Agents48.9%—
Berkeley Function Calling Leaderboard—53.2%
OSWorld 2.020.6%—
GDPval—25.3%
Remote Labor Index8.3%—
τ²-bench Banking39.7%—
DeepResearch Bench50.2%—
PostTrainBench33.8%—
GBAEval70.9%—
GDP.pdf24%—
LMArena Search1204—
METR Time Horizons—63.9%
Vending-Bench 25,787—

Reasoning Claude Opus 4.8 leads

Claude Opus 4.8: 64.7 (#16), o4-mini: 24.6 (#162)

BenchmarkClaude Opus 4.8o4-mini
ARC-AGI-272.1%6.1%
SimpleBench64.8%38.7%
Kagi LLM Benchmark88.8%67.6%
ARC-AGI-192.5%58.7%
CritPt20.9%0.6%
Chess Puzzles34%26%
EnigmaEval23.5%9.2%
LMArena Hard Prompts14821351
Mystery Game Puzzles36%5%
DTBench94.9%77.6%
LMCA57.5%26.5%
Epoch Capabilities Index158.21145.64
ForecastBench59.961.8
NYT Connections (extended)91.1%—
EBR-Bench28.6%—
Surface Evolver Bench87.5%—
Bench to the Future 30.14—

Math Claude Opus 4.8 leads

Claude Opus 4.8: 78.4 (#13), o4-mini: 40.8 (#89)

BenchmarkClaude Opus 4.8o4-mini
FrontierMath (Tiers 1-3)80%36.1%
FrontierMath Tier 456.1%4.9%
OTIS Mock AIME 2024-202598.3%81.7%
LMArena Math14871389
FrontierMath (Feb 2025 set)47.2%24.8%
FrontierMath Tier 4 (v1)31.3%6.3%
MathArena Final-Answer Competitions91.8%—
ProofBench69%—
Omni-MATH—72%
MATH Level 5—97.8%

Knowledge Claude Opus 4.8 leads

Claude Opus 4.8: 61.3 (#29), o4-mini: 43.6 (#91)

BenchmarkClaude Opus 4.8o4-mini
GPQA Diamond91%79.6%
SimpleQA Verified53%19.6%
LMArena Expert15021343
Humanity's Last Exam—18.1%
MMLU-Pro—82%
Confabulations—15.8%
Vectara Hallucination Rate—18.6%
GPQA (HELM)—73.5%

Multimodal Claude Opus 4.8 leads

Claude Opus 4.8: 42.9 (#26), o4-mini: 40.2 (#49)

BenchmarkClaude Opus 4.8o4-mini
LMArena Vision12941194
GeoBench—64%
VPCT—57.5%
Blueprint-Bench 214.5%—
Furniture Assembly42.5%—
LMArena Document1475—

Multilingual Claude Opus 4.8 leads

Claude Opus 4.8: 55.2 (#33), o4-mini: 47.0 (#154)

BenchmarkClaude Opus 4.8o4-mini
LMArena Non-English14501337
LMArena Chinese15071354
LMArena French14811364
LMArena German14721336
LMArena Japanese14401308
LMArena Korean14321312
LMArena Russian14741334
LMArena Spanish14661347

Instruction Following Claude Opus 4.8 leads

Claude Opus 4.8: 77.4 (#24), o4-mini: 75.2 (#68)

BenchmarkClaude Opus 4.8o4-mini
LMArena Instruction Following14761321
IFEval—92.8%

Long Context Too close to call

Claude Opus 4.8: 45.4 (#35), o4-mini: 45.5 (#33)

BenchmarkClaude Opus 4.8o4-mini
LMArena Longer Query14831315
Fiction.LiveBench—77.8%

Writing & Preference Claude Opus 4.8 leads

Claude Opus 4.8: 72.0 (#16), o4-mini: 54.0 (#152)

BenchmarkClaude Opus 4.8o4-mini
LMArena Text14611353
LMArena Creative Writing14541294
LMArena Multi-Turn14761350
Short-Story Creative Writing—75%
EQ-Bench Creative Writing1840—
WildBench—85.4%
EQ-Bench 41281—

Frequently asked questions

Is Claude Opus 4.8 better than o4-mini?

Claude Opus 4.8 is the stronger model overall, scoring 60.7 to 41.6 on the Noometry Index. o4-mini costs 5.2× less per token, which makes it the better buy when Claude Opus 4.8's lead doesn't matter for your workload.

Which is cheaper, Claude Opus 4.8 or o4-mini?

o4-mini is cheaper. It lists at $1.10 per million input tokens and $4.40 per million output tokens; Claude Opus 4.8 lists at $5 and $25.

Is Claude Opus 4.8 or o4-mini better for coding?

Claude Opus 4.8 scores higher on coding benchmarks: 59.9 versus 40.9 in the Noometry coding category.

Which has the bigger context window?

Claude Opus 4.8 does, with 1M tokens against 200K.

How many benchmarks do Claude Opus 4.8 and o4-mini share?

40 benchmarks have published results for both models. Claude Opus 4.8 has 65 scored results on Noometry and o4-mini has 60.

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