arc-codet5-660m / README.md
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---
license: mit
language:
- en
base_model:
- Salesforce/codet5-large
tags:
- ARC-AGI
- ARC
- code
datasets:
- WizardLMTeam/WizardLM_evol_instruct_V2_196k
- Open-Orca/SlimOrca
- camel-ai/math
- skeskinen/TinyStories-GPT4
- rajpurkar/squad_v2
- garage-bAInd/Open-Platypus
- Sharathhebbar24/arxiv-math-instruct-50k
- AlgorithmicResearchGroup/arxiv-physics-instruct-tune-30k
- TIGER-Lab/MathInstruct
- neoneye/histogram-comparisons-small-v1
- ise-uiuc/Magicoder-Evol-Instruct-110K
- PrimeIntellect/INTELLECT-MATH-SFT-Data
- PrimeIntellect/verifiable-math-problems
- sethapun/arithmetic_2md_1to1000
- EleutherAI/proof-pile-2
- MMInstruction/M3IT
- stingning/ultrachat
- timdettmers/openassistant-guanaco
- Dahoas/instruct-synthetic-prompt-responses
- pankajmathur/WizardLM_Orca
---
This checkpoint is the primary CodeT5-based solver we used for the MindsAI @ Tufa Labs entry in the ARC Prize 2025 competition. It shares the same architecture as `mindware/arc-codet5-660m-scr` (a 16-layer decoder variant of `Salesforce/codet5-large`), but *does not* include the Span-Corruption Refinement (SCR) auxiliary training stage. Instead, it represents the best non-refinement checkpoint obtained during long-horizon pretraining on TPU-v4 systems.
- **No SCR stage**: this model was trained purely with the original span-corruption + instruction fine-tuning curriculum + ARC fine tunining.
- **Decoder-only pruning**: the original decoder depth (24) was reduced to 16 layers after experiments showed encoder pruning harmed sample efficiency, while decoder pruning could be recovered through extended training.
- **Long-run TPU training**: training spanned roughly two years on a V4-64 TPU, made possible by Google’s TPU Research Cloud program.
📚 ARC-Related Datasets & Frameworks
RE-ARC Link: https://github.com/michaelhodel/re-arc
Note: This is the repository from Michael Hodel, which procedurally generates examples for the 400 ARC training tasks. We also include RE-ARC eval and ARC 1.5 (also by Michael Hodel).
ConceptARC Link: https://github.com/victorvikram/ConceptARC
1D-ARC (likely "ID ARC") Link: https://khalil-research.github.io/LLM4ARC/
ARC_gym
Sort-of-ARC
Andreas Koepf - Generated many tasks based upon the RE-ARC methodology using various foundation models. Additionally generated from a generator Andreas wrote based on the icecuber solution. It also includes extra tasks like predicting the solution graph.
Jack Cole - Wrote generators for 60-80 tasks. Many were inspired by ARC items. Others were large concept datasets (cellular automata, math equation derived boards).
There is a large amount of ARC-related tasks that are not solving for the board (like generating code, predicting various parameters or features related to the task). There are other non-ARC related tasks.
## ARC Data Formatting
- ARC tasks ship as JSON where each `task_id` contains `train` pairs and `test` inputs; every grid is a rectangular list of lists with integers `0-9`. Dimensions follow the original 1×1–30×30 spec, though the evaluator accepts up to 50×50.
- Example task payload:
```json
{
"task_id": {
"train": [
{"input": [[0,0],[1,1]], "output": [[1,1],[1,1]]}
],
"test": [
{"input": [[0,0,0],[0,1,0],[0,0,0]]}
]
}
}
```
- Model prompts (`prompt` column during training/TTT/inference) are serialized text strings: `solve: train input1 <train_input> output1 <prefix><train_output>. … test tinput1 <test_input> toutput1 `. Each grid token `<train_input>` / `<train_output>` / `<test_input>` is produced by `grid_to_string`, so rows are concatenated digits separated by spaces. Multiple train examples increment the index (`input2`, `output2`, etc.).
- Prompt example:
```text
solve: train input1 000 010 000 output1 11 3 3 10 111 101 111. input2 00 02 output2 5 2 2 20 22 20. test tinput1 0000 0300 0000 0000 toutput1
```
- Model targets (`correct_answer` column and expected decoder output before post-processing) follow `output_prefix` semantics: ` {total_chars} {height} {width} {symbols} {row_strings}.` Here `total_chars = height*width + (height - 1)` and `symbols` is the deduplicated sequence of colors as they are first encountered when scanning the board row-major; that rule applies to every output grid we emit (training outputs inside the prompt and the predicted test toutput). Example target string for a 3×3 donut:
```text
11 3 3 10 111 101 111.
```