Noometry

Model comparison

Claude Instant vs o3

o3 has enough public results to be ranked (#53); Claude Instant does not yet, so treat this comparison as directional.

Last verified . 2 shared benchmarks.

Claude Instant Anthropic

28.8

Unranked Sparse

o3 OpenAI

47.4

Rank #53 Confirmed

Summary

  • They share 2 benchmarks with published results for both. Claude Instant scores higher in 0 categories and o3 in 1 category; one gap is clear of the uncertainty.
  • The widest gap is in reasoning, where o3 leads 32.1 to 18.8.
  • The biggest single-benchmark swing is DTBench: 45.8% for Claude Instant and 84.8% for o3.

Side by side

Claude Instanto3
ProviderAnthropicOpenAI
Noometry Index28.847.4
Released2023-08-092025-04-16
WeightsProprietaryProprietary
Context window—200K
Max output—100K
Input $ / M tokens—$2
Output $ / M tokens—$8
Results tracked763

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Category by category

Coding Not comparable

Claude Instant: —, o3: 47.3 (#57)

BenchmarkClaude Instanto3
SWE-bench Verified—62.3%
SWE-bench Verified (bash only)—58.4%
Aider Polyglot—81.3%
GSO—8.8%
WeirdML—52.4%
LMArena Coding—1408
CadEval—74%
ALE-Bench—933.55
HumanEval+50.6%—

Agentic & Tool Use Not comparable

Claude Instant: —, o3: 34.3 (#42)

BenchmarkClaude Instanto3
Berkeley Function Calling Leaderboard—63%
GDPval—30.8%
DeepResearch Bench—45.2%
OSWorld—23%
LMArena Search—1144
METR Time Horizons—65.4%

Reasoning o3 leads

Claude Instant: 18.8, o3: 32.1 (#66)

BenchmarkClaude Instanto3
DTBench45.8%84.8%
Epoch Capabilities Index120.2146.88
ARC-AGI-2—6.5%
SimpleBench—53.1%
Kagi LLM Benchmark—67.6%
ARC-AGI-1—60.8%
CritPt—1.4%
Chess Puzzles—38%
EnigmaEval—13.1%
LMArena Hard Prompts—1402
Mystery Game Puzzles—29%
LMCA—39.7%
ForecastBench—62.5

Math Not comparable

Claude Instant: —, o3: 48.9 (#49)

BenchmarkClaude Instanto3
FrontierMath (Tiers 1-3)—33.3%
OTIS Mock AIME 2024-2025—84.4%
Omni-MATH—71.4%
LMArena Math—1426
MATH Level 5—97.8%
FrontierMath (Feb 2025 set)—18.7%
FrontierMath Tier 4 (v1)—2.1%
GSM8K86.7%—

Knowledge Not comparable

Claude Instant: —, o3: 54.5 (#47)

BenchmarkClaude Instanto3
GPQA Diamond—81.8%
Humanity's Last Exam—20.3%
SimpleQA Verified—49.4%
MMLU-Pro—85.9%
Confabulations—14.4%
GPQA (HELM)—75.3%
LMArena Expert—1403
ARC (AI2) Challenge86.3%—
MMLU73.4%—
TriviaQA78.9%—

Multimodal Not comparable

Claude Instant: —, o3: 40.7 (#35)

BenchmarkClaude Instanto3
LMArena Vision—1214
GeoBench—74%
VPCT—52%

Multilingual Not comparable

Claude Instant: —, o3: 51.9 (#99)

BenchmarkClaude Instanto3
LMArena Non-English—1402
LMArena Chinese—1438
LMArena French—1430
LMArena German—1420
LMArena Japanese—1404
LMArena Korean—1371
LMArena Russian—1407
LMArena Spanish—1395

Instruction Following Not comparable

Claude Instant: —, o3: 73.0 (#122)

BenchmarkClaude Instanto3
IFEval—86.9%
LMArena Instruction Following—1368

Long Context Not comparable

Claude Instant: —, o3: 53.2 (#6)

BenchmarkClaude Instanto3
Fiction.LiveBench—88.9%
CL-bench—17.8%
LMArena Longer Query—1372

Writing & Preference Not comparable

Claude Instant: —, o3: 63.7 (#62)

BenchmarkClaude Instanto3
LMArena Text—1410
LMArena Creative Writing—1359
Short-Story Creative Writing—83.9%
EQ-Bench Creative Writing—1676
WildBench—86.1%
LMArena Multi-Turn—1405

Frequently asked questions

Is Claude Instant better than o3?

o3 has enough public results to be ranked (#53); Claude Instant does not yet, so treat this comparison as directional.

How many benchmarks do Claude Instant and o3 share?

2 benchmarks have published results for both models. Claude Instant has 7 scored results on Noometry and o3 has 63.

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