Model comparison
Claude Haiku 5.5 vs Inkling
Claude Haiku 5.5 is the stronger model overall, scoring 49.5 to 44.1 on the Noometry Index.
Last verified . 6 shared benchmarks.
Summary
- They share 6 benchmarks with published results for both. Claude Haiku 5.5 scores higher in 2 categories and Inkling in 2 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in math, where Claude Haiku 5.5 leads 73.6 to 31.3.
- The biggest single-benchmark swing is FrontierMath (Tiers 1-3): 75.1% for Claude Haiku 5.5 and 33.3% for Inkling.
- Claude Haiku 5.5 is cheaper at $0.10 / $0.50 per million input/output tokens, against $1.87 / $4.68 for Inkling.
- Claude Haiku 5.5 accepts more context: 1M tokens versus 66K.
- Inkling has downloadable open weights; the other is API-only.
Side by side
| Claude Haiku 5.5 | Inkling | |
|---|---|---|
| Provider | Anthropic | Thinking Machines Lab |
| Noometry Index | 49.5 | 44.1 |
| Released | 2026-10-07 | 2026-07-15 |
| Weights | Proprietary | Open |
| Context window | 1M | 66K |
| Max output | 128K | 66K |
| Input $ / M tokens | $0.10 | $1.87 |
| Output $ / M tokens | $0.50 | $4.68 |
| Results tracked | 9 | 41 |
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Category by category
Coding Claude Haiku 5.5 leads
Claude Haiku 5.5: 49.2 (#50), Inkling: 34.5 (#234)
| Benchmark | Claude Haiku 5.5 | Inkling |
|---|---|---|
| LMArena WebDev | 1587 | 1413 |
| FrontierCode | — | 14% |
| FrontierSWE | — | 4.1% |
| SciCode | — | 47% |
| WeirdML | — | 32.3% |
| LMArena Coding | — | 1464 |
| ALE-Bench | — | 946 |
Agentic & Tool Use Not comparable
Claude Haiku 5.5: —, Inkling: 29.6 (#85)
| Benchmark | Claude Haiku 5.5 | Inkling |
|---|---|---|
| APEX-Agents | — | 33.8% |
| τ²-bench Banking | — | 25% |
Reasoning Inkling leads
Claude Haiku 5.5: 35.2 (#69), Inkling: 40.4 (#56)
| Benchmark | Claude Haiku 5.5 | Inkling |
|---|---|---|
| ARC-AGI-2 | — | 36.5% |
| SimpleBench | — | 50% |
| NYT Connections (extended) | 65.7% | — |
| ARC-AGI-1 | — | 79.5% |
| CritPt | — | 5.4% |
| Chess Puzzles | — | 21% |
| LMArena Hard Prompts | — | 1451 |
| Mystery Game Puzzles | 30% | — |
| DTBench | — | 87.5% |
| LMCA | — | 37.6% |
| Epoch Capabilities Index | — | 148.54 |
Math Claude Haiku 5.5 leads
Claude Haiku 5.5: 73.6 (#18), Inkling: 31.3 (#225)
| Benchmark | Claude Haiku 5.5 | Inkling |
|---|---|---|
| FrontierMath (Tiers 1-3) | 75.1% | 33.3% |
| FrontierMath Tier 4 | 46.3% | 4.9% |
| OTIS Mock AIME 2024-2025 | 98.9% | 88.9% |
| ProofBench | — | 0% |
| LMArena Math | — | 1479 |
Knowledge Inkling leads
Claude Haiku 5.5: 50.8 (#70), Inkling: 55.1 (#49)
| Benchmark | Claude Haiku 5.5 | Inkling |
|---|---|---|
| GPQA Diamond | 89.6% | 88.3% |
| SimpleQA Verified | 23.8% | 40.3% |
| LMArena Expert | — | 1465 |
Multimodal Not comparable
Claude Haiku 5.5: 43.7 (#21), Inkling: —
| Benchmark | Claude Haiku 5.5 | Inkling |
|---|---|---|
| Furniture Assembly | 47.5% | — |
Multilingual Not comparable
Claude Haiku 5.5: —, Inkling: 54.0 (#52)
| Benchmark | Claude Haiku 5.5 | Inkling |
|---|---|---|
| LMArena Non-English | — | 1434 |
| LMArena Chinese | — | 1490 |
| LMArena French | — | 1458 |
| LMArena German | — | 1446 |
| LMArena Japanese | — | 1429 |
| LMArena Korean | — | 1404 |
| LMArena Russian | — | 1429 |
| LMArena Spanish | — | 1448 |
Instruction Following Not comparable
Claude Haiku 5.5: —, Inkling: 75.1 (#71)
| Benchmark | Claude Haiku 5.5 | Inkling |
|---|---|---|
| LMArena Instruction Following | — | 1426 |
Long Context Not comparable
Claude Haiku 5.5: —, Inkling: 43.8 (#86)
| Benchmark | Claude Haiku 5.5 | Inkling |
|---|---|---|
| LMArena Longer Query | — | 1434 |
Writing & Preference Not comparable
Claude Haiku 5.5: —, Inkling: 65.2 (#51)
| Benchmark | Claude Haiku 5.5 | Inkling |
|---|---|---|
| LMArena Text | — | 1441 |
| LMArena Creative Writing | — | 1387 |
| EQ-Bench Creative Writing | — | 1611 |
| EQ-Bench 4 | — | 1226 |
| LMArena Multi-Turn | — | 1436 |
Frequently asked questions
Is Claude Haiku 5.5 better than Inkling?
Claude Haiku 5.5 is the stronger model overall, scoring 49.5 to 44.1 on the Noometry Index.
Which is cheaper, Claude Haiku 5.5 or Inkling?
Claude Haiku 5.5 is cheaper. It lists at $0.10 per million input tokens and $0.50 per million output tokens; Inkling lists at $1.87 and $4.68.
Is Claude Haiku 5.5 or Inkling better for coding?
Claude Haiku 5.5 scores higher on coding benchmarks: 49.2 versus 34.5 in the Noometry coding category.
Which has the bigger context window?
Claude Haiku 5.5 does, with 1M tokens against 66K.
How many benchmarks do Claude Haiku 5.5 and Inkling share?
6 benchmarks have published results for both models. Claude Haiku 5.5 has 9 scored results on Noometry and Inkling has 41.