> Inkling-Small is an open-weights AI model from Thinking Machines, released 30 Jul 2026. Index score 154 (GPT-4 = 100), rank 48 of 229 ranked models. API price $0.45 in / $1.2 out per million tokens, 524K context.

[Models](https://themodelindex.org/models/) /[Thinking Machines](https://themodelindex.org/labs/thinking-machines/)

TM

# Inkling-Small

Thinking Machines

Released 30 Jul 2026

Open

Date verified

[Compare](https://themodelindex.org/compare/inkling-small-vs-claude-opus-5/) [Run it yourself →](https://themodelindex.org/local/) [Announcement](https://thinkingmachines.ai/news/inkling-small/)

154143–165

Index score

#48 of 229 models

3/ 8

Core tests taken

3 of 6 areas · plus 7 anchor tests

−33

Versus the frontier at release

best then: Claude Opus 5

$0.45/ $1.2

Price per million tokens

input / output, list price

524K

Context window

tokens it reads at once

## Where it sits · on the frontier

_Chart: Model Index score of every scored model since late 2022, with the best closed and best open model over time_

Gemini 3 Pro reached this score 8 months earlier.

## Test results · by area · tick = best by any model

Show 7 anchor tests

Reasoning & knowledge

evidence

GPQA Diamond

89%

Humanity's Last Exam

no result

Maths

evidence

FrontierMath T1-3

46%

Coding

no evidence yet

SWE-bench Verified

no result

Terminal-Bench

no result

Agents

evidence

APEX-Agents

no result

Novel problems

evidence

ARC-AGI-2

40%

Long tasks

no evidence yet

METR time horizon

no result

Independent results from the Epoch AI benchmarking hub, best reasoning setting. The core tests are shown here; anchor tests also inform the score and can be shown above.

## What others say · rank on each leaderboard

The Model Index

independent tests, our method

#48

of 219 · 154

Artificial Analysis Intelligence Index

overall capability across ten evaluations

#39

of 207 · 26

LMArena · Maths

maths questions in chat

#72

of 373 · 1447

Epoch Capabilities Index

overall capability from many benchmarks

#47

of 239 · 150.2

LMArena · Coding

coding questions in chat

#104

of 383 · 1474

LMArena · Text

overall chat quality, judged by people

#134

of 388 · 1405

LMArena · Vision

understanding images

#71

of 149 · 1207

LMArena · Creative writing

creative writing

#196

of 386 · 1310

LMArena · WebDev

building web apps and front ends

#73

of 123 · 1408

Further left is better. Leaderboards measure different things: LMArena is people voting blind between two answers, the others are test scores. Click any row for the source.

## Best at · top three among current models

Not in the top three among current models on any category we track.

Where this model places in the top three of today's models, on category leaderboards and on our core tests.

## Where to use it · prices checked 1 Oct 2026

#### From the lab

TM

Tinker

API

↗

#### API providers · 1 · per million tokens, in / out

D

DeepInfra

$0.45 / $1.2 · fp8

cheapest

#### Run it yourself

🤗

Official weights

thinkingmachines/Inkling-Small

↗

Provider prices come from OpenRouter's live listing; going direct to a provider can differ. Subscriptions are the lab's own apps.

## Facts and sources

Released

30 Jul 2026

Announcement

[thinkingmachines.ai ↗](https://thinkingmachines.ai/news/inkling-small/)

Release entry

Inkling-Small

Scored as

Inkling-Small

Artificial Analysis index

26

Weights

[huggingface.co/thinkingmachines/Inkling ↗](https://huggingface.co/thinkingmachines/Inkling)

Output speed

185 tokens/s

Hugging Face

[thinkingmachines/Inkling-Small ↗](https://huggingface.co/thinkingmachines/Inkling-Small)

## Thinking Machines releases · around this one

Inkling

Open

15 JUL 2026

index 150

Inkling-Small

Open

30 JUL 2026

index 154

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Source: https://themodelindex.org/models/inkling-small/ · The Model Index · data as of 2026-10-01