State-of-the-art Small Language Coder Model: Mify-Coder

preprint2025arXivOpen access
Abhinav ParmarAbhisek PanigrahiAbhishek Kumar DwivediAbhishek BhattacharyaAdarsh RamachandraAditya ChoudharyAditya GargAditya RajAlankrit BhattAlpesh YadavAnant VishnuAnanthu PillaiAnkush KumarAryan PatnaikAswatha Narayanan SAvanish Raj SinghBhavya Shree GaddaBrijesh Pankajbhai KachhadiyaBuggala JahnaviChidurala Nithin KrishnaChintan ShahChunduru AkshayaDebarshi BanerjeeDebrup DeyDeepa R.Deepika B GFaiz ur RahmanGagan GayariGudhi Jagadeesh Kumar NaiduGursimar SinghHarshal TyagiHarshini KJames Mani VathalloorJayarama NettarJayashree GajjamJoe Walter Sugil GeorgeKamalakara Sri Krishna TadepalliKamalkumar RathinasamyKaran ChaurasiaKarthikeyan SKashish AroraKaushal DesaiKhushboo BuwadeKiran ManjrekarMalikireddy Venkata Sai LikhithaManjunath AMitali Mahavir BedmuthaMohammed Rafee TarafdarNikhil TiwariNikitha K GigiPavan RavikumarPendyala SwarnanjaliPiyush AnandPrakash ChandrasekarPrasanna Bhalchandra GawadePrasanth SivanPreeti KhuranaPriyanshi BabbarRajab Ali MondalRajesh Kumar VissapragadaRajeshwari GanesanRajeswari KoppisettiRamjee R.Ramkumar ThiruppathisamyRani G. S.S RekaSamarth GuptaSandeep Reddy KothakotaSarathy KSathyanarayana Sampath KumarSaurabh KumarShashank KhasareShenbaga Devi Venkatesh KumarShiva Rama Krishna ParvathamShoeb ShaikhShrishanmathi AShubham PathakSree Samhita KoppakaSreenivasa Raghavan K SSreeram VenkatasubramanianSuprabha Desai BojjaSwetha RSyed AhmedChinmai Harshitha ThotaTushar YadavVeeravelly KusumithaV V S S Prasanth PatnaikVidya Sri SesettiVijayakeerthi KVikram Raj BakshiVinay K KVinoth Kumar LoganathanVipin TiwariVivek Kumar ShrivastavV Venkata Sri Datta CharanWasim Akhtar Khan

Abstract

We present Mify-Coder, a 2.5B-parameter code model trained on 4.2T tokens using a compute-optimal strategy built on the Mify-2.5B foundation model. Mify-Coder achieves comparable accuracy and safety while significantly outperforming much larger baseline models on standard coding and function-calling benchmarks, demonstrating that compact models can match frontier-grade models in code generation and agent-driven workflows. Our training pipeline combines high-quality curated sources with synthetic data generated through agentically designed prompts, refined iteratively using enterprise-grade evaluation datasets. LLM-based quality filtering further enhances data density, enabling frugal yet effective training. Through disciplined exploration of CPT-SFT objectives, data mixtures, and sampling dynamics, we deliver frontier-grade code intelligence within a single continuous training trajectory. Empirical evidence shows that principled data and compute discipline allow smaller models to achieve competitive accuracy, efficiency, and safety compliance. Quantized variants of Mify-Coder enable deployment on standard desktop environments without requiring specialized hardware.

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