Lab release history
Last updated Jun 2, 2026
Microsoft model releases
Ships the small, efficient Phi family of open models. This page collects the lab's model releases, lifecycle events, source links, and model metadata in one crawlable record.
9 models
MAI-Thinking-1
AvailableMicrosoft's first in-house frontier reasoning model, unveiled at Build 2026. A sparse MoE (~35B active, 256K context) trained entirely on commercially licensed data without third-party distillation. Microsoft reports 97.0% on AIME 2025 and coding parity with Claude Opus 4.6 on SWE-bench Pro.
MAI-Code-1-Flash
AvailableAn inference-efficient agentic coding model from Microsoft (~5B active parameters), trained from the ground up on clean, traceable, enterprise-grade data without third-party distillation. Rolling out in GitHub Copilot; Microsoft reports a +16-point SWE-bench Pro lead over Claude Haiku 4.5.
Phi-4 Reasoning
AvailablePhi-4 reasoning-specialized model family for math, science, and chain-of-thought style tasks.
Phi-4
AvailableA 14B dense model that rivals far larger ones on math and reasoning, under a permissive MIT license.
Phi-3.5 MoE
AvailablePhi-3.5 mixture-of-experts model, scaling Microsoft's small-model line while preserving efficient active parameters.
Phi-3 Mini
Available3.8B-parameter Phi-3 model released as a phone-capable small model with 4K and 128K variants.
WizardLM-2 8x22B
AvailableMicrosoft's WizardLM-2 MoE chat model, widely mirrored and run locally after its model-card release.
Phi-2
Available2.7B-parameter Phi model showing strong reasoning and language understanding at small scale.
Phi-1
AvailableMicrosoft's first Phi small-language-model release, demonstrating strong code performance from textbook-quality synthetic data.