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Theo Browne

Ships products
Last updated: Sep 14, 2026
RoleCEO; developer; T3 Code creator · Ping.gg
EarnsShips products
Sources13 cited fields · high confidence
@theot3dotgg

Runs multiple coding-agent harnesses through T3 Code and favors short conversational specifications with autonomous verification.

“The most important thing when you're building with AI is that the AI understands what you want and how you build.” finance.biggo.com

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Loadout

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Theo Browne’s loadout

Ships products
Harness
T3 Code
T3 Code now streams responses by default; Theo also describes it as the client that makes parallel agent work practical.
Model
Claude Fable 5.1
Calls Fable 5.1 his generally reliable model and contrasts it with Astra’s high variance.
Also uses
GPT-6 Astra
Used and reviewed alongside Fable 5.1; Theo describes it as capable of extraordinary results but unusually spiky.
ToolsComputer Use+2 more

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Models

Claude Fable 5.1
Calls Fable 5.1 his generally reliable model and contrasts it with Astra’s high variance.
x.com, 2026-09 ↗
GPT-6 Astra
Used and reviewed alongside Fable 5.1; Theo describes it as capable of extraordinary results but unusually spiky.
x.com, 2026-09 ↗
Claude Code
Runs it inside T3 Code and has also used Claude models for coding.
x.com ↗
Codex
Uses the Codex harness inside T3 Code and as a primary harness in the May 2026 workflow.
finance.biggo.com, 2026-05 ↗
Cursor
Uses it through T3 Code; earlier workflow used Cursor with Opus models.
x.com ↗

Tools

Computer Use
Lets the coding agent control a browser to verify deployed UI behavior.
finance.biggo.com, 2026-05 ↗
Whisper Flow
Uses voice-to-text for complex prompts.
finance.biggo.com, 2026-05 ↗
Shotter
Uses screenshots and annotations to give agents visual UI feedback.
finance.biggo.com, 2026-05 ↗

Workflow

  1. 1Use prompts of two sentences or fewer for most feature requests.finance.biggo.com, 2026-05
  2. 2Start a fresh thread for each task so old context does not steer the next change.finance.biggo.com, 2026-05
  3. 3Let the agent test and verify its own changes with CLI tools and browser computer use.finance.biggo.com, 2026-05
  4. 4Listen when the model pushes back and delay features it identifies as premature.finance.biggo.com, 2026-05

Timeline

  1. 2026-09-14HarnessT3 Codex.com, 2026-09
  2. 2026-09-08ModelClaude Fable 5.1x.com, 2026-09
  3. 2026-09-08Also usesGPT-6 Astrax.com, 2026-09
  4. 2026-05-27Also usesCodexfinance.biggo.com, 2026-05
  5. 2026-05-27ToolsComputer Usefinance.biggo.com, 2026-05
  6. 2026-05-27ToolsWhisper Flowfinance.biggo.com, 2026-05
  7. 2026-05-27ToolsShotterfinance.biggo.com, 2026-05

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