Noometry

Model comparison

GPT-5.5 Instant vs Inkling

Inkling is the stronger model overall, scoring 44.1 to 42.5 on the Noometry Index.

Last verified . 25 shared benchmarks.

GPT-5.5 Instant OpenAI

42.5

Rank #99 Confirmed

Inkling Thinking Machines Lab

44.1

Rank #75 Confirmed

Summary

  • They share 25 benchmarks with published results for both. GPT-5.5 Instant scores higher in 1 category and Inkling in 7 categories; 6 gaps are clear of the uncertainty.
  • The widest gap is in reasoning, where Inkling leads 40.6 to 24.2.
  • The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 68.1% for GPT-5.5 Instant and 88.9% for Inkling.
  • Inkling has downloadable open weights; the other is API-only.

Side by side

GPT-5.5 InstantInkling
ProviderOpenAIThinking Machines Lab
Noometry Index42.544.1
Released2026-05-052026-07-15
WeightsProprietaryOpen
Context window—66K
Max output—66K
Input $ / M tokens—$1.87
Output $ / M tokens—$4.68
Results tracked2741

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Category by category

Coding GPT-5.5 Instant leads

GPT-5.5 Instant: 43.7 (#73), Inkling: 34.1 (#229)

BenchmarkGPT-5.5 InstantInkling
SciCode48.6%47%
LMArena Coding14331463
FrontierCode—14%
LMArena WebDev—1412
FrontierSWE—4.1%
WeirdML—32.3%
ALE-Bench—946

Agentic & Tool Use Not comparable

GPT-5.5 Instant: —, Inkling: 29.5 (#76)

BenchmarkGPT-5.5 InstantInkling
APEX-Agents—33.8%
τ²-bench Banking—25%

Reasoning Inkling leads

GPT-5.5 Instant: 24.2 (#149), Inkling: 40.6 (#48)

BenchmarkGPT-5.5 InstantInkling
CritPt0%5.4%
Chess Puzzles12%21%
LMArena Hard Prompts14261452
Epoch Capabilities Index142.48148.6
ARC-AGI-2—36.5%
SimpleBench—50%
ARC-AGI-1—79.5%
DTBench—87.5%
LMCA—37.6%

Math Inkling leads

GPT-5.5 Instant: 26.1 (#241), Inkling: 31.2 (#198)

BenchmarkGPT-5.5 InstantInkling
FrontierMath (Tiers 1-3)26.3%33.3%
FrontierMath Tier 42.4%4.9%
OTIS Mock AIME 2024-202568.1%88.9%
LMArena Math14201482
ProofBench—0%

Knowledge Inkling leads

GPT-5.5 Instant: 48.9 (#68), Inkling: 55.2 (#44)

BenchmarkGPT-5.5 InstantInkling
GPQA Diamond82.5%88.3%
LMArena Expert14091468
SimpleQA Verified—40.3%

Multimodal Not comparable

GPT-5.5 Instant: 39.3 (#48), Inkling: —

BenchmarkGPT-5.5 InstantInkling
LMArena Vision1250—
LMArena Document1403—

Multilingual Inkling leads

GPT-5.5 Instant: 53.0 (#76), Inkling: 54.2 (#49)

BenchmarkGPT-5.5 InstantInkling
LMArena Non-English14171434
LMArena Chinese14571495
LMArena French14281453
LMArena German14101456
LMArena Japanese14081428
LMArena Korean13931401
LMArena Russian14301430
LMArena Spanish14301442

Instruction Following Too close to call

GPT-5.5 Instant: 74.4 (#94), Inkling: 75.3 (#65)

BenchmarkGPT-5.5 InstantInkling
LMArena Instruction Following14071427

Long Context Too close to call

GPT-5.5 Instant: 43.4 (#92), Inkling: 43.9 (#79)

BenchmarkGPT-5.5 InstantInkling
LMArena Longer Query14221436

Writing & Preference Inkling leads

GPT-5.5 Instant: 62.0 (#81), Inkling: 65.5 (#48)

BenchmarkGPT-5.5 InstantInkling
LMArena Text14191443
LMArena Creative Writing14201390
LMArena Multi-Turn14341436
EQ-Bench Creative Writing—1611
EQ-Bench 4—1226

Frequently asked questions

Is GPT-5.5 Instant better than Inkling?

Inkling is the stronger model overall, scoring 44.1 to 42.5 on the Noometry Index.

Is GPT-5.5 Instant or Inkling better for coding?

GPT-5.5 Instant scores higher on coding benchmarks: 43.7 versus 34.1 in the Noometry coding category.

How many benchmarks do GPT-5.5 Instant and Inkling share?

25 benchmarks have published results for both models. GPT-5.5 Instant has 27 scored results on Noometry and Inkling has 41.

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