Claude Haiku 5.5 vs Inkling 2 Small
Claude Haiku 5.5 leads Inkling 2 Small on coding, 68.4 to 48.9 on the Vibe Coding Index, and Claude Haiku 5.5 costs 2.0x less per output token ($0.50 vs $1.00 per million). Updated November 14, 2026; 49 benchmarks have a result for both.
Claude Haiku 5.5 or Inkling 2 Small: which to pick
Pick Claude Haiku 5.5 for coding: it scores 68.4 on the Vibe Coding Index against 48.9 for Inkling 2 Small.
Pick Inkling 2 Small for a larger context window (1.05M against 1M tokens) and work measured by LMArena WebDev or LMArena Text: coding, where it leads.
- Shared results
- 49
- Claude Haiku 5.5 only
- 58
- Inkling 2 Small only
- 2
- Like-for-like categories
- 6 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
Claude Haiku 5.5
Claude Haiku 5.5 scores 68.4 against 48.9.
5 and 3 benchmarks behind the scores
Intelligence
AA Intelligence Index
Claude Haiku 5.5
Claude Haiku 5.5 leads, 36.5 against 30.6.
Same board, both measured
Web design
Design Arena: websites
No call
Only Claude Haiku 5.5 has a Design Arena: websites result, 1253.
Directional only
General
Vals Index
Claude Haiku 5.5
Claude Haiku 5.5 leads, 58.7% against 56.1%.
Same board, both measured
Long documents
Listed context window
Inkling 2 Small
Inkling 2 Small takes 1.05M tokens against 1M.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Claude Haiku 5.5
Claude Haiku 5.5 $0.0003, Inkling 2 Small $0.0008 per turn.
List prices
At a glance
- Coding index
- Claude Haiku 5.5 68.4 from 5 benchmarks, Inkling 2 Small 48.9 from 3 benchmarks.
- Widest category
- Coding, 7.3 points apart on average over 14 shared benchmarks.
- Widest single gap
- Terminal-Bench 4 (Vals AI): Claude Haiku 5.5 36.4% against Inkling 2 Small 12.6%, 31.6 points apart on a 0 to 100 scale.
- Output price
- Claude Haiku 5.5 $0.50 against Inkling 2 Small $1.00 per million output tokens, 2.0x apart.
- Context window
- Claude Haiku 5.5 takes 1M tokens, Inkling 2 Small 1.05M.
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 | Claude Haiku 5.5 | Bars | Inkling 2 Small | Ties |
|---|---|---|---|---|
| Coding | 9 | 5 | ||
| Intelligence | 1 | 0 | ||
| Agentic work | 5 | 3 | ||
| Reasoning | 4 | 5 | ||
| Knowledge | 1 | 2 | ||
| General | 3 | 11 | ||
| All shared boards | 23 | 26 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index95
| Benchmark | Claude Haiku 5.5 | Inkling 2 Small | Leader |
|---|---|---|---|
| LiveBench coding | 77.6% | Not measured | Only Claude Haiku 5.5 measured |
| LMArena WebDev | 1593 | 1647 | Inkling 2 Small |
| Terminal-Bench 4 (Vals AI) | 36.4% | 12.6% | Claude Haiku 5.5 |
| Vibe Code Bench (Vals AI) | 90.4% | 81.5% | Claude Haiku 5.5 |
| Code migration (Vals AI) | 44.6% | Not measured | Only Claude Haiku 5.5 measured |
| ProgramBench (Vals AI) | 2.5% | 0.5% | Claude Haiku 5.5 |
| IOI (Vals AI) | 47.3% | Not measured | Only Claude Haiku 5.5 measured |
| SWE-bench Multimodal (Vals AI) | 44.0% | 43.1% | Claude Haiku 5.5 |
| Vibe Code Bench 1-100 (Vals AI) | 20.4% | Not measured | Only Claude Haiku 5.5 measured |
| CyberBench (Vals AI) | 75.5% | 72.7% | Claude Haiku 5.5 |
| SciCode | 55.0% | 52.3% | Claude Haiku 5.5 |
| Terminal-Bench 4.0 (Artificial Analysis run) | 32.8% | 13.1% | Claude Haiku 5.5 |
| FrontierCode 2.0 | 34.9% | 25.4% | Claude Haiku 5.5 |
| FrontierCode | 46.4% | Not measured | Only Claude Haiku 5.5 measured |
| FrontierSWE | 43.8% | Not measured | Only Claude Haiku 5.5 measured |
| MirrorCode | 78.9% | Not measured | Only Claude Haiku 5.5 measured |
| ALE-Bench | 1587.0 | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: coding | 1454 | 1455 | Inkling 2 Small |
| LMArena Text: software and IT | 1443 | 1443 | Claude Haiku 5.5 |
| LMArena WebDev: React | 1615 | 1660 | Inkling 2 Small |
| LMArena WebDev: HTML | 1564 | 1661 | Inkling 2 Small |
| SciCode | 9.2% | Not measured | Only Claude Haiku 5.5 measured |
| SWE-Bench Pro V2 | 87.2% | 97.7% | Inkling 2 Small |
| GameBench 2 | 75.1 | Not measured | Only Claude Haiku 5.5 measured |
| Terminal-Bench 4.0 | 40.0% | Not measured | Only Claude Haiku 5.5 measured |
| CursorBench 4.0 | 48.4% | Not measured | Only Claude Haiku 5.5 measured |
| Neither model has a result on the other 26 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | Claude Haiku 5.5 | Inkling 2 Small | Leader |
|---|---|---|---|
| AA Intelligence Index | 36.5 | 30.6 | Claude Haiku 5.5 |
| Epoch Capabilities Index | 160.4 | Not measured | Only Claude Haiku 5.5 measured |
Agentic workLike-for-likePublic boards, shown as published, kept out of the index53
| Benchmark | Claude Haiku 5.5 | Inkling 2 Small | Leader |
|---|---|---|---|
| LiveBench research | 84.3% | Not measured | Only Claude Haiku 5.5 measured |
| LiveBench browser | 69.5% | Not measured | Only Claude Haiku 5.5 measured |
| LiveBench long agentic | 47.9% | Not measured | Only Claude Haiku 5.5 measured |
| SREBench (Vals AI) | 5.7% | 1.9% | Claude Haiku 5.5 |
| Finance Agent (Vals AI) | 54.1% | Not measured | Only Claude Haiku 5.5 measured |
| Tax Agent Bench (Vals AI) | 31.9% | 38.9% | Inkling 2 Small |
| Legal Research Bench (Vals AI) | 43.8% | 46.6% | Inkling 2 Small |
| Harvey's Legal Agent Benchmark (Vals AI) | 4.2% | 21.7% | Inkling 2 Small |
| Excel Modeling Benchmark (Vals AI) | 59.0% | Not measured | Only Claude Haiku 5.5 measured |
| BioMysteryBench (Vals AI) | 70.4% | 70.0% | Claude Haiku 5.5 |
| Terminal-Bench-Science (Vals AI) | 10.0% | 2.9% | Claude Haiku 5.5 |
| Vals Science Index | 38.5% | 32.7% | Claude Haiku 5.5 |
| APEX-Agents | 56.1% | 46.8% | Claude Haiku 5.5 |
| Vending-Bench 2 | $3,602 | Not measured | Only Claude Haiku 5.5 measured |
| MCP Atlas | Not measured | 85.4% | Only Inkling 2 Small measured |
| Neither model has a result on the other 29 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index45
| Benchmark | Claude Haiku 5.5 | Inkling 2 Small | Leader |
|---|---|---|---|
| LiveBench reasoning | 82.4% | Not measured | Only Claude Haiku 5.5 measured |
| MysteryMechanism (Vals AI) | 35.1% | 25.2% | Claude Haiku 5.5 |
| Humanity's Last Exam (Artificial Analysis run) | 44.4% | 44.1% | Claude Haiku 5.5 |
| HLE-Diamond (Artificial Analysis run) | 29.6% | 28.7% | Claude Haiku 5.5 |
| CritPt v2, hard subset (Artificial Analysis run) | 47.5% | 35.0% | Claude Haiku 5.5 |
| GPQA Diamond (Epoch AI run) | 89.6% | Not measured | Only Claude Haiku 5.5 measured |
| ARC-AGI | 89.0% | 96.5% | Inkling 2 Small |
| ARC-AGI-2 | 61.3% | 81.7% | Inkling 2 Small |
| Chess puzzles | 55.0% | Not measured | Only Claude Haiku 5.5 measured |
| Mystery game puzzles | 30.0% | Not measured | Only Claude Haiku 5.5 measured |
| EBR-bench | 43.8% | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: hard prompts | 1418 | 1421 | Inkling 2 Small |
| LMArena Text: expert | 1443 | 1478 | Inkling 2 Small |
| LMArena Text: hard prompts in English | 1422 | 1424 | Inkling 2 Small |
| Neither model has a result on the other 12 boards here | |||
MathDirectional onlyPublic boards, shown as published, kept out of the index7 boards, none shared
| Benchmark | Claude Haiku 5.5 | Inkling 2 Small | Leader |
|---|---|---|---|
| OTIS Mock AIME | 98.9% | Not measured | Only Claude Haiku 5.5 measured |
| FrontierMath, tiers 1 to 3 | 75.1% | Not measured | Only Claude Haiku 5.5 measured |
| FrontierMath, tier 4 | 46.3% | Not measured | Only Claude Haiku 5.5 measured |
| ProofBench | 89.0% | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: math | 1436 | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: mathematical work | 1437 | Not measured | Only Claude Haiku 5.5 measured |
| MathArena | Not measured | 42.4% | Only Inkling 2 Small measured |
| Neither model has a result on the other 7 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index12
| Benchmark | Claude Haiku 5.5 | Inkling 2 Small | Leader |
|---|---|---|---|
| MedCode (Vals AI) | 51.5% | Not measured | Only Claude Haiku 5.5 measured |
| AA-Omniscience | 12.3 | 16.1 | Inkling 2 Small |
| SimpleQA Verified | 23.8% | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: science | 1411 | 1409 | Claude Haiku 5.5 |
| LMArena Text: medicine and healthcare | 1367 | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: legal and government | 1389 | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: business and finance | 1400 | 1415 | Inkling 2 Small |
| FACTS Benchmark Suite | 47.3% | Not measured | Only Claude Haiku 5.5 measured |
| Neither model has a result on the other 13 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index9 boards, none shared
| Benchmark | Claude Haiku 5.5 | Inkling 2 Small | Leader |
|---|---|---|---|
| Design Arena: websites | 1253 | Not measured | Only Claude Haiku 5.5 measured |
| Design Arena: UI components | 1271 | Not measured | Only Claude Haiku 5.5 measured |
| Design Arena: game dev | 1316 | Not measured | Only Claude Haiku 5.5 measured |
| Design Arena: data viz | 1277 | Not measured | Only Claude Haiku 5.5 measured |
| Design Arena: 3D | 1321 | Not measured | Only Claude Haiku 5.5 measured |
| Design Arena: all code categories | 1278 | Not measured | Only Claude Haiku 5.5 measured |
| Design Arena: SVG | 1193 | Not measured | Only Claude Haiku 5.5 measured |
| Design Arena: ASCII art | 1210 | Not measured | Only Claude Haiku 5.5 measured |
| LiveBench design | 79.3% | Not measured | Only Claude Haiku 5.5 measured |
GeneralLike-for-likePublic boards, shown as published, kept out of the index311
| Benchmark | Claude Haiku 5.5 | Inkling 2 Small | Leader |
|---|---|---|---|
| Vals Index | 58.7% | 56.1% | Claude Haiku 5.5 |
| LiveBench data analysis | 53.1% | Not measured | Only Claude Haiku 5.5 measured |
| Public Benefits Bench (Vals AI) | 63.2% | Not measured | Only Claude Haiku 5.5 measured |
| SAGE (Vals AI) | 89.8% | 88.6% | Claude Haiku 5.5 |
| MedScribe (Vals AI) | 89.5% | Not measured | Only Claude Haiku 5.5 measured |
| Long context reasoning (AA-LCR) | 82.7% | 83.3% | Inkling 2 Small |
| GDPval-AA | 1629 | 1630 | Inkling 2 Small |
| DTBench | 95.0% | Not measured | Only Claude Haiku 5.5 measured |
| LMCA | 51.1% | Not measured | Only Claude Haiku 5.5 measured |
| Furniture assembly | 47.5% | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text | 1398 | 1403 | Inkling 2 Small |
| LMArena Text: instruction following | 1411 | 1408 | Claude Haiku 5.5 |
| LMArena Text: creative writing | 1337 | 1348 | Inkling 2 Small |
| LMArena Text: English | 1406 | 1418 | Inkling 2 Small |
| LMArena Text: non-English | 1385 | 1390 | Inkling 2 Small |
| LMArena Text: Chinese | 1433 | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: German | 1429 | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: Japanese | 1374 | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: Korean | 1382 | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: French | 1427 | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: Spanish | 1397 | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: Russian | 1377 | 1377 | Inkling 2 Small |
| LMArena Text: Polish | 1378 | Not measured | Only Claude Haiku 5.5 measured |
| LMArena Text: multi-turn | 1388 | 1408 | Inkling 2 Small |
| LMArena Text: longer queries | 1395 | 1403 | Inkling 2 Small |
| LMArena Text: writing and language | 1369 | 1381 | Inkling 2 Small |
| LMArena Text: entertainment and media | 1351 | 1359 | Inkling 2 Small |
| MultiChallenge | 67.7% | Not measured | Only Claude Haiku 5.5 measured |
| Neither model has a result on the other 21 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Claude Haiku 5.5 | Inkling 2 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
Claude Haiku 5.5 costs less
Repository review
50K input + 3K output tokens
Claude Haiku 5.5 costs less
Agent loop
200K input + 10K output tokens
Claude Haiku 5.5 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 | Anthropic Claude Haiku 5.5 | Thinking Machines Inkling 2 Small |
|---|---|---|
| Maker | Anthropic | Thinking Machines |
| Weights | No public weights listed | Open weights |
| Released | October 7, 2026 | November 9, 2026 |
| Context window | 1M | 1.05M |
| Input $/Mtok | $0.10 | $0.30 |
| Output $/Mtok | $0.50 | $1.00 |
| Coding index | 68.4 | 48.9 |
| Independent measurements behind it | 5 | 3 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Claude Haiku 5.5 better than Inkling 2 Small for coding?
Pick Claude Haiku 5.5 for coding: it scores 68.4 on the Vibe Coding Index against 48.9 for Inkling 2 Small. Pick Inkling 2 Small for a larger context window (1.05M against 1M tokens) and work measured by LMArena WebDev or LMArena Text: coding, where it leads.
Which is cheaper, Claude Haiku 5.5 or Inkling 2 Small?
Claude Haiku 5.5 costs $0.10 per million input tokens and $0.50 per million output tokens; Inkling 2 Small costs $0.30 and $1.00. Cost per solved task is known for neither of them.
Which has the bigger context window, Claude Haiku 5.5 or Inkling 2 Small?
Inkling 2 Small, with 1.05M tokens against 1M.
How many benchmarks is the Claude Haiku 5.5 vs Inkling 2 Small comparison based on?
49 benchmarks have a result for both models as of November 14, 2026. Claude Haiku 5.5's coding index rests on 5 independent benchmarks and Inkling 2 Small's on 3. Where only one model has a result, the page says so instead of naming a winner.