Compare AI tools

	Sudowrite S	GitHub Copilot B	Symphony A	Aider A
Tagline	AI writing tool built specifically for fiction writers.	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	OpenAI's open-source daemon that turns your Linear board into an always-on coding agent factory — tickets go in, pull requests come out.	Terminal-based AI pair programmer. Git-aware, model-flexible.
Category	Writing	Coding	Agents	Coding
Pricing	$19-$59/mo	Free (limited) + $10/mo Pro + $19/mo Business	Free (open-source)	Free (open source) + whatever API you use
Best for	Novelists, screenwriters, fiction short-form writers.	Teams with GitHub already. Devs who don't want to change IDEs.	Engineering teams already using Linear + OpenAI Codex who want to stop babysitting agent sessions and instead let the issue tracker drive autonomous coding at scale.	Developers who want open-source tooling with full control.
Strengths	Brainstorm, expand, rewrite modes designed for fiction Story Bible for character + plot tracking Understands voice + tone better than generic chatbots	Great enterprise story Works in your existing IDE Chat + autocomplete	Fully autonomous ticket-to-PR pipeline: every open Linear issue gets its own isolated Codex agent without manual supervision Fault-tolerant Elixir/OTP architecture automatically restarts crashed agents and manages hundreds of concurrent runs WORKFLOW.md keeps all orchestration policy version-controlled inside the repo, so agent behavior is reproducible and reviewable like code Proven internal results: OpenAI reported a 500% increase in landed PRs on some teams within three weeks Open spec encourages community re-implementations in any language, not just Elixir	Works in any terminal Auto-commits changes with meaningful messages Works with any model (Claude, GPT, local) Minimal learning curve
Weaknesses	Pricey for casual use Fiction-only focus — not for business writing	Less agentic than Cursor/Claude Code Model quality varies	Currently only supports Linear as an issue tracker — GitHub Issues and Jira integrations are not yet official Only OpenAI Codex is officially supported as the agent runtime; other model integrations are community-contributed and incomplete Self-hosted, Elixir-dependent engineering preview with no built-in sandboxing — not suitable for untrusted or production environments out of the box	Terminal-only Less agentic than Claude Code Setup on Windows is fiddly
Kai's verdict	S-tier for fiction. If you're writing a novel, this beats raw ChatGPT every time.	B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.	Symphony is the most architecturally serious 'issue tracker as control plane' approach yet — 15K GitHub stars in weeks confirms the idea resonates — but it's still a rough, self-hosted engineering preview that demands Elixir chops and a Linear-only workflow. (Verdict pending Phi's full review.)	A-tier. The right answer if you want open-source + terminal-native + model-agnostic.
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