Noometry

Model comparison

GPT-6.1 Sol vs Inkling-Small

GPT-6.1 Sol is the stronger model overall, scoring 65.6 to 46.5 on the Noometry Index. Inkling-Small costs 6.3× less per token, which makes it the better buy when GPT-6.1 Sol's lead doesn't matter for your workload.

Last verified . 27 shared benchmarks.

GPT-6.1 Sol OpenAI

65.6

Rank #6 Confirmed

Inkling-Small Thinking Machines Lab

46.5

Rank #63 Confirmed

Summary

  • They share 27 benchmarks with published results for both. GPT-6.1 Sol scores higher in 9 categories and Inkling-Small in 0 categories; 9 gaps are clear of the uncertainty.
  • The widest gap is in math, where GPT-6.1 Sol leads 93.7 to 45.1.
  • The biggest single-benchmark swing is ProofBench: 99% for GPT-6.1 Sol and 6% for Inkling-Small.
  • Inkling-Small is cheaper at $0.45 / $1.20 per million input/output tokens, against $2 / $10 for GPT-6.1 Sol.
  • GPT-6.1 Sol accepts more context: 1.05M tokens versus 524K.
  • Inkling-Small has downloadable open weights; the other is API-only.

Side by side

GPT-6.1 SolInkling-Small
ProviderOpenAIThinking Machines Lab
Noometry Index65.646.5
Released2026-09-292026-07-15
WeightsProprietaryOpen
Context window1.05M524K
Max output128K1.05M
Input $ / M tokens$2$0.45
Output $ / M tokens$10$1.20
Results tracked3433

Sponsored placements are available on pages like this one. Advertise on Noometry

Category by category

Coding GPT-6.1 Sol leads

GPT-6.1 Sol: 63.2 (#8), Inkling-Small: 43.6 (#85)

BenchmarkGPT-6.1 SolInkling-Small
LMArena WebDev17551409
SciCode55.8%48.7%
LMArena Coding14871451
DeepSWE75.2%—
FrontierCode50.2%—

Agentic & Tool Use Not comparable

GPT-6.1 Sol: 39.6 (#26), Inkling-Small: —

BenchmarkGPT-6.1 SolInkling-Small
APEX-Agents60%—
GDP.pdf32%—

Reasoning GPT-6.1 Sol leads

GPT-6.1 Sol: 81.9 (#2), Inkling-Small: 38.6 (#63)

BenchmarkGPT-6.1 SolInkling-Small
ARC-AGI-294.2%40.1%
ARC-AGI-198.5%84%
CritPt31.7%8.3%
Chess Puzzles61%18%
LMArena Hard Prompts14661423
Mystery Game Puzzles80%6%
Epoch Capabilities Index166.09150.15
NYT Connections (extended)95.5%—
EBR-Bench54.3%—

Math GPT-6.1 Sol leads

GPT-6.1 Sol: 93.7 (#1), Inkling-Small: 45.1 (#77)

BenchmarkGPT-6.1 SolInkling-Small
FrontierMath (Tiers 1-3)93.7%46.3%
FrontierMath Tier 4100%17.1%
OTIS Mock AIME 2024-2025100%90%
ProofBench99%6%
LMArena Math14641459

Knowledge GPT-6.1 Sol leads

GPT-6.1 Sol: 71.8 (#4), Inkling-Small: 48.2 (#77)

BenchmarkGPT-6.1 SolInkling-Small
GPQA Diamond95.4%88.5%
SimpleQA Verified73.9%19.1%
LMArena Expert15021442

Multimodal GPT-6.1 Sol leads

GPT-6.1 Sol: 52.7 (#5), Inkling-Small: 39.1 (#62)

BenchmarkGPT-6.1 SolInkling-Small
LMArena Vision12881235
Furniture Assembly80%—

Multilingual GPT-6.1 Sol leads

GPT-6.1 Sol: 54.3 (#46), Inkling-Small: 51.7 (#104)

BenchmarkGPT-6.1 SolInkling-Small
LMArena Non-English14381402
LMArena Chinese14771465
LMArena Russian14551391
LMArena French—1436
LMArena German—1405
LMArena Japanese—1405
LMArena Korean—1363
LMArena Spanish—1428

Instruction Following GPT-6.1 Sol leads

GPT-6.1 Sol: 77.0 (#29), Inkling-Small: 73.8 (#114)

BenchmarkGPT-6.1 SolInkling-Small
LMArena Instruction Following14681399

Long Context GPT-6.1 Sol leads

GPT-6.1 Sol: 44.9 (#54), Inkling-Small: 42.7 (#118)

BenchmarkGPT-6.1 SolInkling-Small
LMArena Longer Query14651401

Writing & Preference GPT-6.1 Sol leads

GPT-6.1 Sol: 63.6 (#63), Inkling-Small: 59.6 (#107)

BenchmarkGPT-6.1 SolInkling-Small
LMArena Text14471414
LMArena Creative Writing14321331
LMArena Multi-Turn14491418
EQ-Bench Creative Writing—1491

Frequently asked questions

Is GPT-6.1 Sol better than Inkling-Small?

GPT-6.1 Sol is the stronger model overall, scoring 65.6 to 46.5 on the Noometry Index. Inkling-Small costs 6.3× less per token, which makes it the better buy when GPT-6.1 Sol's lead doesn't matter for your workload.

Which is cheaper, GPT-6.1 Sol or Inkling-Small?

Inkling-Small is cheaper. It lists at $0.45 per million input tokens and $1.20 per million output tokens; GPT-6.1 Sol lists at $2 and $10.

Is GPT-6.1 Sol or Inkling-Small better for coding?

GPT-6.1 Sol scores higher on coding benchmarks: 63.2 versus 43.6 in the Noometry coding category.

Which has the bigger context window?

GPT-6.1 Sol does, with 1.05M tokens against 524K.

How many benchmarks do GPT-6.1 Sol and Inkling-Small share?

27 benchmarks have published results for both models. GPT-6.1 Sol has 34 scored results on Noometry and Inkling-Small has 33.

Related comparisons

Go deeper