Article · 2026-08-18 · 4 moments

Mojo🔥 is now open source

Mojo🔥 is now open source Mojo🔥 is now open source The Mojo programming language has been promising an open source release since May 2023. Last week they shipped their 1.0 and today they have followed through on that original promise, releasing the compiler and toolchain under an Apache 2 license. When Mojo first launched the stated goal was to produce a superset of Python, so existing Python code could be used to bootstrap their own ecosystem. That plan changed around August 2025: Mojo may ✦ AI generated

Read original ↗

GUEST article author GUEST Mojo team HOST Simon Willison

Prediction

AI-assisted coding tools are effectively helping migrate Python code to Mojo today, and future tooling will improve this process further.

The Mojo team is optimistic about AI-assisted coding tools facilitating the migration from Python to Mojo, with expectations that future tooling improvements will make the transition even smoother.

transcript

Mojo team: We're encouraged by how well AI-assisted coding tools already help migrate Python to Mojo today, and we're confident that future tooling and ecosystem maturity will make this evolution even smoother.

provides context · 1

Claim◆

Mojo🔥 has released its compiler and toolchain as open source under an Apache 2 license.

The Mojo programming language has fulfilled its long-standing open source promise by releasing its compiler and toolchain under the Apache 2 license.

transcript

article author: The Mojo programming language has been promising an open source release since May 2023. Last week they shipped their 1.0 and today they have followed through on that original promise, releasing the compiler and toolchain under an Apache 2 license.

Definition

Mojo is now a standalone language optimized for GPU programming with Python-inspired syntax, though not fully compatible with existing Python code.

Mojo has evolved into its own language focused on making GPU programming easy, using Python-inspired syntax while maintaining independence from full Python compatibility.

transcript

article author: Today Mojo is its own language, optimized to make GPU programming as painless as possible using syntax inspired by Python, if not 100% compatible with existing code.

explains mechanism · 1provides context · 1

Fact◆

Mojo's original goal of being a Python superset has changed, and the language may never become a full superset of Python.

The Mojo team has shifted away from its original goal of creating a Python superset, acknowledging the language may not achieve full Python compatibility.

transcript

article author: When Mojo first launched the stated goal was to produce a superset of Python, so existing Python code could be used to bootstrap their own ecosystem. That plan changed around August 2025: Mojo may or may not evolve into a full superset of Python, and it's okay if it doesn't.

Highlight slides

Mojo's Python Superset Goal Abandoned✦ from: Mojo's original goal of being a Python superset has changed, and the language may never become a full superset of Python.Mojo🔥 Goes Fully Open Source✦ from: Mojo🔥 has released its compiler and toolchain as open source under an Apache 2 license.Strategic Shift in 2025✦ from: Mojo's original goal of being a Python superset has changed, and the language may never become a full superset of Python.From Promise to Reality✦ from: Mojo🔥 has released its compiler and toolchain as open source under an Apache 2 license.

Related episodes

Video · All-In Podcast

OpenAI vs Anthropic IPOs, Anthropic $3T, Zuck's Price War, China Ends Open Source?, Trump Accounts

→

Article · Interconnects

Teaching Everyone to Fish for Tokens

→

Video · BG2 Pod

The SpaceX IPO, Fable 5, AI Capex Update & Market Check w/ Gavin Baker, Andrew Fox & Clark Tang

→