Skip to content
ClaudeClaude

How Factory is building autonomous software with Claude

Factory is bringing autonomy to software engineering with Droids, AI coding agents that handle enterprise work. In this conversation, Co-founder and CEO Matan Grinberg sits down with Anthropic's Kai Gill to talk about his journey founding Factory, how Claude's frontier models handle long-horizon tasks across large codebases so teams can trust agent plans with less oversight, and what it will take to build a fully autonomous "dark factory" for software. Read the full story: http://claude.com/customers/factory Chapters: 0:00 Intro 0:19 From string theory to founding Factory 1:48 The mission: autonomy for software engineering 2:22 Lessons from being too early 2:58 Droids and the "dark factory" 4:09 A COBOL modernization with 90% less human effort 4:58 When Droids need frontier models 5:29 What Opus unlocks: less human oversight 6:31 Shipping 300 things and rethinking what matters 7:11 The Anthropic partnership 8:12 What's blocking the dark factory 9:31 Advice for would-be founders

Matan GrinbergguestKai Gillhost
Oct 23, 202610mWatch on YouTube ↗

CHAPTERS

  1. 0:00 – 0:19

    Why autonomy matters: freeing humans to do the most creative work

    Matan frames autonomous software engineering as a way to reclaim human time for higher-leverage, more inventive problem solving. He argues that models can absorb the repetitive workload, creating space for people to rethink products and systems from new angles.

    • •AI systems can take over work that previously consumed most engineering time
    • •Autonomy shifts humans toward creativity and “new angles,” not busywork
    • •Opus and Fable are positioned as enablers of this time reclaiming
    • •Sets the philosophical motivation for the rest of the conversation
  2. 0:19 – 0:57

    From theoretical physics to startups: the pivot moment

    Kai asks how Matan went from a string-theory PhD path to founding Factory. Matan explains his Bay Area upbringing, his initial rejection of startup culture, and the gradual realization that he wanted to build real-world systems.

    • •Bay Area environment made startups culturally dominant, prompting an initial counter-reaction
    • •Spent ~12 years in theoretical physics as a deliberate alternative path
    • •A pivotal period in early 2023 created a clear before/after moment
    • •Motivation shifted from abstract beauty to applied impact
  3. 0:57 – 1:52

    Program synthesis “nerd sniping” and the pull toward industry messiness

    Matan describes discovering program synthesis (code generation) and becoming obsessed. He explains why academia wasn’t the right venue and why enterprise environments—with legacy languages and chaotic codebases—are where the problem becomes most meaningful.

    • •A seminar in program synthesis sparked deep interest in code generation
    • •Academia lacked the conditions needed to solve practical code-generation problems
    • •Enterprise codebases are heterogeneous (COBOL + Python, decades-old + new)
    • •Real-world constraints create the most interesting and valuable challenges
  4. 1:52 – 2:22

    Factory’s founding mission: autonomy for software engineering

    Matan states Factory’s mission has remained consistent since the first pitch deck: bring autonomy to software engineering. He emphasizes that engineers’ time is often wasted on low-leverage tasks, especially inside large enterprises.

    • •Mission continuity: “autonomy to software engineering” from day one
    • •Enterprises create low-leverage work for highly capable engineers
    • •Autonomy is framed as an efficiency and empowerment strategy
    • •Early belief that models would keep improving to support this vision
  5. 2:22 – 2:58

    Being too early: learning to become the right founder

    Kai asks about the difficult early period and the idea that being early can resemble being wrong. Matan reflects on how little he knew about company-building and how the timing gave him space to learn core skills required for scaling.

    • •Early-stage hardship described as a “journey through the desert”
    • •Founder skill gaps: hiring, product, sales, marketing, and management
    • •Timing as a “blessing in disguise” that enabled growth
    • •Scaling requires different competencies than pure problem-solving
  6. 2:58 – 4:09

    Droids in the “dark factory”: building trust and changing developer behavior

    Matan explains the “dark factory” vision: autonomous agents operating continuously with minimal human attention. He highlights gradual behavior change, the importance of trust, and a feedback-loop approach where systems monitor production, test fixes in sandboxes, and escalate to humans when needed.

    • •Agents run for days/weeks, shifting expectations about human involvement
    • •Trust becomes central as systems act without explicit approval each time
    • •Closed-loop operations: monitor metrics, detect regressions, sandbox-test fixes, redeploy
    • •Tools must be configurable to match each organization’s workflows and constraints
  7. 4:09 – 4:58

    Hero case study: COBOL modernization with 90% less human effort

    Matan shares a banking modernization example where Factory helped tackle dreaded COBOL migrations. After an initial assisted pass, subsequent projects required dramatically less human effort—creating a powerful emotional and practical win for engineers.

    • •COBOL modernization backlogs are common and unpopular in banks
    • •First migration involved close collaboration to learn the bank’s patterns
    • •System extracted lessons to apply on future projects
    • •Follow-on modernization saw ~90% reduction in human involvement
  8. 4:58 – 5:29

    Where frontier models are required: planning, orchestration, and high-context work

    The discussion turns to when “droids” need to be exceptionally smart. Matan compares frontier-model usage to delegating complex systems thinking to the most context-rich person, and notes he uses Opus for complicated planning and orchestration tasks.

    • •Not all tasks require frontier intelligence; complex planning often does
    • •Analogy: don’t spend “CTO time” on every line—delegate appropriately
    • •Frontier models are most valuable for multi-part orchestration and planning
    • •Opus is used when complexity and coordination demands are highest
  9. 5:29 – 6:18

    Opus unlock: reducing oversight and making plans trustworthy at scale

    Matan identifies reduced human oversight as the key breakthrough. Better planning reliability means humans can stop micromanaging, only revisiting plans in rare edge cases, and redirect attention toward higher-level goals.

    • •Main unlock: less monitoring because plans are more dependable
    • •Earlier failure modes surfaced late (far into long runs), increasing oversight cost
    • •Now humans can often approve without deep inspection
    • •Oversight becomes exception-based rather than constant
  10. 6:18 – 7:11

    From shipping 3 things to shipping 300: redefining what matters

    With reliability and automation, teams can ship far more. Matan argues this forces a new question: whether increased output translates to customer value, and pushes humans toward clarifying core competency and product meaning rather than throughput alone.

    • •Automation can expand delivery capacity by orders of magnitude
    • •Quantity doesn’t guarantee impact; value to customers becomes the focus
    • •Humans shift toward strategy: core competency and differentiation
    • •AI frees time for more “human” creative and conceptual work
  11. 7:11 – 8:12

    Partnering with Anthropic: reliability, safety constraints, and shared seriousness

    Matan explains the Anthropic partnership through the lens of reliability and aligned priorities. He emphasizes safety and messaging, acknowledging that powerful tools can be scary, and values partners who treat these issues as immediate—not hypothetical.

    • •Reliability as a top priority in collaboration
    • •Clear division of focus: what Factory builds vs. what Anthropic advances
    • •Safety constraints and responsible messaging matter for adoption
    • •Partnership is framed as mutual improvement: Droid with Claude and vice versa
  12. 8:12 – 8:52

    What’s blocking the “dark factory”: model, harness, and company workflows

    Matan outlines three concentric layers that determine progress: the model, the harness, and organizational workflows. He notes rapid model improvements can obsolete stale harnesses, pushing teams to continuously raise ambition and evolve their systems.

    • •Three layers: model capability, harness/tooling, and organizational workflow integration
    • •Model progress is rapid; today’s models can replace older model+harness combinations
    • •Teams must upgrade harnesses or risk being surpassed by baseline model advances
    • •The “call to arms” is to continually raise ambition as capability expands
  13. 8:52 – 9:31

    Building amid fast change: constant rethinking and deep partner alignment

    Kai asks how to build as models absorb more of the harness. Matan argues for relentless iteration—frequently revisiting assumptions—and for deep partnerships that provide visibility into where frontier capabilities are heading so teams can fill gaps and “ride the wave.”

    • •Adopt a mindset of continuous teardown and rebuilding of “best solutions”
    • •Re-evaluate architecture and approach monthly as capabilities change
    • •Partnerships help forecast where models will improve next
    • •Strategy: fill near-term holes while leveraging the longer-term trajectory
  14. 9:31 – 10:38

    Founder advice: obsession beats permission

    Matan offers contrarian advice: he tells would-be founders “no” if they need external affirmation. He recommends finding a problem you can’t stop thinking about, noting that ambitious ideas are more achievable than ever in the current era.

    • •If you need permission to found a company, you likely shouldn’t
    • •Sustained obsession with a problem is the key signal
    • •Intrinsic curiosity fuels perseverance through difficulty
    • •Modern tools and conditions make formerly “impossible” ambitions more attainable

Get more out of YouTube videos.

Read along on your phone, search it beside the video, or ask your favorite AI app what was said.

iOSAndroidClaudeChromeChatGPTComing soon