Thinking Machines Inkling Small (Reasoning, High)

thinkingmachines/inkling-small

Thinking Machines Inkling Small (Reasoning, High)

via OpenRouter

Release Date

Jul 30th, 2026

Context Size

Reasoning

Yes

Benchmark Cost

$4.44

Speed

119.0 tok/s

Subcategories

Bad Writing Habits

Detects common prose quality anti-patterns in AI-generated creative writing, including passive voice, past progressive overuse, weak dialogue tags, filter words, purple prose, cliches, AI-ism words/adverbs/names, and more.

Scenario	#1	#2	#3	#4	#5	Total
Detailed Writing Rules
Fantasy: entering an ancient ruin Creative Writing Hallucination	77	74	73	72	69	73%
Horror: alone in an eerie place at night Creative Writing Hallucination	84	82	74	70	69	76%
Literary fiction: old friends reunite Creative Writing Hallucination	82	81	75	75	74	77%
Mystery: examining a crime scene Creative Writing Hallucination	83	81	79	76	72	78%
Romance: separated couple reunites Creative Writing Hallucination	80	77	76	72	72	75%
Thriller: chase through city streets Creative Writing Hallucination	90	78	77	75	73	78%
Detailed Writing Rules						76.48%
genre
Fantasy: entering an ancient ruin Creative Writing Hallucination	70	69	69	65	63	67%
Horror: alone in an eerie place at night Creative Writing Hallucination	69	69	67	64	62	66%
Literary fiction: old friends reunite Creative Writing Hallucination	75	71	71	63	59	68%
Mystery: examining a crime scene Creative Writing Hallucination	76	72	69	67	62	69%
Romance: separated couple reunites Creative Writing Hallucination	77	77	69	66	61	70%
Thriller: chase through city streets Creative Writing Hallucination	77	74	74	70	69	73%
genre						68.88%
Novelcrafter Default Prompt
Fantasy: entering an ancient ruin Creative Writing Hallucination	76	75	71	71	67	72%
Horror: alone in an eerie place at night Creative Writing Hallucination	85	80	78	77	75	79%
Literary fiction: old friends reunite Creative Writing Hallucination	79	78	77	77	75	78%
Mystery: examining a crime scene Creative Writing Hallucination	83	82	78	78	76	79%
Romance: separated couple reunites Creative Writing Hallucination	83	81	81	80	77	80%
Thriller: chase through city streets Creative Writing Hallucination	85	79	79	78	76	79%
Novelcrafter Default Prompt						77.91%
74.42%

Codex Extraction

Evaluates a model's ability to extract structured codex entries (characters, locations, objects, lore) from prose passages and return them as well-formed XML.

Scenario	#1	#2	#3	#4	#5	Total
Long: The Spire of Echoes (Dense) Tooling Reasoning	97	96	96	95	87	94%
Medium: The Hollow (Inferred) Tooling Reasoning	97	96	95	94	94	95%
Medium: Through the Thornveil (Scattered) Tooling Reasoning	97	96	96	96	96	96%
Short: The Rusty Lantern (Explicit) Tooling Reasoning	99	99	99	99	97	98%
96.05%

Codex Red Herring (False Positive Detection)

Tests whether models correctly report "no violations" when a codex is fully consistent with the prose passage. Models that hallucinate false violations (false positives) fail. Uses a 2×2 matrix of text length × codex size, with bare and detailed-entry variants.

Scenario	#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	Total
basic entries
Long text (~1594 words), big codex (51 entries) Hallucination	17	17	17	17	17	17	17	17	17	17	17%
Long text (~1594 words), small codex (11 entries) Hallucination	100	100	100	100	100	100	100	100	100	100	100%
Short text (~524 words), big codex (51 entries) Hallucination	100	100	100	100	25	25	25	25	25	25	55%
Short text (~524 words), small codex (11 entries) Hallucination	100	100	100	100	25	25	25	25	25	25	55%
basic entries											56.67%
detailed entries
Long text (~1594 words), big codex (51 detailed entries) Hallucination	100	100	100	100	100	50	26	26	26	26	65%
Long text (~1594 words), small codex (11 detailed entries) Hallucination	100	100	100	100	100	100	100	100	100	100	100%
Short text (~524 words), big codex (51 detailed entries) Hallucination	100	100	100	100	100	100	100	25	25	25	78%
Short text (~524 words), small codex (11 detailed entries) Hallucination	100	100	100	100	100	25	25	25	25	17	62%
detailed entries											76.13%
66.40%

Codex Violation Detection

Detects factual inconsistencies between a story bible and prose passages. The model must output structured XML identifying each violation with paragraph number and substring.

Scenario	#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	Total
matrix
Large codex (40 entries), long passage (1,019 words) Tooling Reasoning	99	98	97	97	97	96	96	96	95	94	97%
Large codex (40 entries), short passage (165 words) Tooling Reasoning	98	96	96	96	95	95	94	94	92	53	91%
Small codex (7 entries), long passage (734 words) Tooling Reasoning	95	95	95	95	95	95	95	92	92	79	93%
Small codex (7 entries), short passage (165 words) Tooling Reasoning	100	100	100	100	100	100	100	100	100	100	100%
matrix											95.13%
tiers
5 codex entries Tooling Reasoning	100	100	100	100	100	100	100	100	100	100	100%
10 codex entries Tooling Reasoning	100	100	100	100	100	100	92	92	92	92	97%
20 codex entries Tooling Reasoning	89	89	85	85	85	81	81	81	81	41	80%
40 codex entries Tooling Reasoning	100	100	100	100	100	100	100	100	100	97	100%
tiers											94.10%
94.61%

Data extraction

Extract key details from a given block of text.

Scenario	#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	Total
All valid emails Utility	100	100	100	100	100	100	100	100	100	100	100%
Contextual pronoun Utility	100	100	100	100	100	100	100	100	100	100	100%
Fruits excluding citrus Utility	100	100	100	100	100	100	100	100	100	100	100%
Future event time Reasoning	100	100	100	100	100	100	100	50	50	50	85%
Guess the pet Reasoning	100	100	100	100	100	100	100	100	100	100	100%
Highest-rated movie Reasoning	100	100	100	100	100	100	100	100	100	100	100%
Indirect birth year Reasoning	100	100	100	100	100	100	100	100	100	100	100%
What instrument does Lucy play? Reasoning	100	100	100	100	100	100	100	100	100	100	100%
What's the color of the car? Utility	100	100	100	100	100	100	100	100	100	100	100%
Who's the sister? Reasoning	100	100	100	100	100	100	100	100	100	100	100%
Who's the tallest? Reasoning	100	100	100	100	100	100	100	100	100	100	100%
98.64%

Dialogue tags

Various tasks related to dialogue tags in text.

Scenario	#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	Total
dialogue-200
Write 200 words with 10% dialogue Rule Following Utility	100	100	100	99	99	97	95	57	51	50	85%
Write 200 words with 50% dialogue Rule Following Utility	91	83	81	52	50	40	30	24	1	0	45%
Write 200 words with 90% dialogue Rule Following Utility	100	100	94	91	73	50	50	35	0	0	59%
dialogue-200											63.08%
dialogue-500
Write 500 words with 30% dialogue Rule Following Utility	45	37	34	28	26	15	13	8	1	0	21%
Write 500 words with 50% dialogue Rule Following Utility	32	16	3	1	0	0	0	0	0	0	5%
Write 500 words with 70% dialogue Rule Following Utility	50	38	31	30	25	23	5	2	0	0	20%
dialogue-500											15.47%
Ungrouped
Write unattributed dialogue Rule Following	100	100	100	100	100	100	100	100	61	61	92%
46.83%

Language Comprehension

Does the model understand more than just English?

Scenario	#1	#2	#3	#4	#5	Total
Asking for directions (Dutch) Language	100	100	100	100	100	100%
Asking for directions (German) Language	100	100	100	100	100	100%
Friend got new kittens (German) Language	100	100	100	100	100	100%
Friend got new kittens (Tagalog) Language	100	100	100	100	0	80%
95.00%

Language Writing

Can the model generate text in different languages?

Scenario	#1	#2	#3	#4	#5	Total
Character dialogue (French) in a story Language	100	100	100	100	100	100%
Character dialogue (German) in a story Language	100	100	100	100	100	100%
Character dialogue (Hindi) in a story Language	100	100	58	58	50	73%
Character dialogue (Italian) in a story Language	100	100	100	100	100	100%
Character dialogue (Spanish) in a story Language	100	100	100	100	100	100%
94.67%

N-Length Sentences

Write sentences with exactly N words

Scenario	#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	Total
Write sentences with 5 words each Utility	100	100	100	100	100	100	100	100	100	100	100%
Write sentences with 10 words each Utility	100	100	100	100	100	100	100	100	100	100	100%
Write sentences with 20 words each Utility	100	100	100	100	100	100	100	100	100	100	100%
100.00%

Novel outline

Handle questions about the outline of a novel in various formats

Scenario	#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	Total
outline-count
Count acts Utility	100	100	100	100	100	100	100	100	100	100	100%
Count chapters Utility	100	100	100	100	100	100	100	100	100	100	100%
Count scenes Utility	100	100	100	100	100	100	100	100	100	100	100%
outline-count											100.00%
pov-count
Count point of views for Jack and Olivia Utility	100	100	100	100	100	100	100	50	50	50	85%
Count point of views for Jack Harper Utility	100	100	100	100	100	100	100	100	100	100	100%
Count point of views for Olivia Utility	100	100	100	100	100	100	100	100	100	100	100%
pov-count											95.00%
97.50%

Relationship tree

Extracts a deterministic XML family and relationship tree from cumulative literary prose.

Scenario	#1	#2	#3	#4	#5	Total
Core relationship tree Tooling Reasoning Hallucination	89	85	85	82	81	84%
Family relationship tree Tooling Reasoning Hallucination	80	77	77	75	68	76%
79.93%

Text Replacement

Tests deterministic text transformations: renaming characters/locations, expanding contractions, tense rewriting, POV shifts, gender swaps, combined transformations, and word avoidance. Scored by checking each expected change independently.

Scenario	#1	#2	#3	#4	#5	#6	#7	Total
Generic Prompt
Avoid said/asked/replied/answered Text Editing	100	100	100	100	100	100	100	100%
Character rename: Elena->Mirabel, Gregor->Aldric Text Editing	100	100	100	100	100	100	100	100%
Combined: 3rd person past → 1st person present Text Editing	100	100	100	100	99	93	93	98%
Expand all contractions Text Editing	100	100	100	100	100	100	100	100%
Location rename: market square, outer ring, bridge, northern mines Text Editing	100	100	100	100	100	100	100	100%
Multi-character gender swap: Priya(F)->Rohan(M), Mara unchanged Text Editing	100	100	99	99	99	99	74	96%
Passive voice → active voice Text Editing Hallucination	98	97	97	95	95	94	92	95%
POV shift: 3rd person to 1st person (Elena's perspective) Text Editing	100	100	100	100	100	100	100	100%
Tense rewriting: past to present Text Editing	97	93	89	89	82	81	64	85%
Generic Prompt								97.15%
Specific Prompt
Avoid said/asked/replied/answered Text Editing	100	100	100	100	100	100	100	100%
Character rename: Elena->Mirabel, Gregor->Aldric Text Editing	100	100	100	100	100	100	100	100%
Combined: 3rd person past → 1st person present Text Editing	100	100	99	99	99	99	99	100%
Expand all contractions Text Editing	100	100	100	100	100	100	100	100%
Location rename: market square, outer ring, bridge, northern mines Text Editing	100	100	100	100	100	100	100	100%
Multi-character gender swap: Priya(F)->Rohan(M), Mara unchanged Text Editing	100	100	100	100	100	100	100	100%
Passive voice → active voice Text Editing Hallucination	99	99	98	97	96	96	96	98%
POV shift: 3rd person to 1st person (Elena's perspective) Text Editing	100	100	100	100	100	100	100	100%
Tense rewriting: past to present Text Editing	100	100	100	100	100	100	100	100%
Specific Prompt								99.68%
98.41%

Tool usage within Novelcrafter

Output messages that are related to tool usage within Novelcrafter

Scenario	#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	Total
Create alternate prose sections Tooling	100	100	100	100	100	100	100	100	100	100	100%
100.00%

Voice/dialogue sheets

Extract dialogue from given text as voice sheets.

Scenario	#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	Total
Multiple speakers Rule Following	0	0	0	0	0	0	0	0	0	0	0%
Simple Rule Following	0	0	0	0	0	0	0	0	0	0	0%
Simple (1-shot) 1-shot Rule Following	100	100	100	100	100	100	100	0	0	0	70%
Simple (5-shot) Few-shot Rule Following	100	100	100	100	100	100	100	100	0	0	80%
Unattributed dialogue Rule Following	100	100	100	100	100	100	100	100	100	100	100%
50.00%

Write N of X

Write exactly N words/sentences/paragraphs...

Scenario	#1	#2	#3	#4	#5	#6	#7	#8	#9	#10	Total
paragraphs
1 paragraph summary Utility	100	100	100	100	100	100	100	100	100	0	90%
3 paragraph summary Utility	100	100	100	100	100	100	100	100	100	100	100%
5 paragraph summary Utility	100	100	100	100	100	100	100	100	100	100	100%
paragraphs											96.67%
sentences
1 sentence summary Utility	100	100	100	100	100	100	100	100	100	100	100%
3 sentence summary Utility	100	100	100	100	100	100	100	100	100	100	100%
10 sentence summary Utility	100	100	100	100	100	100	100	100	100	100	100%
20 sentence summary Utility	100	100	100	100	100	100	100	100	100	100	100%
50 sentence summary Utility	100	100	100	100	100	100	100	100	100	100	100%
sentences											100.00%
words
10 word summary Utility	100	100	100	100	100	100	100	100	100	100	100%
20 word summary Utility	100	100	100	100	100	100	100	100	100	100	100%
50 word summary Utility	100	100	100	100	100	100	100	100	100	100	100%
100 word summary Utility	100	100	100	100	100	100	100	100	100	100	100%
200 word summary Utility	100	100	100	100	100	100	100	100	100	98	100%
words											99.97%
99.22%