Noometry

Model comparison

Claude Opus 4.7 vs o3-mini

Claude Opus 4.7 is the stronger model overall, scoring 58.3 to 36.7 on the Noometry Index. o3-mini costs 5.2× less per token, which makes it the better buy when Claude Opus 4.7's lead doesn't matter for your workload.

Last verified . 37 shared benchmarks.

Claude Opus 4.7 Anthropic

58.3

Rank #19 Confirmed

o3-mini OpenAI

36.7

Rank #212 Confirmed

Summary

  • They share 37 benchmarks with published results for both. Claude Opus 4.7 scores higher in 9 categories and o3-mini in 0 categories; 9 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Opus 4.7 leads 66.7 to 28.1.
  • The biggest single-benchmark swing is ARC-AGI-2: 75.8% for Claude Opus 4.7 and 3% for o3-mini.
  • o3-mini is cheaper at $1.10 / $4.40 per million input/output tokens, against $5 / $25 for Claude Opus 4.7.
  • Claude Opus 4.7 accepts more context: 1M tokens versus 200K.

Side by side

Claude Opus 4.7o3-mini
ProviderAnthropicOpenAI
Noometry Index58.336.7
Released2026-04-142024-12-20
WeightsProprietaryProprietary
Context window1M200K
Max output128K100K
Input $ / M tokens$5$1.10
Output $ / M tokens$25$4.40
Results tracked6651

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Category by category

Coding Claude Opus 4.7 leads

Claude Opus 4.7: 59.6 (#13), o3-mini: 40.8 (#132)

BenchmarkClaude Opus 4.7o3-mini
SciCode54.5%39.8%
GSO44.1%1.3%
WeirdML76.4%43.7%
LMArena Coding15181378
SWE-bench Verified83.5%—
FrontierCode38.5%—
Aider Polyglot—60.4%
LMArena WebDev1558—
LiveBench Coding—82.7%
MirrorCode31.1%—
CadEval—54%
ALE-Bench1,323—

Agentic & Tool Use Claude Opus 4.7 leads

Claude Opus 4.7: 47.9 (#10), o3-mini: 29.6 (#84)

BenchmarkClaude Opus 4.7o3-mini
Terminal-Bench80.2%—
APEX-Agents49.2%—
OSWorld 2.018.2%—
τ²-bench Banking40.2%—
Cybench—22.5%
PostTrainBench28.6%—
ExploitBench26.5%—
GBAEval43.8%—
GDP.pdf21%—
LMArena Search1233—
Vending-Bench 210,937—

Reasoning Claude Opus 4.7 leads

Claude Opus 4.7: 53.8 (#29), o3-mini: 16.3 (#305)

BenchmarkClaude Opus 4.7o3-mini
ARC-AGI-275.8%3%
SimpleBench61.7%22.8%
ARC-AGI-193.5%34.5%
CritPt12%0.3%
Chess Puzzles30%17%
LMArena Hard Prompts15061366
Mystery Game Puzzles28%7%
DTBench94.7%68.8%
LMCA52.2%19%
Epoch Capabilities Index156.25140.34
ForecastBench60.359.6
Kagi LLM Benchmark80.7%—
NYT Connections (extended)39%—
Thematic Generalization72.8%—
EBR-Bench19%—
LiveBench Reasoning—89.6%
LiveBench Data Analysis—70.6%
LiveBench—75.9%

Math Claude Opus 4.7 leads

Claude Opus 4.7: 66.7 (#26), o3-mini: 28.1 (#244)

BenchmarkClaude Opus 4.7o3-mini
FrontierMath (Tiers 1-3)70.2%18.6%
FrontierMath Tier 431.7%0%
OTIS Mock AIME 2024-202597.8%76.9%
LMArena Math14991396
FrontierMath (Feb 2025 set)43.8%12.4%
FrontierMath Tier 4 (v1)22.9%4.2%
MathArena Final-Answer Competitions73.6%—
ProofBench54%—
LiveBench Math—77.3%
MATH Level 5—96.5%

Knowledge Claude Opus 4.7 leads

Claude Opus 4.7: 62.6 (#23), o3-mini: 38.3 (#146)

BenchmarkClaude Opus 4.7o3-mini
GPQA Diamond90.2%77%
SimpleQA Verified51.7%15.3%
LMArena Expert15211364
Humanity's Last Exam36.2%—
Confabulations—17.9%
Vectara Hallucination Rate12%—

Multimodal Not comparable

Claude Opus 4.7: 41.2 (#38), o3-mini: —

BenchmarkClaude Opus 4.7o3-mini
LMArena Vision1316—
Blueprint-Bench 224.5%—
Furniture Assembly33.3%—
LMArena Document1495—

Multilingual Claude Opus 4.7 leads

Claude Opus 4.7: 57.3 (#10), o3-mini: 45.7 (#164)

BenchmarkClaude Opus 4.7o3-mini
LMArena Non-English14801319
LMArena Chinese15311379
LMArena French15031334
LMArena German14951303
LMArena Japanese14721286
LMArena Korean14641314
LMArena Russian14941304
LMArena Spanish14951321

Instruction Following Claude Opus 4.7 leads

Claude Opus 4.7: 78.4 (#10), o3-mini: 75.1 (#72)

BenchmarkClaude Opus 4.7o3-mini
LMArena Instruction Following14981337
LiveBench Instruction Following—84.4%

Long Context Claude Opus 4.7 leads

Claude Opus 4.7: 46.2 (#25), o3-mini: 33.8 (#256)

BenchmarkClaude Opus 4.7o3-mini
LMArena Longer Query15051343
Fiction.LiveBench—50%

Writing & Preference Claude Opus 4.7 leads

Claude Opus 4.7: 75.1 (#8), o3-mini: 50.3 (#182)

BenchmarkClaude Opus 4.7o3-mini
LMArena Text14901337
LMArena Creative Writing14861286
LMArena Multi-Turn15051320
Short-Story Creative Writing—61.7%
EQ-Bench Creative Writing1914—
EQ-Bench 41311—
LiveBench Language—50.7%

Frequently asked questions

Is Claude Opus 4.7 better than o3-mini?

Claude Opus 4.7 is the stronger model overall, scoring 58.3 to 36.7 on the Noometry Index. o3-mini costs 5.2× less per token, which makes it the better buy when Claude Opus 4.7's lead doesn't matter for your workload.

Which is cheaper, Claude Opus 4.7 or o3-mini?

o3-mini is cheaper. It lists at $1.10 per million input tokens and $4.40 per million output tokens; Claude Opus 4.7 lists at $5 and $25.

Is Claude Opus 4.7 or o3-mini better for coding?

Claude Opus 4.7 scores higher on coding benchmarks: 59.6 versus 40.8 in the Noometry coding category.

Which has the bigger context window?

Claude Opus 4.7 does, with 1M tokens against 200K.

How many benchmarks do Claude Opus 4.7 and o3-mini share?

37 benchmarks have published results for both models. Claude Opus 4.7 has 66 scored results on Noometry and o3-mini has 51.

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