gpt-oss-120b vs Inkling Small
Inkling Small leads gpt-oss-120b on the Artificial Analysis Intelligence Index, 25.7 to 11.6, and gpt-oss-120b costs 2.4x less per output token ($0.50 vs $1.20 per million). Updated October 22, 2026; 46 benchmarks have a result for both.
gpt-oss-120b or Inkling Small: which to pick
Only Inkling Small has a coding score, 27.3 on the Vibe Coding Index; gpt-oss-120b has none, so the two cannot be ranked on coding.
Pick gpt-oss-120b for output tokens 2.4x cheaper ($0.50 vs $1.20 per million).
- Shared results
- 46
- gpt-oss-120b only
- 35
- Inkling Small only
- 38
- Like-for-like categories
- 7 of 9
Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, six public coding benchmarks
No call
Only Inkling Small has a coding score, so no call is made.
One side not measured
Intelligence
AA Intelligence Index
Inkling Small
Inkling Small leads, 25.7 against 11.6.
Same board, both measured
Agentic work
AA Agentic Index
Inkling Small
Inkling Small leads, 23.5 against 3.7.
Same board, both measured
Reasoning
GPQA Diamond
Inkling Small
Inkling Small leads, 83.6% against 78.5%.
Same board, both measured
Math
AIME
No call
Only gpt-oss-120b has a AIME result, 92.6%.
Directional only
Knowledge
MMLU Pro
Inkling Small
Inkling Small leads, 85.6% against 79.2%.
Same board, both measured
Web design
Design Arena: websites
No call
Only gpt-oss-120b has a Design Arena: websites result, 967.
Directional only
General
Vals Index
No call
Only Inkling Small has a Vals Index result, 27.6%.
Directional only
Long documents
Listed context window
Inkling Small
Inkling Small takes 524K tokens against 131K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
gpt-oss-120b
gpt-oss-120b $0.0003, Inkling Small $0.0010 per turn.
List prices
Cost per solved task
One SWE-bench Verified task, solved
Inkling Small
gpt-oss-120b $0.51, Inkling Small $0.16.
Published attempt cost and pass rate
At a glance
- Coding index
- gpt-oss-120b not benchmarked, Inkling Small 27.3 from 4 benchmarks.
- Widest category
- Agentic work, 19.8 points apart on average over 1 shared benchmark.
- Widest single gap
- SWE-bench Verified (Vals AI): gpt-oss-120b 33.6% against Inkling Small 82.2%, 48.6 points apart on a 0 to 100 scale.
- Output price
- gpt-oss-120b $0.50 against Inkling Small $1.20 per million output tokens, 2.4x apart.
- Context window
- gpt-oss-120b takes 131K tokens, Inkling Small 524K.
Benchmark by benchmark
First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.
| Category | gpt-oss-120b | Bars | Inkling Small | Ties |
|---|---|---|---|---|
| Coding | 0 | 6 | ||
| Intelligence | 0 | 2 | ||
| Agentic work | 0 | 1 | ||
| Reasoning | 0 | 8 | ||
| Math | 0 | 3 | ||
| Knowledge | 0 | 8 | ||
| General | 0 | 18 | ||
| All shared boards | 0 | 46 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index06
| Benchmark | gpt-oss-120b | Inkling Small | Leader |
|---|---|---|---|
| Aider polyglot | 41.8% | Not measured | Only gpt-oss-120b measured |
| SWE-bench Verified | 26.0% | Not measured | Only gpt-oss-120b measured |
| LMArena WebDev | Not measured | 1409 | Only Inkling Small measured |
| AA Coding Index | 30.4 | 52.9 | Inkling Small |
| LiveCodeBench (Vals AI) | 83.2% | 85.9% | Inkling Small |
| SWE-bench Verified (Vals AI) | 33.6% | 82.2% | Inkling Small |
| Terminal-Bench 4 (Vals AI) | Not measured | 0.0% | Only Inkling Small measured |
| Vibe Code Bench (Vals AI) | Not measured | 19.1% | Only Inkling Small measured |
| Code migration (Vals AI) | Not measured | 13.7% | Only Inkling Small measured |
| ProgramBench (Vals AI) | Not measured | 0.5% | Only Inkling Small measured |
| IOI (Vals AI) | Not measured | 9.3% | Only Inkling Small measured |
| Terminal-Bench 2.1 (Vals AI) | Not measured | 55.1% | Only Inkling Small measured |
| SkillsBench (Vals AI) | Not measured | 33.6% | Only Inkling Small measured |
| CyberBench (Vals AI) | Not measured | 64.1% | Only Inkling Small measured |
| LiveCodeBench (Artificial Analysis run) | 87.8% | Not measured | Only gpt-oss-120b measured |
| SciCode | 34.0% | 49.7% | Inkling Small |
| Terminal-Bench Hard (Artificial Analysis run) | 23.5% | Not measured | Only gpt-oss-120b measured |
| Terminal-Bench | 18.7% | Not measured | Only gpt-oss-120b measured |
| WeirdML | 48.2% | Not measured | Only gpt-oss-120b measured |
| ALE-Bench | 575.6 | Not measured | Only gpt-oss-120b measured |
| LMArena Text: coding | 1379 | 1450 | Inkling Small |
| LMArena Text: software and IT | 1387 | 1447 | Inkling Small |
| LMArena WebDev: React | Not measured | 1399 | Only Inkling Small measured |
| LMArena WebDev: HTML | Not measured | 1398 | Only Inkling Small measured |
| LMArena WebDev: from an image | Not measured | 1410 | Only Inkling Small measured |
| SciCode | 7.7% | Not measured | Only gpt-oss-120b measured |
| Neither model has a result on the other 13 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index02
| Benchmark | gpt-oss-120b | Inkling Small | Leader |
|---|---|---|---|
| AA Intelligence Index | 11.6 | 25.7 | Inkling Small |
| Epoch Capabilities Index | 139.8 | 150.3 | Inkling Small |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index01
| Benchmark | gpt-oss-120b | Inkling Small | Leader |
|---|---|---|---|
| AA Agentic Index | 3.7 | 23.5 | Inkling Small |
| Finance Agent (Vals AI) | Not measured | 41.3% | Only Inkling Small measured |
| Tax Agent Bench (Vals AI) | Not measured | 15.4% | Only Inkling Small measured |
| Legal Research Bench (Vals AI) | Not measured | 25.5% | Only Inkling Small measured |
| Harvey's Legal Agent Benchmark (Vals AI) | Not measured | 2.9% | Only Inkling Small measured |
| Excel Modeling Benchmark (Vals AI) | Not measured | 31.8% | Only Inkling Small measured |
| τ²-Bench Telecom | 65.8% | Not measured | Only gpt-oss-120b measured |
| APEX-Agents | 4.4% | Not measured | Only gpt-oss-120b measured |
| METR time horizons | 56.6% | Not measured | Only gpt-oss-120b measured |
| Vending-Bench 2 | -$22 | Not measured | Only gpt-oss-120b measured |
| BrowseComp-Plus | 67.0% | Not measured | Only gpt-oss-120b measured |
| Neither model has a result on the other 30 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index08
| Benchmark | gpt-oss-120b | Inkling Small | Leader |
|---|---|---|---|
| GPQA Diamond | 78.5% | 83.6% | Inkling Small |
| GPQA Diamond (Artificial Analysis run) | 78.2% | 89.5% | Inkling Small |
| Humanity's Last Exam (Artificial Analysis run) | 19.6% | 33.3% | Inkling Small |
| GPQA Diamond (Epoch AI run) | 75.8% | 88.5% | Inkling Small |
| ARC-AGI | Not measured | 84.0% | Only Inkling Small measured |
| ARC-AGI-2 | Not measured | 40.1% | Only Inkling Small measured |
| SimpleBench | 22.1% | Not measured | Only gpt-oss-120b measured |
| Mystery game puzzles | 2.0% | 6.0% | Inkling Small |
| LMArena Text: hard prompts | 1364 | 1423 | Inkling Small |
| LMArena Text: expert | 1356 | 1441 | Inkling Small |
| LMArena Text: hard prompts in English | 1368 | 1429 | Inkling Small |
| LMArena Vision: diagrams | Not measured | 1251 | Only Inkling Small measured |
| LMArena Vision: homework | Not measured | 1257 | Only Inkling Small measured |
| Kagi LLM Benchmark | 58.6% | Not measured | Only gpt-oss-120b measured |
| Neither model has a result on the other 8 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index03
| Benchmark | gpt-oss-120b | Inkling Small | Leader |
|---|---|---|---|
| AIME | 92.6% | Not measured | Only gpt-oss-120b measured |
| MATH 500 (Vals AI) | 94.8% | Not measured | Only gpt-oss-120b measured |
| MGSM (Vals AI) | 92.0% | Not measured | Only gpt-oss-120b measured |
| AA Math Index | 93.4 | Not measured | Only gpt-oss-120b measured |
| AIME 2025 (Artificial Analysis run) | 93.4% | Not measured | Only gpt-oss-120b measured |
| OTIS Mock AIME | 88.9% | 90.0% | Inkling Small |
| FrontierMath, tiers 1 to 3 | Not measured | 46.3% | Only Inkling Small measured |
| FrontierMath, tier 4 | Not measured | 17.1% | Only Inkling Small measured |
| ProofBench | Not measured | 6.0% | Only Inkling Small measured |
| LMArena Text: math | 1389 | 1459 | Inkling Small |
| LMArena Text: mathematical work | 1386 | 1441 | Inkling Small |
| Neither model has a result on the other 2 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index08
| Benchmark | gpt-oss-120b | Inkling Small | Leader |
|---|---|---|---|
| MMLU Pro | 79.2% | 85.6% | Inkling Small |
| LegalBench (Vals AI) | 75.9% | 83.0% | Inkling Small |
| CaseLaw (Vals AI) | 48.8% | Not measured | Only gpt-oss-120b measured |
| CorpFin (Vals AI) | 58.2% | 69.6% | Inkling Small |
| TaxEval (Vals AI) | 71.6% | 75.5% | Inkling Small |
| MortgageTax (Vals AI) | Not measured | 62.3% | Only Inkling Small measured |
| MedQA (Vals AI) | 91.4% | Not measured | Only gpt-oss-120b measured |
| MedCode (Vals AI) | Not measured | 37.9% | Only Inkling Small measured |
| MMLU Pro (Artificial Analysis run) | 80.8% | Not measured | Only gpt-oss-120b measured |
| SimpleQA Verified | Not measured | 19.1% | Only Inkling Small measured |
| LMArena Text: science | 1382 | 1428 | Inkling Small |
| LMArena Text: medicine and healthcare | 1388 | 1413 | Inkling Small |
| LMArena Text: legal and government | 1355 | 1415 | Inkling Small |
| LMArena Text: business and finance | 1359 | 1413 | Inkling Small |
| Neither model has a result on the other 4 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index6 boards, none shared
| Benchmark | gpt-oss-120b | Inkling Small | Leader |
|---|---|---|---|
| Design Arena: websites | 967 | Not measured | Only gpt-oss-120b measured |
| Design Arena: UI components | 924 | Not measured | Only gpt-oss-120b measured |
| Design Arena: game dev | 992 | Not measured | Only gpt-oss-120b measured |
| Design Arena: data viz | 987 | Not measured | Only gpt-oss-120b measured |
| Design Arena: 3D | 901 | Not measured | Only gpt-oss-120b measured |
| Design Arena: all code categories | 962 | Not measured | Only gpt-oss-120b measured |
| Neither model has a result on the other 3 boards here | |||
GeneralLike-for-likePublic boards, shown as published, kept out of the index018
| Benchmark | gpt-oss-120b | Inkling Small | Leader |
|---|---|---|---|
| Vals Index | Not measured | 27.6% | Only Inkling Small measured |
| Public Benefits Bench (Vals AI) | Not measured | 59.4% | Only Inkling Small measured |
| SAGE (Vals AI) | Not measured | 32.7% | Only Inkling Small measured |
| MedScribe (Vals AI) | Not measured | 84.1% | Only Inkling Small measured |
| Vals Multimodal Index | Not measured | 50.0% | Only Inkling Small measured |
| IFBench | 69.0% | Not measured | Only gpt-oss-120b measured |
| Long context reasoning (AA-LCR) | 52.0% | 75.7% | Inkling Small |
| DTBench | 76.3% | Not measured | Only gpt-oss-120b measured |
| LMCA | 22.1% | Not measured | Only gpt-oss-120b measured |
| Fiction.LiveBench | 44.4% | Not measured | Only gpt-oss-120b measured |
| Creative writing (Lech Mazur) | 77.1% | Not measured | Only gpt-oss-120b measured |
| Surface Evolver Bench | 25.0% | Not measured | Only gpt-oss-120b measured |
| LMArena Text | 1366 | 1413 | Inkling Small |
| LMArena Text: instruction following | 1318 | 1399 | Inkling Small |
| LMArena Text: creative writing | 1274 | 1334 | Inkling Small |
| LMArena Vision | Not measured | 1237 | Only Inkling Small measured |
| LMArena Text: English | 1375 | 1421 | Inkling Small |
| LMArena Text: non-English | 1351 | 1401 | Inkling Small |
| LMArena Text: Chinese | 1385 | 1464 | Inkling Small |
| LMArena Text: German | 1353 | 1408 | Inkling Small |
| LMArena Text: Japanese | 1331 | 1401 | Inkling Small |
| LMArena Text: Korean | 1282 | 1367 | Inkling Small |
| LMArena Text: French | 1370 | 1435 | Inkling Small |
| LMArena Text: Spanish | 1389 | 1422 | Inkling Small |
| LMArena Text: Russian | 1343 | 1394 | Inkling Small |
| LMArena Text: Polish | 1353 | 1428 | Inkling Small |
| LMArena Text: multi-turn | 1340 | 1416 | Inkling Small |
| LMArena Text: longer queries | 1319 | 1402 | Inkling Small |
| LMArena Text: writing and language | 1306 | 1357 | Inkling Small |
| LMArena Text: entertainment and media | 1292 | 1352 | Inkling Small |
| LMArena Vision: English | Not measured | 1243 | Only Inkling Small measured |
| LMArena Vision: Chinese | Not measured | 1292 | Only Inkling Small measured |
| LMArena Vision: reading text | Not measured | 1243 | Only Inkling Small measured |
| LMArena Vision: humor | Not measured | 1207 | Only Inkling Small measured |
| LMArena Vision: creative writing | Not measured | 1205 | Only Inkling Small measured |
| Neither model has a result on the other 11 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | gpt-oss-120b | Inkling Small | Leader |
|---|---|---|---|
| Neither model has a result on 5 boards here | |||
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
gpt-oss-120b costs less
Repository review
50K input + 3K output tokens
gpt-oss-120b costs less
Agent loop
200K input + 10K output tokens
gpt-oss-120b costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | OpenAI gpt-oss-120b | Thinking Machines Inkling Small |
|---|---|---|
| Maker | OpenAI | Thinking Machines |
| Weights | Open weights | Open weights |
| Released | August 5, 2025 | July 30, 2026 |
| Context window | 131K | 524K |
| Input $/Mtok | $0.10 | $0.45 |
| Output $/Mtok | $0.50 | $1.20 |
| Coding index | Not benchmarked | 27.3 |
| Independent measurements behind it | 1 | 4 |
| Cost per solved task | $0.51 | $0.16 |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is gpt-oss-120b better than Inkling Small for coding?
Only Inkling Small has a coding score, 27.3 on the Vibe Coding Index; gpt-oss-120b has none, so the two cannot be ranked on coding. Pick gpt-oss-120b for output tokens 2.4x cheaper ($0.50 vs $1.20 per million).
Which is cheaper, gpt-oss-120b or Inkling Small?
gpt-oss-120b costs $0.10 per million input tokens and $0.50 per million output tokens; Inkling Small costs $0.45 and $1.20. Per solved SWE-bench Verified task, gpt-oss-120b costs $0.51 and Inkling Small $0.16.
Which has the bigger context window, gpt-oss-120b or Inkling Small?
Inkling Small, with 524K tokens against 131K.
How many benchmarks is the gpt-oss-120b vs Inkling Small comparison based on?
46 benchmarks have a result for both models as of October 22, 2026. gpt-oss-120b's coding index rests on 1 independent benchmark and Inkling Small's on 4. Where only one model has a result, the page says so instead of naming a winner.