Inkling 2 Small#
Image: image
NVFP4 | MXFP8 | Playground | Tinker Cookbook | Acceptable Use
Inkling 2 Small is a general-purpose multimodal model that accepts text and image inputs and generates text outputs. It is intended for use in English and other languages, and across multiple coding languages. The model is designed to be used by developers building AI-powered applications, including agentic and tool-use systems, coding assistants, chatbots, and retrieval-augmented generation systems, and is suitable for general-purpose conversational use, instruction-following, and other natural language and visual tasks. It is released with open weights to support research, fine-tuning and integration into third-party products by downstream developers.
Languages: English, with general multilingual capabilities across other languages.
2. Getting Started#
Try Inkling 2 Small on the Tinker Playground or access via API using the Tinker Cookbook. To fine-tune Inkling 2 Small with Tinker, also install the tml-renderers package.
Inkling 2 Small supports local inference using:
Inkling 2 Small can also be post-trained with:
API access is also available through third party inference providers, including:
Required hardware#
The model is distributed in two checkpoint formats.
The main NVFP4 checkpoint requires a GPU cluster with at least 500GB of aggregated VRAM. This can be met with either of the following example configurations:
- 2x NVIDIA B300 GPUs
- 4x NVIDIA H200 GPUs
The alternative MXFP8 checkpoint requires a GPU cluster with at least 800GB of aggregated VRAM. This can be met with either of the following example configurations:
- 4x NVIDIA B300 GPUs
- 8x NVIDIA H200 GPUs
The model was pretrained, midtrained and post-trained in NVFP4, so this is the native precision for the model. We recommend the NVFP4 checkpoint for all use-cases, and we're confident that it's the best option. The MXFP8 has a very marginal 1–2 percentage points gain over the NVFP4 checkpoint over evals, but we do not think it is meaningful for any practical use-cases.
Required software#
Running the model directly on GPU hardware requires an inference deployment framework — either SGLang, vLLM, TokenSpeed, Unsloth, or Hugging Face, along with all of their respective dependency libraries.
3. Model Properties#
Model type#
Multimodal autoregressive transformer
Architecture type#
A 48-layer decoder-only transformer with a sparse Mixture-of-Experts (MoE) feed-forward backbone: each token is routed to 8 of 384 experts. Attention is a hybrid of local and global layers. The model is natively multimodal — images are encoded via a vision transformer — with image and text inputs projected into a shared hidden space and processed jointly by the decoder.
Parameters#
594B total, 17B active
Numerics support#
MXFP8 and NVFP4
Inkling 2 Small accepts text input in UTF-8 encoding and image input in any pixel-based format (with each dimension ideally between 40px and 4096px for optimal performance). It supports a context window of up to 1M tokens.
Output modalities#
Inkling 2 Small generates output as UTF-8 encoded text.
4. Training#
Training data includes a broad variety of content types, including text, images, video. Training data for the model was drawn from publicly available sources, acquired from third-parties, generated internally, or synthetically generated or augmented. Publicly available data includes content from the public internet and publicly accessible repositories.
The training data curation process includes cleaning, processing, and modifying datasets. These processing steps, which vary by data type, may include deduplication and filtering to remove junk or other low-quality data, or to advance safety or other objectives.
5. Evaluations#
| | Open Weights Flash | Open Weights Pro | Closed Weights Flash
| | Inkling 2 Small | GLM-5.3-Flash | MiMo V2.6 Flash | MiniMax-M3.1-Flash | DeepSeek-V4.1-Flash-1017 | Muse Spark Open | GLM 5.3 | MiMo V2.6 Pro | Mistral Large 4 | Kimi K3 | GPT-6 Luna | Gemini 3.8 Flash | Claude Haiku 5.5
| Model Info | | | | | | | | | | | | |
| Params (B) activated / total | 17/594 | 18/320 | 15/309 | 23/428 | 16/552 | 42/816 | 40/753 | 42/1020 | 49/1050 | 104/2800 | – | – | –
| Third Party Index | | | | | | | | | | | | |
| AA Index (v5.0) | 30.6 | 27.8 | 26.7 | 29.1 | 32.6 | 24.9 | 31.7 | 29.9 | 26.1 | – | 27.9 | 30.8 | 36.5
| Vals Index (v2.2) | 56.1% | 50.9% | 54.8% | 53.8% | 61.3% | 48.6% | 59.7% | 57.8% | 56.5% | 53.0% | 52.3% | 56.0% | 58.7%
| Coding | | | | | | | | | | | | |
| FrontierCode v2.0 stirrup v0.2.1 | 25.4% | 17.6% | 21.6% | 20.8% | 28.5% | 7.6% | 21.6% | 24.0% | 15.0% | 17.3% | 25.2% | 18.7% | 34.9%
| DeepSWE v1.1 mini-swe-agent v2.4.6 | 72.1% | 63.4% | 67.9% | 73.7% | 77.0% | 60.0% | 69.0% | 71.9% | 61.7% | 68.5% | 66.6% | 73.8% | 59.9%
| Terminal Bench Science v0.1 mini-swe-agent v2.4.6 | 5.7% | 4.8% | 4.3% | 3.3% | 12.9% | 1.9% | 9.5% | 5.7% | 4.3% | 8.1% | 8.6% | 10.0% | 20.0%
| Vibe Code Bench v1.1 openhands (vals) | 81.6% | 30.8% | 79.0% | 73.9% | 87.7% | 76.2% | 78.1% | 85.2% | 81.6% | 85.0% | 81.7% | 78.7% | 90.4%
| SWE-Atlas v1.1 mini-swe-agent v2.4.6 | 61.9% | – | – | – | 62.1% | 42.3% | – | – | – | 61.0% | 50.8% | 57.3% | 59.4%
| SWEBench Pro v2 (Hard) mini-swe-agent v2.4.6 | 86.3% | 82.8% | 89.7% | 84.3% | 89.7% | 82.4% | 84.3% | 89.2% | 83.8% | 88.2% | 88.7% | 58.8% | 52.9%
| Sudo L7 | 14.1% | – | – | – | – | – | 9.4% | – | 13.9% | 12.2% | – | 10.6% | –
| Autoresearch | | | | | | | | | | | | |
| PostTrainBench v1.2 Inkling 2 Small in Claude Code | 31.9% | 36.8% | – | – | 30.5% | – | 34.5% | – | – | 31.5% | – | – | –
| PMPP-Hard (AUC, 0–10h) pi v0.83.0 | 494.27 | – | – | – | 497.36 | – | 430.96 | – | 478.39 | 453.58 | – | – | –
| BioMysteryBench terminus v2 | 70.0% | – | 69.3% | – | – | – | – | – | – | 72.6% | 61.5% | 62.2% | 70.4%
| Search and Tools | | | | | | | | | | | | |
| BrowseComp Inkling 2 Small with compaction | 90.2% | 76.0% | 78.1% | 69.5% | 87.8% | 68.7% | 75.1% | – | 84.5% | 88.4% | 83.6% | 89.4% | 80.2%
| DeepSearchQA Inkling 2 Small with compaction | 90.9% | 84.3% | 86.0% | 82.7% | 84.5% | 80.4% | 84.7% | 90.0% | 84.4% | 95.0% | 83.5% | 90.1% | 83.2%
| MCP Atlas Full / Public | 85.4/85.0% | –/82.0% | –/62.9% | –/80.4% | –/83.2% | 89.2/87.5% | 84.2/83.6% | –/84.4% | –/84.5% | 82.3/84.2% | –/77.8% | –/87.5% | –/81.0%
| Knowledge Work | | | | | | | | | | | | |
| AA-Briefcase v1.1 | 1527 | 1451 | 1487 | 1476 | 1570 | 1279 | 1503 | 1512 | 1348 | 1497 | 1337 | 1203 | 1574
| GDPVal-AA v2.1 | 1630 | 1649 | 1614 | 1465 | 1746 | 1401 | 1657 | 1689 | 1384 | 1543 | 1444 | 1445 | 1631
| JobBench | 70.5% | 60.7% | 61.2% | 67.5% | 68.5% | 61.8% | 61.4% | 62.0% | 55.2% | 54.3% | 49.0% | 63.4% | 39.2%
| DAYJOB (Healthcare) | 6.4% | 1.2% | – | – | 6.0% | – | 4.4% | – | 3.6% | 4.0% | 1.2% | 2.0% | –
| Enterprise Operations | | | | | | | | | | | | |
| EnterpriseOps-Gym | 46.8% | 33.2% | 29.0% | 48.9% | 43.6% | 43.1% | 36.4% | 38.0% | 44.9% | 45.3% | 24.9% | 45.7% | 25.1%
| EnterpriseBench-CoreCraft | 71.8% | 46.7% | – | – | 58.5% | – | 51.8% | – | 47.7% | 43.1% | 43.1% | 58.5% | –
| Finance Work | | | | | | | | | | | | |
| Finance Agent v2.1 | 67.5% | 60.6% | 63.3% | 58.8% | 62.9% | 60.7% | 65.0% | 64.3% | 61.7% | 60.0% | 56.8% | 65.8% | 65.4%
| Excel Modeling Benchmark v1.1 | 69.5% | 66.3% | 68.9% | 67.8% | 69.2% | 62.0% | 69.1% | 67.4% | 68.7% | 71.3% | 70.0% | 72.9% | 65.5%
| Tax Agent Bench | 65.8% | 62.0% | 59.9% | 62.7% | 74.9% | 52.1% | 73.1% | 64.9% | 67.5% | 68.7% | 58.9% | 66.8% | 62.2%
| Apex-Accounting v1.1 pass@1 | 14.5% | 12.3% | – | 13.5% | 12.5% | 13.8% | 13.9% | – | 12.0% | 9.5% | 10.8% | 15.5% | 15.3%
| DAYJOB (Finance) | 14.3% | 7.3% | – | – | 12.5% | – | 11.0% | – | 4.8% | 5.5% | 6.8% | 4.5% | –
| DeepFinance | 29.8% | – | – | – | – | – | 27.5% | – | 21.5% | – | 26.4% | – | 40.0%
| Diligence Bench Best harness | 58.1% | 48.3% | – | 51.6% | 50.4% | 59.0% | 49.4% | 51.8% | 51.5% | 50.9% | 42.1% | 51.1% | 40.8%
| AA-AnalystAgent | 51.2% | 25.0% | – | – | – | – | 38.8% | 37.5% | – | 38.8% | 43.8% | 46.3% | 53.8%
| Tau 3 Banking v1.0.1 | 40.4% | 47.2% | – | – | – | – | – | – | – | 33.4% | – | – | –
| ATLAS-Finance v1.1 | 6.0% | – | – | – | – | – | 3.0% | – | – | 3.7% | – | 3.7% | –
| Legal Work | | | | | | | | | | | | |
| Harvey LAB v1.1 | 21.7% | 10.4% | 13.3% | 7.5% | 14.2% | 25.0% | 14.6% | 13.8% | 15.8% | 12.9% | 4.2% | 12.1% | 4.2%
| Legal Research Bench | 46.6% | 45.2% | 38.0% | 34.1% | 45.2% | 38.5% | 49.0% | 47.1% | 35.6% | 46.2% | 30.3% | 38.9% | 43.8%
| Visual Creation | | | | | | | | | | | | |
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